Agus Widyianto

@uny.ac.id

Automotive Engineering
Universitas Negeri Yogyakarta



              

https://researchid.co/aguswidyianto16

RESEARCH INTERESTS

Welding technology
Materials science
Control system
Soft computing

32

Scopus Publications

155

Scholar Citations

8

Scholar h-index

6

Scholar i10-index

Scopus Publications

  • Comparison of Brake Cooling System on Bus: Simulation and Evaluation of Natural vs Forced Air through Machine Learning Processing
    Gunadi Gunadi, Agus Widyianto, Yosef Budiman, Kurniawan Sigit Wahyudi, I Wayan Adiyasa, Naufal Annas Fauzi, Zainal Arifin, and Nu Nu Tun
    Akademia Baru Publishing
    Intense braking can cause heat accumulation that can reduce the braking system’s efficiency and damage the braking system components due to changes in material structure. The high temperature in the braking system of heavy vehicles requires an air-cooling system that produces high-pressure air. This study compares the cooling process results between natural air and forced air. CFD modeling was chosen as the method to simulate the cooling process of bus drum brakes. The CFD method works by involving a network of elements in a system called a mesh. In CFD, the mesh is a component that focuses on dividing the fluid domain into small elements to analyze fluid flow, heat transfer, and dynamic phenomena. Using a cooling process, the brake system temperature gradually decreased as the wind speed increased. The examination proved that natural air could reach the highest temperature of 168.73 °C and the lowest temperature of 63.01 °C. Meanwhile, forced air could reach the highest temperature of 73.8 °C and the lowest temperature of 30.73 °C. Statistical models and machine learning were carried out to predict the accuracy of simulation from SOLIDWORKS. The values of average temperature after the cooling process are examined by employing the Gradient Boosting algorithm with the highest accuracy of prediction (R2) value of 0.999895 in natural conditions and 0.999822 in forced conditions. Overall, forced air shows better temperature reduction than natural air. By lowering the operating temperature, drum brake systems can extend their lifespan.

  • DEVELOPMENT OF A MOBILE HYDRAULIC PRESS MACHINE USING FINITE ELEMENT ANALYSIS
    Agus Widyianto, Wahyu Arrozi, Yoga Guntur Sampurno, Paryanto Paryanto, Asri Widowati, Tien Aminatun, and Sunarta Sunarta
    Private Company Technology Center
    Mobile hydraulic press machines provide significant benefits in field-based applications such as construction, agriculture, and maintenance, all of which mobility and versatility are of utmost importance. The design and development of mobile hydraulic press machines are responsible for these advantages, which can be attributed to them. The primary focus of this study is to evaluate the structural performance of a mobile hydraulic press machine while it is subjected to operational loads. Formulation, modeling, and simulation of the machine are all carried out with the assistance of finite element analysis (FEA). Cutting-edge computer-aided design (CAD) technologies were applied to develop a model of the machine. This model was then analyzed to ascertain essential parameters such as the distribution of stress, the overall deformation, and the safety aspects. The data imply that the hydraulic telescopic cylinder, press machine frame, waste press, and waste press door all perform within an acceptable safety factor larger than two. In addition, the stress levels are lower than 550 MPa, and the deformation values vary from 0.20 mm to 0.40 mm, significantly lower than the standards for the material. When doing the safety factor analysis, it is essential to locate areas that could benefit from a slight strengthening to enhance the product's dependability and durability. In addition, the waste press section had an excessively planned safety margin, which indicated room for improvement in material optimization. The structural integrity of the machine is ensured by this all-encompassing approach, which also provides the machine's efficiency and versatility for various field applications. Future attempts to enhance the concept will focus on prototyping and testing

  • Effect of weaving speed on mechanical properties of stainless steel 316L pipe in orbital gas tungsten arc welding
    Eko Prasetyo, Ario Sunar Baskoro, and Agus Widyianto
    IOP Publishing
    Abstract This study uses 5G welding to weld GTAW orbital pipes without metal filler (autogenous) on SS316L stainless steel pipes. The test specimen is 3 mm thick and 114 mm wide. The test begins with welding specimen preparation. Orbital pipe welding is done counterclockwise with a 100A welding current, 1.4 mm/s welding speed, and three weaving speeds: 0.150, 0.154, and 0.161. Tensile tests were performed at 0°, 90°, 180°, and 270° with tension-type A&D RTF-2350 machines, while Vickers microhardness tests were only performed at 180°. The tensile test data shows that all fractures occur in the weld area, with the highest tensile strength at 571.07 MPa at 0.150 mm/s and 180° angular orientation. Weld metal (WM), heat-affected zone (HAZ), and base metal (BM) microhardness were examined. At 0.161 mm/s, the WM region had the highest average value of 148.47 HV, while the HAZ had 147.06 HV. Microhardness in the BM region is stable at all three weaving speeds from 164.98 to 169.36 HV. The maximum microhardness was 169.36 HV at 0.150 mm/s weaving speed. This study found that the higher the weaving speed, the tighter the weld pool produced and the higher the microhardness value in the WM and HAZ areas, but lower in the BM area.

