Effects of phenolic microballoon/epoxy fills on flexural and block-shear performance of thin aramid honeycomb-core CFRP sandwich panels Ardy Lololau, Herry Purnomo, Arif Nur Hakim, Muhamad H. Setianto, Mahfud Ibadi, Arif Rachman Hakim, Muhammad Awwaluddin Materials Today Communications, 2026 This study investigates the mechanical performance of thin CFRP/aramid honeycomb sandwich panels (total thickness 3–6 mm) filled with phenolic microballoon/epoxy syntactic foam, with a specific focus on the effect of manufacturing route. Three configurations were fabricated and characterized: unfilled baseline, in-situ co-cured fill, and pre-filled with secondary bonding. Three-point flexural and punch block-shear tests were conducted, with results normalized by specimen mass to enable weight-efficiency comparisons. In-situ co-curing yielded superior performance, achieving a flexural strength of 222.43 MPa and block-shear strength of 32.03 MPa — representing 5.8-fold and 1.7-fold improvements over the unfilled baseline, respectively. Thickness-normalized stiffness analysis confirmed a genuine 27% intrinsic rigidity gain, independent of geometric thickness effects. Fractography revealed a transition from core-dominated buckling to tensile face-sheet fracture in in-situ co-cured filled panel, indicating full sandwich beam engagement. Pre-filled panel underperformed the unfilled baseline in block-shear, attributed to approximately 26.7% excess porosity arising from unconstrained room-temperature cure and poor secondary bond quality. These findings establish in-situ co-curing as the critical processing parameter for thin syntactic foam-cored sandwich panels in lightweight aerospace structural applications.
Corrosion Characteristics of Ferritic Stainless Steel: Effects of Heating Holding Time and Bending Angle Sri Hastuty, Rizky Bagus Eka Sugiharto, Diva Dwira Permana, Muhammad Awwaluddin, Farah Farhana Zainal Journal of Physics Conference Series, 2026 This study investigates the influence of chloride ion concentration and thermal-mechanical treatments on intergranular corrosion (IGC) and stress corrosion cracking (SCC) in austenitic stainless steel 201. Heat treatment involved annealing at 1000°C for 60 minutes, followed by sensitization at 700°C with varied holding times (90, 120, and 150 minutes). Mechanical deformation was introduced through bending tests at 0°, 90°, and 180° angles. Electrochemical corrosion behavior was analyzed using open-circuit potential (OCP) and Tafel polarization curves in 3.5 wt% NaCl solution, while microstructural changes were characterized using optical microscopy and Scanning Electron Microscopy (SEM). Results showed that both increased holding time and bending angle led to greater chromium-carbide precipitation along grain boundaries, thereby intensifying IGC and promoting deeper, longer SCC cracks. The corrosion potential (Ecorr) became more negative, and corrosion current density (Icorr) increased, confirming a rise in corrosion rate. This comprehensive approach provides insights into the mechanisms of material degradation in chloride-rich environments and guides industrial strategies to mitigate corrosion in piping systems.
Simulation and Experimental Validation of Stress Analysis for Train Coupler Makmuri Nuramin, Anwar, Rohadi S. B. Utomo, Djoko W. Karmiadji, Budi Haryanto, Yudi Irawadi, Budi Prasetiyo, Akhmad Sarif, Arga A. Nugroho, Muchamad Gozali, Indra H. Mulyowardono, Muhammad Awwaluddin, Hedi Purnomo Tikrit Journal of Engineering Sciences, 2025 This study investigates the stress distribution in a sand-cast steel train coupler by comparing experimental results with FEM simulation. Strain gauges were attached to the coupler body areas to measure stresses under varying loads ranging from 500 kN to 1900 kN. The results indicated that the experimental and simulation stress values exhibited a linear relationship with increasing load, reaching a maximum of 206 MPa at 1900 kN. This stress value was approximately 30% of the material's yield strength. However, the experimental stress values tended to be slightly higher than the simulated results, with an average difference of less than 10%. This deviation is attributed to casting defects, geometric irregularities, and material-property differences that are difficult to capture in simulations. The specimen's chemical composition aligns with the Association of American Railroads (AAR) M201 Grade E Steel Casting standards, ensuring the material meets industry requirements. The findings suggest that optimizing the post-casting machining process could improve accuracy in future FEM analyses.