  • Development and Implementation of a Chopper Machine to Improve the Quality of Chopped Grass for Sheep Feed in the Muhammadiyah Agribusiness Centre
    Rinasa Agistya Anugrah, Agus Widyianto, Mulyono, and Ferriawan Yudhanto
    EDP Sciences
    The Muhammadiyah Agribusiness Centre has a target of adding 100 sheep each year. The sheep cultivated here are owned by the congregation or residents entrusted with the principle of profit sharing. This centralized land has exceptional land for providing animal feed. This land is planted with various types of grass as the primary food for sheep. And so far, workers still chop manually without the help of machines. It can be done with the help of a grass-cutting machine to increase the capacity of chopping grass for animal feed. This research method involves design, manufacturing process, functional test, capacity of chopping, percentage of grass cutting length, performance test, fuel consumption test, noise test, and profit calculation of sheep farming. The result is that the fuel consumption of the chopping machine is 1.33 hours per liter with a constant engine speed of 3000 rpm. The best grass-chopping results are at 3000 rpm engine speed, and the best grass-chopping is odot grass with the best percentage of the grass-cutting length of 46%. However, at 3000 rpm, it produces the highest noise, 102.1 dB. And the net profit of sheep fattening is 513,750 rupiahs per sheep per month.

  • Experimental Study of Stack Porosity on the Performance of Thermoacoustic Refrigerator with Unparalleled Wire Mesh Stacks
    Rinasa Agistya Anugrah, Agus Widyianto, Sudarja Sudarja, and Muhammad Yusri Ismail
    Akademia Baru Publishing
    The effect of stack porosity on thermoacoustic refrigerator performance with different wire mesh stack designs is investigated experimentally in this paper. Thermoacoustic refrigeration is an innovative technique that employs the principles of thermodynamics and acoustics to achieve cooling effects without the need for hazardous refrigerants or mechanical components. Regardless of their potential, the wire mesh stacks' density and porosity are crucial characteristics that significantly impact the system's performance. The influence of three different types of wire mesh on the performance of thermoacoustic refrigerators was investigated in this study. The meshes used were #14, #16, and #18. The hydraulic radius, porosity, and clear opening differed for each variant. To determine which wire mesh structure was most effective in cooling, we tracked the changes in temperature in both the hot and cold heat exchangers. Based on the experimental results, it was observed that wire mesh #18 had a porosity of 72.6% and a hydraulic radius of 0.211 mm. This wire mesh demonstrated the most notable temperature reduction, decreasing by 4.8 °C and reaching a minimum temperature of 22.3 °C in the prototype model. The results indicate that thermoacoustic refrigerators can be improved with a larger porosity layout, leading to more noticeable temperature differences across the stack and better cooling efficiency. Findings from this study highlight the importance of optimizing parameters and designing stacks for sophisticated thermoacoustic refrigerator systems. These findings highlight the possible advantages of thermoacoustic refrigerators that use stacks of high-porosity wire mesh and give direction for future design considerations.

  • Prediction of weld quality of micro Friction Stir spot Welding (μFSSW) on similar materials AZ31B using fuzzy logic
    Agus Widyianto, Herminarto Sofyan, Gunadi Gunadi, Aan Yudianto, and Semuel Boron Membala
    AIP Publishing

  • The Taguchi and Response Surface Method for Optimizing Orbital Pipe Welding Parameters in Pulsed Current Gas Tungsten Arc Welding (PC-GTAW) for SS316L
    Ario Sunar Baskoro, Agus Widyianto, Eko Prasetyo, and Gandjar Kiswanto
    Springer Science and Business Media LLC

  • Investigation of Weld Geometry, Mechanical Properties, and Metallurgical observations of Activated Flux Tungsten Inert Gas (A-TIG) Welding on 304 Austenitic Stainless Steel
    Ario Sunar Baskoro, Mohammad Azwar Amat, Agus Widyianto, Andriawan Dwi Putra, and Sinatrya Azali Aryadhani
    Springer Science and Business Media LLC

  • Design of automatic tungsten inert gas (TIG) welding system using machine vision for AA1100 aluminum plate
    Yoga Dwi Adityaputra, Punta Singga Parasdya, Mohammad Azwar Amat, Agus Widyianto, and Ario Sunar Baskoro
    AIP Publishing

  • Metallurgical Characterization of Micro Friction Stir Spot Welding (μFSSW) Parameters on Similar Materials AA1100
    S B Membala, O S Sutresman, H Arsyad, M Syahid, and A Widyianto
    IOP Publishing
    Abstract The Micro Friction Stir Spot Welding (μFSSW) process is a metal plate welding technique with a relatively thin plate thickness. The advantages of this welding are the higher quality of the weld and the relatively low deformation. This study aimed to determine the effect of depth of penetration, dwell time, and tool geometry on the trend of material flow on the macro-structure of the welds produced in μFSSW technique using AA1100 thin aluminum plates. In this study, the parameters that are changed are the depth of the chisel, dwell time, and tool geometry. In this study, the parameters of the penetration depth were divided into 500 microns, dwell time was split into three lengths of time (300 ms, 500 ms, and 700 ms), and tool geometry was divided into two types of tool geometries (tool-1 and tool-2). In addition, the macro test was carried out to determine the depth of the weld, contour profile, and stretch macrostructure. The results of the macro test will be used to analyze the material flow relationship in each weld zone on the welding results of all existing parameters. Based on the results of the study, the effect of depth of penetration, dwell time, and tool geometry on the weld depth and metallography (hook width, hook height, and effective top sheet thickness) of welds using AA1100 thin plates is influential along with various tool geometries and the deeper the weld penetration and the longer stirring time, although the results are not always directly proportional.

  • DEVELOPMENT OF A FUZZY LOGIC MODEL FOR PREDICTING THE QUALITY OF MICRO FRICTION STIR SPOT WELDING (ΜFSSW) USING PARTICLE SWARM OPTIMIZATION
    Hairul Arsyad, Semuel Boron Membala, Agus Widyianto, Muhammad Syahid, Lukmanul Hakim Arma, Rudi Rudi, and Saiful Mangngenre
    Private Company Technology Center
    Micro Friction Stir Spot Welding (µFSSW) is crucial in microelectronics and precision manufacturing. It requires a comprehensive understanding of the complex connections between various parameters to achieve the highest quality welds. This study aims to improve the prediction of µFSSW weld quality by incorporating advanced optimization techniques. Fuzzy Logic Optimization is used to model uncertainties, and Particle Swarm Optimization (PSO) is employed to fine-tune parameters for improved accuracy. The fuzzy logic system utilizes Gaussian functions as membership functions, organized with nine rule bases. The results clearly demonstrate that the fuzzy logic model greatly enhances accuracy when combined with Particle Swarm Optimization. The refined model improves precision for pin diameter, shoulder diameter, Thermo-Mechanically Affected Zone (TMAZ) area, and cross-tensile strength. The PSO-optimized model shows lower accuracy in predicting plunge depth and shear tensile strength. The ongoing decline in Root Mean Square Error (RMSE) values highlights the complexity of the results. The optimization significantly improves the model’s ability to predict specific weld quality metrics, as demonstrated by the pin diameter’s reduced RMSE value of 0.07. The collective results showcase an optimized Fuzzy Logic System (FLS) model adept at accurately predicting µFSSW weld quality, demonstrating adaptability across diverse conditions. The discernible increase in accuracy, reaching up to 76 % following the optimization of the fuzzy logic model with PSO, serves as a testament to the efficacy of the employed methodologies in advancing the precision and reliability of µFSSW weld quality predictions

  • Effect of step increase in welding speed on top bead width and temperature of welding area using tungsten inert gas (TIG) welding machine on AA 1100 aluminum plate
    Ario Sunar Baskoro, Mohammad Azwar Amat, Punta Singga Parasdya, Yoga Dwi Adityaputra, and Agus Widyianto
    AIP Publishing

  • Performance and Emission Characteristics Using Dual Injection System of Gasoline and Ethanol
    Bambang Sulistyo, Herminarto Sofyan, Thomas Sukardi, and Agus Widyianto
    Universitas Muhammadiyah Magelang
    This study successfully investigated the engine performance and emission characteristics of a dual injection system that uses both gasoline and ethanol fuels. The study utilized a microcontroller-based control system (PGM-FI) to substitute ethanol fuel injection for gasoline injection. Ethanol fuel was injected at the inlet with three different pressures: 1.0 bar, 1.2 bar, and 1.4 bar, while gasoline injector pressure was fixed at 2 bar. Results showed that substituting ethanol injection with a pressure of 1 bar resulted in a slight decrease in torque and power, but it was the best compared to the other pressures tested. The study found that the use of ethanol injection resulted in improved fuel economy at an ethanol injector pressure of 1 bar with a reduction in SFC of 8.89%. Exhaust emissions were also reduced, with a maximum reduction in CO emissions of 42.54% occurring at a pressure of 1 bar. Similarly, the lowest HC content in exhaust gas was observed at a pressure of 1 bar, which was reduced by 44.48%. However, the results highlighted that ethanol injection pressure could significantly reduce fuel consumption for case A-04 and increase the air-fuel ratio.

  • The characteristics of efficacious leader in higher education: A literature review
    Ibnu Siswanto, Mingchang Wu, Hongbo Ma, Zainal Arifin, Moch Solikin, and Agus Widyianto
    Institute of Advanced Engineering and Science
    University is a remarkable institution which is always expected to change the world through its constantly innovative technology and science advancement and civilization promotion. Academic institution relies on its efficacious leader with vision and implementation to fully accomplish its missions. However, limited attention goes to this crucial leader’s requirements and characteristics, even faculty members in the higher education institutions studiously conduct research for external organizations. This paper presents a comprehensive analysis addressing innovative academic leader’s characteristics based on the current global situation, university mission, and unique culture. Finally, this article concluds the competencies and characteristics of efficacious academic leader demands in this changing era: envisioning the institutional future, integrating social resources with reciprocity, modeling the way with morality and integrity, executing university missions with professions and humanity, empowering team members with full support, and inspiring students with humanity. Those integrated characters could effectively guide faculty members for their future self-development, and contribute to achieving university mission on science development, producing high-quality human resources, and contributing of the human civilization promotion. This conclusion retrospectively raises further suggestions for future study, how faculty members build these characters considering the unique and complex situation of interpersonal and external factors within the university.