Analysis and Characterization of Fe-Cr-Al Alloy Variation of Time Process by Mechanical Alloying Method Kusdi Priyono, Fajar, Agus Sujatno, Muhammad Awwaluddin Aip Conference Proceedings, 2024 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Kusdi Priyono, Fajar, Agus Sujatno, Muhammad Awwaluddin; Analysis and characterization of Fe-Cr-Al alloy variation of time process by mechanical alloying method. AIP Conf. Proc. 4 June 2024; 3103 (1): 020009. https://doi.org/10.1063/5.0201521 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Stress Corrosion Cracking of Brass in Chloride Solution Sri Hastuty, Yeshaya Armani Ramadhan, Fatwa Khoirrun Nadhor, Muhammad Awwaluddin, Farid Triawan, Faisal Mahmuddin Solid State Phenomena, 2024 In this investigation, the resistance of brass material to stress corrosion cracking (SCC) in a chloride solution was assessed through adjustments in temperature (25°C, 35°C, and 45°C) and bending angles of the brass material (1.0 wt%, 2.0 wt%, and 3.5 wt%). The chosen solution closely resembles saltwater, making it suitable for testing, especially considering the widespread use of brass materials in various industrial sectors, particularly shipping. Stress corrosion cracking tends to impact brass materials under heavy loading. The primary objective of this study is to characterize the corrosion rate of brass materials. The method involved a bending test with angle variations of 180°, 90°, and 0°. Corrosion assessment utilized the Open Circuit Potential method, Anodic Polarization Tafel, and a digital microscope for the material's microstructure properties. According to the findings, brass material exhibits the lowest corrosion rate (10 x 10-6 mmpy) at a temperature of 25°C distilled water and an angle variation of 0°. Conversely, the corrosion rate increases with variations in bending angle, temperature, and the concentration of NaCl solution, as evidenced by the corrosion rate of 28.035 x 10-5 mmpy with an angle variation of 180°, to a corrosive solution of NaCl 3.5 wt% at a temperature of 45°C.
Effect of Yttrium on corrosion resistance of Zr-based alloys in Ringer’s lactate solution for biomaterial applications Muhammad Awwaluddin, Sri Hastuty, Djoko Hadi Prajitno, Makmuri, Budi Prasetiyo, Yudi Irawadi, Jekki Hendrawan, Harry Purnama, Eko Agus Nugroho Aims Materials Science, 2024 <abstract> <p>In this study, several types of zirconium-based alloys supplemented with 2, 3, and 4, in wt.% of yttrium for corrosion resistance enhancement were investigated. The specimens were prepared by a single arc welding furnace in an argon-controlled atmosphere. By optical and scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and electrochemical tests, the effect of different portions of yttrium on the surface morphology, phase structure, and corrosion resistance in the Zr alloys were analyzed. As of result of arc welding, the specimens were obtained and examined by optical microscope and then homogenous structures were observed. These structures are matrix (Zr-rich) and oxides. Furthermore, as of the characterization results by X-ray diffraction, the main compound of the alloys was Zr6Mo6AlTi, while others were AlZr<sub>3</sub>, MoO<sub>2,</sub> ZrO<sub>2</sub>, and Y<sub>2</sub>O<sub>3</sub> oxides. Yttrium addition in the alloys prior to the corrosion test led to thickened grain boundaries but reduced grain size. The Y<sub>2</sub>O<sub>3</sub> itself remained at the grain boundaries as clusters. The corrosion test was performed in Ringer's lactate solution by using anodic polarization. The effect of yttrium addition into Zr-based alloys was found to be beneficial by shifting the corrosion potential toward a positive value. Zr-6Mo-6Al-Ti-4Y had a higher open corrosion potential value than the other two alloys. The difference was approximately 200 mV. However, the passive region of Zr-6Mo-6Al-Ti-4Y was the shortest and broke down at an earlier stage. The formation of these kinds of oxides was the reason for the increase in corrosion potential of Zr-based alloys with 4% Y added.</p> </abstract>