  • ENHANCING VEHICLE WHEEL SUSPENSION TEST EQUIPMENT THROUGH TAGUCHI METHOD FOR OPTIMIZATION
    Christof Geraldi Simon, Festo Andre Hardinsi, Sallolo Suluh, Formanto Paliling, Rigel Sampelolo, and Agus Widyianto
    Private Company Technology Center
    The study demonstrates a significant advancement in vehicle suspension testing by utilizing the Taguchi method for optimization. The suspension system determines a vehicle’s performance, directly affecting ride comfort, handling, and safety. The research presented in this study highlights a potentially effective method for enhancing suspension testing. The research systematically investigates the complex network of factors influencing suspension behavior using the Taguchi method, a robust optimization technique. The analysis includes examining road surface conditions, passenger weight variations, and tire pressure fluctuations. The objective is to design a suspension system that provides both comfort and stability without making any concessions, regardless of the obstacles encountered on the road. The car utilized for this research is an Altis sedan equipped with tires with a 205/55 R16 profile. The study’s findings indicate that factor A, which represents embankment height, significantly impacts 56 % of road irregularity management and the maintenance of a stable driving experience. The dynamic load factor (Factor D) contributes significantly to the vehicle’s overall stability and ride quality, accounting for 43 % in different scenarios. Based on the given framework, it can be observed that the variables B (tire pressure) and C (passenger weight) significantly influence suspension vibration, resulting in a reduction of below 0.1 %. While the research results presented here only cover a subset of automobiles, the methodology employed can be used to deal with similar problems in other vehicles.

  • IDENTIFYING THE INFLUENCE OF ORBITAL PIPE WELDING PARAMETERS ON MECHANICAL PROPERTIES USING SS316L PIPE
    Eko Prasetyo, Ario Sunar Baskoro, Agus Widyianto, and Gandjar Kiswanto
    Private Company Technology Center
    Pipeline systems play a pivotal role across various industries, serving as the lifelines for transporting materials like oil, water, and gas. Among the welding techniques, orbital pipe welding, particularly Gas Tungsten Arc Welding (GTAW) without filler metal, is the fitting method for joining these critical piping systems. This study examined orbital pipe welding on SS316L pipes with a 114-mm outer diameter and 3-mm thickness. The main goal was to evaluate the weld's tensile strength and microhardness carefully. Constant current and three welding speeds – 1.3, 1.4, and 1.5 mm/s – achieved this goal. In addition, welding experiments covered 0°, 90°, 180°, and 270° pipe positions. First, the necessary tools and test objects were prepared, and then the test materials were welded. The final phase was testing tensile strength and microhardness. This investigation used a 5G-specific prototype orbital pipe welding equipment. The 5G method requires horizontal welding with the vertical pipe axis. The study used ASTM E-8M-compliant standardized test material for precise and repeatable tensile strength measurements. This standardization ensured outcomes reliability. One of the significant findings was that 1.4 mm/s welding at the 270° pipe position with 110A current produced the maximum tensile strength. This shows that these conditions are best for welding SS316L-type stainless steel pipes with an outside diameter of 114 mm and a thickness of 3 mm. Strangely, microhardness testing showed that horizontal distribution welding quality decreased at 1.4 mm/s. This implies that further experimentation may be needed to fine-tune the welding parameters to optimize the process and achieve superior microhardness values.

  • EVALUATION OF A BIOMASS COMBUSTION FURNACE USING DIFFERENT KINDS OF COMBUSTION CHAMBER CASING MATERIALS
    Sallolo Suluh, Dennis Lorenza, Rigel Sampelolo, GAN Pongdatu, Dina Ramba, and Agus Widyianto
    Private Company Technology Center
    This research systematically evaluates a biomass combustion furnace, focusing on the influence of varying combustion chamber casing materials. The study employs controlled laboratory experiments to investigate the impact of different casing materials on combustion performance, thermal efficiency, and practical applications such as water boiling capacity. The research uses distinct materials, including clay, steel, and aluminum, for combustion chamber casings while maintaining consistent dimensions. The central experimental apparatus, an aluminum stove, was meticulously crafted, adhering to precise measurements. Coconut shell briquettes served as the primary fuel source for this investigation. The results reveal intriguing dynamics in combustion behavior. Notably, the choice of combustion chamber casing material significantly affects fire temperature, sleeve wall temperature, thermal efficiency, and the ability to boil water. Clay emerges as a standout performer, achieving high thermal efficiency (56.8 %), substantial water boiling capacity (25 liters), and efficient fuel consumption (1.28 kg of burnt briquettes). However, steel casing materials excel in generating the highest fire temperatures (up to 557 °C), underscoring their exceptional heat-conducting properties. Aluminum has fast temperature responses but may not retain heat like clay. The findings help optimize biomass combustion furnaces and associated applications. Material selection is crucial to attaining combustion goals like efficiency, temperature generation, or practical heat. These discoveries could lead to more efficient and ecologically friendly biomass combustion systems for sustainable energy and resource use

  • SEALING EFFECT ON CORROSION RESISTANCE OF BORIC SULFURIC ACID ANODIZING ON AA2024
    Muhammad Zuchry, Ilyas Renreng, Hairul Arsyad, Lukmanul Hakim Arma, and Agus Widyianto
    Private Company Technology Center
    Aluminum is widely used due to its excellent properties, lightweight and thermal conductivity. However, when used in aircraft applications, it can cause corrosion and sticking, compromising safety. To address this issue, anodizing is used to improve aluminum's corrosion resistance and adhesion. In this study, the AA2024 material was anodized using the boron-sulfuric acid anodization (BSAA) process, followed by a sealing process using acetic acid. This sealing process forms an oxide layer on the aluminum's surface, which reduces the corrosion rate. The study investigated the effects of anodization voltage and time on the results of BSAA anodization through quantitative and qualitative measurements, including corrosion resistance, potentiodynamic polarization, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The results showed that samples anodized with a gasket could reduce the corrosion rate by up to 85 % compared to those without a gasket and substrate. The most significant reduction in corrosion rates occurred at an anodization voltage of 10 V and an anodization time of 15 min. The potentiodynamic test results indicated that the Tafel plot during sealing lies in the cathodic region where the corrosion current density decreases with increasing voltage. SEM observations revealed that the anodizing process could provide an oxide layer on the samples' surface, while the sealing process creates a smooth surface. EDS analysis showed that an oxide compound was formed in an oxide bond state after the sample surface was subjected to the sealing treatment. Overall, the study demonstrates the effectiveness of BSAA anodization in improving corrosion resistance and highlights the importance of considering the anodization parameters

  • Optimization of PD Controller Using ACO for the Trajectory Tracking of a Ship-Mounted Two-DoF Manipulator System
    Agus Widyianto, Edwar Yazid, Midriem Mirdanies, Rizqi Andry Ardiansyah, Rahmat, and Mohamad Luthfi Ramadiansyah
    IEEE
    A ship-mounted two-DoF manipulator is a very important water vehicle for coastal surveillance, and its operation is highly influenced by ocean waves. This paper proposes genetic algorithm (GA) and ant colony optimization (ACO) based PD controller to compensate the ship motions by tuning the gain values. Efficacy of proposed controller is not only highlighted using simulations but also through real-time experiments either without or with ship motions. The optimal gains obtained are Kp = 0.12442 and Kd = 0.023303 for ZN-PDC, Kp = 0.37227 and Kd = 0.021231 for GA-PDC while Kp = 0.39164 and Kd = 0.024367 for ACO-PDC. When the ACO-PDC is tested in a slight and very rough sea state, the resulting rise times are 0.3594s and 0.3781s, respectively. Meanwhile, the steady state is 4.9819 and 16.5638, respectively. Finding results show that ACO-PDC can compensate the ship motions better than Ziegler-Nichols PDC (ZN-PDC) and GA-PDC in terms of rise time, overshoot, and steady-state error values.

  • SUPPRESSION OF CORROSION ON STAINLESS STEEL 303 WITH AUTOMATIC IMPRESSED CURRENT CATHODIC PROTECTION (A-ICCP) METHOD IN SIMULATED SEAWATER
    Hamsir Hamsir, Onny Sutresman, Hairul Arsyad, Muhammad Syahid, and Agus Widyianto
    Private Company Technology Center
    One effective method to slow down metal corrosion rate is the impressed current cathodic protection (ICCP) system. The ICCP system is suitable for coastal applications such as piping systems and offshore structures. In this application, metal surfaces tend to be exposed to seawater. Specific concentrations of seawater can accelerate the occurrence of corrosion of metals, even though they are stainless steel types. This study applied the automatic ICCP system to stainless steel 303. Stainless steel 303 will be immersed in simulated seawater at several concentrations of NaCl (27 ppt, 31 ppt, and 35 ppt). The specimens were immersed in NaCl solution for three weeks or about 504 hours at a constant temperature of 38 °C. After the sample has been soaked, quantitative and qualitative measurements were carried out. Quantitative measures include average weight loss, corrosion rate, and potential value. At the same time, the qualitative measurements include macroscopic, Scanning Electron Microscopy (SEM), and Energy Dispersive X-Ray Spectroscopy (EDS). Based on quantitative measures, it was found that the difference in average weight loss and corrosion rate for each NaCl concentration was not very significant. The difference of each parameter is less than 0.1 % and 0.22 %, respectively. The potential value quickly reaches a steady state at NaCl concentrations of 27 ppt and 31 ppt in less than 10 seconds. The results of the SEM test showed a change in the metal structure. The oxygen (O) content in the metal after the EDS test showed a decrease in this element up to 35 % at a NaCl concentration of 35 ppt. The decrease in oxygen (O) can slow down the corrosion rate in metals when exposed to seawater.

  • Numerical Modelling and Analysis of Externally Blown Heated Pipes Applicable for Furnace
    Muhkamad Wakid, Aan Yudianto, and Agus Widyianto
    Akademia Baru Publishing
    The heat transfer system of the pipe for furnace application was newly introduced and need to be analyzed. The study aims to numerically model and investigate the externally blown heated pipe for furnace. The furnace itself is the heat source for briquette production inside the oven. The investigation includes the analysis of temperature, air flow velocity and also pressure inside the pipes. The investigation employed the Computational Fluid Dynamics methodology for numerically analysis the intended results. Three cases were introduced in this study, having differences in the air intake velocity which was set to 5 m/s (case 1), 3 m/s (case 2) and 1 m/s (case 3). The main objective is to have the highest outlet temperature to be blown in the heating chamber. Case 1 results in the lowest resulting temperature which only 77 , while case 3 yields in the highest output temperature more than 100 . In terms of velocity, it is clear that the highest velocity intake affects also in the increasing value of the velocity inside the pipe. Case 1 results in maximum of 35 m/s air velocity. The pressure distribution also results in the similar trend. The case 1 yields in the maximum pressure of 650 Pa and case 3 produce the pressure nearly zero. However, case 3 results in the highest temperature for furnace to be blown in the heating chamber of the oven system.

  • INDENTIFYING THE EFFECT OF MICRO FRICTION STIR SPOT WELDING (μFSSW) PARAMETERS ON WELD GEOMETRY, MECHANICAL PROPERTIES, AND METALLOGRAPHY ON DISSIMILAR MATERIALS OF AZ31B AND AA1100
    Semuel Boron Membala, Onny Sutyono Sutresman, Hairul Arsyad, Muhammad Syahid, and Agus Widyianto
    Private Company Technology Center
    Micro-friction stir spot welding (µFSSW) is one type of welding that is suitable for joining lightweight materials. One of the challenges in joining lightweight materials with µFSSW is that the material is easily perforated, or the join is not strong enough, so it is necessary to select the right µFSSW parameters. In this article discusses about investigates the micro-Friction Stir Spot Welding (µFSSW) parameters on weld geometry, mechanical properties, and metallography on dissimilar materials of AZ31B and AA1100. The material thickness of the AZ31B and AA100 is 0.5 mm and 0.32 mm, respectively. The µFSSW tool is made of high-speed steel (HSS) with a pin diameter of 0.25 mm and a shoulder diameter of 0.5 mm. The constant process parameters of the µFSSW joint used, i. e., plunge depth, dwell time plunge rate, and high tool rotational speed of 33,000 rpm. Welding test results include weld geometry, mechanical properties, and metallography. Weld geometry testing to determine the weld nugget diameter. The mechanical properties test was shear tensile test and cross tensile test, while the metallographic test included macrostructure and microstructure observations. The results of the FSSW weld geometry show that at a dwell time of 700 milliseconds and a plunge depth of 600 microns, the weld pin diameter and weld shoulder diameter are close to the pin diameter and the diameter of the shoulder tool used. Dwell time and plunge depth has a significant effect on tensile strength. The maximum shear and cross loads achieved were 387±17 N and 29±2 N, respectively. Intermetallic compounds (IMC) are observed at the interface of the two materials, while a dwell time of 700 milliseconds give the effect of cracks on the inside of the weld

  • Investigation on Weld Characteristic, Welding Position, Microstructure, and Mechanical Properties in Orbital Pulse Current Gas Tungsten Arc Welding of AISI 304L Stainless Steel Pipe
    Agus Widyianto, Ario Sunar Baskoro, and Gandjar Kiswanto
    International Journal of Technology
    . Orbital pipe welding is carried out in this study by Pulse Current Gas Tungsten Arc Welding (PC-GTAW) without metal filler (autogenous) of AISI 304L stainless steel pipe. The dimensions of the specimen are 114 mm outside diameter and the thickness of 3 mm. This study investigates the effect of pulse current parameters, weld position, and pulse width on the characteristics of weld geometry, mechanical properties, and microstructure. The welding method used in this study is the continuous current and pulse current. The mean current of each parameter is the same at 100 ± 0.5 Amperes, but in the pulse current, there are variations in peak current, base current, peak current time, and the base current time. The welding speed used is constant at 1.4 mm/s. The result of weld geometry on the outside of pipe has shown that the flat (0°) position is concave and the overhead (180°) position is convex due to the influence of gravity. The microstructure indicates that the fine cellular dendritic structures appear at PC-GTAW. The PC-GTAW can produce good mechanical properties such as the tensile strength and the micro-hardness. The tensile strength of the specimen is reduced 14.23 % from the base metal at parameter 65-B and the flat position.

  • Weld geometry, mechanical properties, microstructure and chemical composition of aa6063 in tungsten inert gas welding with intermittent controlled wire feeding method
    Ario Sunar Baskoro, Mohammad Azwar Amat, Serafina Purti D. Simatupang, Yala Abrara, and Agus Widyianto
    MDPI AG
    In this study, AA 6063 aluminum was joined using Tungsten Inert Gas (TIG) welding with a butt joint. The ER-5356 filler metal feeding method is used intermittently to find its effect on weld geometry, mechanical properties, microstructure, and chemical composition. The dimensions of the specimens used in this study were 120 mm × 50 mm, with a thickness of 3 mm. The ratio used is the configuration of the feed time and delay time. The length ratio of wire filler is varied from a ratio of 4 to 6. The top bead width and back bead width decreased by 17.66% and 40.33%, respectively. At a ratio of 6, it has the largest cross-sectional area of 295.37 ± 27.60 mm2. The results show that the general tensile strength was proportional to the ratio, but the difference was not significant, only around ±8 MPa. The microstructure formed in each weld has different characteristics; conversely, grains with a relatively coarse structure have decreased hardness values. The chemical composition test shows that the length ratio of filler metal feed directly correlates with magnesium’s average weight content, where the weight content of magnesium value tends to be homogeneous in all areas of weld metal (WM).


RECENT SCHOLAR PUBLICATIONS

  • Effect of weaving speed on mechanical properties of stainless steel 316L pipe in orbital gas tungsten arc welding
    E Prasetyo, AS Baskoro, A Widyianto
    Journal of Physics: Conference Series 2972 (1), 012059 2025

  • DEVELOPMENT OF A MOBILE HYDRAULIC PRESS MACHINE USING FINITE ELEMENT ANALYSIS.
    A Widyianto, W Arrozi, YG Sampurno, P Paryanto, A Widowati, ...
    Eastern-European Journal of Enterprise Technologies 133 (7) 2025

  • Development of Filament Dryer for Drying Process of 3D Printing Filament in Open Storage Condition
    A Widyianto
     2025

  • Peningkatan Produktivitas dan Efisiensi UMKM Kelorida melalui Penggunaan Mesin Penepung Daun Kelor
    A Widyianto, OA Hidayat, RRLRNP Maira
    BERNAS: Jurnal Pengabdian Kepada Masyarakat 6 (1), 501-509 2025

  • Design and Analysis of Orbital Pipe Welding Prototype for Piping System Welding Applications
    A Widyianto, AS Baskoro, G Kiswanto
    Journal of Automotive and Mechanical Applied Technology 1 (1), 11-23 2024

  • Prediction of weld quality of micro Friction Stir spot Welding (FSSW) on similar materials AZ31B using fuzzy logic
    A Widyianto, H Sofyan, G Gunadi, A Yudianto, SB Membala
    AIP Conference Proceedings 3145 (1) 2024

  • Karakteristik Panas pada Exhaust manifold dengan Variasi Putaran Mesin menggunakan Computational Fluid Dynamics
    M Wakid, A Widyianto, A Widowati
    Jurnal Pendidikan Vokasi Otomotif 6 (2), 51-70 2024

  • The taguchi and response surface method for optimizing orbital pipe welding parameters in pulsed current gas tungsten arc welding (PC-GTAW) for SS316L
    AS Baskoro, A Widyianto, E Prasetyo, G Kiswanto
    Transactions of the Indian Institute of Metals 77 (6), 1607-1620 2024

  • Metallurgical Characterization of Micro Friction Stir Spot Welding (μFSSW) Parameters on Similar Materials AA1100
    SB Membala, OS Sutresman, H Arsyad, M Syahid, A Widyianto
    Journal of Physics: Conference Series 2739 (1), 012043 2024

  • Investigation of weld geometry, mechanical properties, and metallurgical observations of activated flux tungsten inert gas (A-TIG) welding on 304 austenitic stainless steel
    AS Baskoro, MA Amat, A Widyianto, AD Putra, SA Aryadhani
    Transactions of the Indian Institute of Metals 77 (3), 897-906 2024

  • Design of automatic tungsten inert gas (TIG) welding system using machine vision for AA1100 aluminum plate
    YD Adityaputra, PS Parasdya, MA Amat, A Widyianto, AS Baskoro
    AIP Conference Proceedings 2710 (1) 2024

  • DEVELOPMENT OF A FUZZY LOGIC MODEL FOR PREDICTING THE QUALITY OF MICRO FRICTION STIR SPOT WELDING (ΜFSSW) USING PARTICLE SWARM OPTIMIZATION.
    H Arsyad, SB Membala, A Widyianto, M Syahid, LH Arma, S Mangngenre
    Eastern-European Journal of Enterprise Technologies 127 (3) 2024

  • Development and Implementation of a Chopper Machine to Improve the Quality of Chopped Grass for Sheep Feed in the Muhammadiyah Agribusiness Centre
    RA Anugrah, A Widyianto, M Mulyono, F Yudhanto
    BIO Web of Conferences 137, 01013 2024

  • Evaluation of a biomass combustion furnace using different kinds of combustion chamber casing materials
    S Suluh, D Lorenza, R Sampelolo, GAN Pongdatu, D Ramba, A Widyianto
    Eastern-European Journal of Enterprise Technologie 5 (8), 7-15 2023

  • Effect of step increase in welding speed on top bead width and temperature of welding area using tungsten inert gas (TIG) welding machine on AA 1100 aluminum plate
    AS Baskoro, MA Amat, PS Parasdya, YD Adityaputra, A Widyianto
    AIP Conference Proceedings 2837 (1) 2023

  • IDENTIFYING THE INFLUENCE OF ORBITAL PIPE WELDING PARAMETERS ON MECHANICAL PROPERTIES USING SS316L PIPE.
    E Prasetyo, AS Baskoro, A Widyianto
    Eastern-European Journal of Enterprise Technologies 125 (12) 2023

  • KARAKTERISASI KUALITAS LASAN PADA BAHAN SERUPA AZ31B DENGAN PROSES MICRO-FRICTION STIR SPOT WELDING (FSSW) UNTUK APLIKASI KENDARAAN
    A Widyianto, A Yudianto, H Sofyan, G Gunadi
    Jurnal Pendidikan Vokasi Otomotif 5 (2), 101-118 2023

  • Performance and Emission Characteristics Using Dual Injection System of Gasoline and Ethanol
    B Sulistyo, H Sofyan, T Sukardi, A Widyianto
    Automotive Experiences 6 (2), 245-258 2023

  • SEALING EFFECT ON CORROSION RESISTANCE OF BORIC SULFURIC ACID ANODIZING ON AA2024.
    M Zuchry, I Renreng, H Arsyad, LH Arma, A Widyianto
    Eastern-European Journal of Enterprise Technologies 122 (6) 2023

  • The characteristics of efficacious leader in higher education: A literature review
    I Siswanto, M Wu, H Ma, Z Arifin, M Solikin, A Widyianto
    Journal of Education and Learning (EduLearn) 17 (1), 145-157 2023

MOST CITED SCHOLAR PUBLICATIONS

  • Optimization of gas metal arc welding (GMAW) parameters for minimum distortion of T welded joints of A36 mild steel by Taguchi method
    AS Baskoro, R Hidayat, A Widyianto, MA Amat, DU Putra
    Materials Science Forum 1000, 356-363 2020
    Citations: 16

  • Effect of pulse currents on weld geometry and angular distortion in pulsed GTAW of 304 stainless steel butt joint
    A Widyianto, AS Baskoro, G Kiswanto
    International Journal of Automotive and Mechanical Engineering 17 (1), 7687-7694 2020
    Citations: 14

  • Investigation of temperature history, porosity and fracture mode on aa1100 using the controlled intermittent wire feeder method
    S Baskoro, A Amat, D Putra, A Widyianto, Y Abrara
    Transdisciplinary Research and Education Center for Green Technologies 2020
    Citations: 14

  • Effect of welding sequence and welding current on distortion, mechanical properties and metallurgical observations of orbital pipe welding on SS 316L
    A Widyianto, AS Baskoro, G Kiswanto, MFG Ganeswara
    Eastern-European Journal of Enterprise Technologies 2 (12), 110 2021
    Citations: 13

  • Effect of welding current and welding speed on weld geometry and distortion in TIG welding of A36 mild steel pipe with V-groove joint
    M Panji, AS Baskoro, A Widyianto
    IOP Conference Series: Materials Science and Engineering 694 (1), 012026 2019
    Citations: 11

  • The characteristics of efficacious leader in higher education: A literature review
    I Siswanto, M Wu, H Ma, Z Arifin, M Solikin, A Widyianto
    Journal of Education and Learning (EduLearn) 17 (1), 145-157 2023
    Citations: 10

  • Analisis pengaruh arus pengerasan dan kecepatan pengelasan terhadap lebar manik las dan distorsi pada pengelasan gas metal arc welding (GMAW) dengan sambungan tumpul SS 304
    AS Baskoro, DRB Prasetya, A Widyianto
    Jurnal Teknik Mesin Indonesia 14 (2), 52-57 2019
    Citations: 9

  • Investigation on weld characteristic, welding position, microstructure, and mechanical properties in orbital pulse current gas tungsten arc welding of AISI 304L stainless steel
    A Widyianto, AS Baskoro, G Kiswanto
    International Journal of Technology 13 (3), 473-483 2022
    Citations: 8

  • Pelatihan Pembelajaran Dalam Konsep Kurikulum Merdeka Belajar Dan Teknologi Mobil Listrik Di SMK Negeri 1 Ngawen Gunungkidul
    A Yudianto, H Sofyan, A Widyianto
    BERNAS: Jurnal Pengabdian Kepada Masyarakat 3 (4), 709-715 2022
    Citations: 7

  • The taguchi and response surface method for optimizing orbital pipe welding parameters in pulsed current gas tungsten arc welding (PC-GTAW) for SS316L
    AS Baskoro, A Widyianto, E Prasetyo, G Kiswanto
    Transactions of the Indian Institute of Metals 77 (6), 1607-1620 2024
    Citations: 5

  • Performance and Emission Characteristics Using Dual Injection System of Gasoline and Ethanol
    B Sulistyo, H Sofyan, T Sukardi, A Widyianto
    Automotive Experiences 6 (2), 245-258 2023
    Citations: 5

  • Analisis pengaruh arus pengelasan dan urutan pengelasan pada pengelasan pipa orbital terhadap lebar manik las dan distorsi pada pipa baja tahan karat 316L
    A Widyianto, AS Baskoro, G Kiswanto, MF Ginanjar
    Jurnal Teknik Mesin Indonesia 16 (1), 52-60 2021
    Citations: 5

  • Pengaruh Penggunaan media pembelajaran interaktif berbasis macromedia flash 8 terhadap hasil belajar siswa kelas XI pada mata pelajaran sistem pengisian di SMK Negeri 1 Magelang
    A Widyianto
    Skripsi Program Studi Pendidikan Teknik Otomotif Fakultas Teknik Universitas 2016
    Citations: 5

  • Weld geometry, mechanical properties, microstructure and chemical composition of aa6063 in tungsten inert gas welding with intermittent controlled wire feeding method
    AS Baskoro, MA Amat, SPD Simatupang, Y Abrara, A Widyianto
    Metals 11 (2), 316 2021
    Citations: 4

  • Controlling the width of weld bead from the weld pool using machine vision and artificial neural network
    AS Baskoro, DA Purwanto, A Widyianto
    MATEC Web of Conferences 269, 04003 2019
    Citations: 4

  • IDENTIFYING THE INFLUENCE OF ORBITAL PIPE WELDING PARAMETERS ON MECHANICAL PROPERTIES USING SS316L PIPE.
    E Prasetyo, AS Baskoro, A Widyianto
    Eastern-European Journal of Enterprise Technologies 125 (12) 2023
    Citations: 3

  • Enhancing vehicle wheel suspension test equipment through Taguchi method for optimization
    S Simon, D Lorenza, R Sampelolo, GAN Pongdatu, A Widyianto
    Eastern-European Journal of Enterprise Technologie 5 (1), 15-27 2023
    Citations: 3

  • Suppression of corrosion on stainless steel 303 with automatic impressed current cathodic protection (a-ICCP) method in simulated seawater
    Hamsir, O Sutresman, H Arsyad, M Syahid, A Widyianto
    Eastern-European Journal of Enterprise Technologies 6 (12), 120 2022
    Citations: 3

  • Indentifying the effect of micro friction stir spot welding (FSSW) parameters on weld geometry, mechanical properties, and metallography on dissimilar materials of AZ31B and
    SB Membala, OS Sutresman, H Arsyad, M Syahid, A Widyianto
    Eastern-European Journal of Enterprise Technologies 4 (12), 118 2022
    Citations: 3

  • Investigation of weld geometry, mechanical properties, and metallurgical observations of activated flux tungsten inert gas (A-TIG) welding on 304 austenitic stainless steel
    AS Baskoro, MA Amat, A Widyianto, AD Putra, SA Aryadhani
    Transactions of the Indian Institute of Metals 77 (3), 897-906 2024
    Citations: 2