Corrosion Behavior of Hastelloy C-276 in Hydrochloric and Sulfuric Acid Sri Hastuty, Anang Widiatmoko, Toto Sudiro, Muhammad Awwaluddin, Poppy Puspitasari Key Engineering Materials, 2023 This research was conducted to determine the corrosion rate by varying the concentration of the solution against hydrochloric acid and sulfuric acid. The method used is open circuit potential (OCP) and Tafel plot. Based on the research conducted, Hastelloy C-276 was more prone to get oxidized in sulfuric acid rather than hydrochloric acid. It can be seen from the OCP value of sulfuric acid was much more negative than that of hydrochloric acid as of-1.5 V for 0.5 M sulfuric acid and-0.2 V for hydrochloric acid. The corrosion rate of Hastelloy C-276 in sulfuric acid was also higher compared to same alloy in hydrochloric acid. At the most concentrated solution, 0.5 M, the corrosion rate of sulfuric acid reached 0.39 mmpy and as for corrosion cate in hydrochloric acid, only at 0.16 mmpy. It is thought that there was a difference of passive film composition for both solutions. Keywords: Hastelloy C-276, Corrosion, Hydrochloric acid, Sulfuric acid.
Corrosion Characteristics of Ferritic Stainless Steel: Effects of Heating Holding Time and Bending Angle S Hastuty, RBE Sugiharto, DD Permana, M Awwaluddin, FF Zainal Journal of Physics: Conference Series 3186 (1), 012069 , 2026 2026
Simulation and Experimental Validation of Stress Analysis for Train Coupler M Nuramin, RSB Utomo, DW Karmiadji, B Haryanto, Y Irawadi, ... Tikrit Journal of Engineering Sciences 32 (4), 1-12 , 2025 2025
Stress Corrosion Cracking of Brass in Chloride Solution S Hastuty, YA Ramadhan, FK Nadhor, M Awwaluddin, F Triawan, ... Solid State Phenomena 368, 93-104 , 2024 2024
Review of Internet of Things System on Atmospheric Corrosion Monitoring M Awwaludin, S Hastuty, A Sarif, M Perkasa, MH Paturahman, ... Proceeding of International Conference on Information Science and Technology … , 2024 2024
Feasibility study of welding wire for low carbon welding on heavy equipment components based on welding strength and microstructure analysis DY Al-Ayubi, S Hastuty, M Awwaluddin, FF Zainal, N Rahmawan AIP Conference Proceedings 2991 (1), 020062 , 2024 2024
Analysis and characterization of Fe-Cr-Al alloy variation of time process by mechanical alloying method K Priyono, Fajar, A Sujatno, M Awwaluddin AIP Conference Proceedings 3103 (1), 020009 , 2024 2024
Linkage design optimization on patient bed mechanical systems using solidworks M Awwaluddin, MA Musthofa, K Pridjono, S Hastuty AIP Conference Proceedings 3103 (1), 040003 , 2024 2024
Effect of Yttrium on corrosion resistance of Zr-based alloys in Ringer's lactate solution for biomaterial applications. M Awwaluddin, S Hastuty, DH Prajitno, B Prasetiyo, Y Irawadi, ... AIMS Materials Science 11 (3) , 2024 2024 Citations: 1
Design, Fabrication, and Testing of Salt Spray as An Atmospheric Corrosion Test Tool Using MgCl₂ and NaCl Solutions S Hastuty, DT Oktaviyanto, FK Nadhor, W Caesarendra, M Awwaluddin Jurnal Kimia Sains dan Aplikasi 27 (10), 499-509 , 2024 2024 Citations: 1
Analysis of voltage, current density, and welding speed of flux core arc welding on the hardness and micro-structure of high strength low alloy (ASTM A572) MZ Afkari, SRI Hastuty, MA Barrinaya, M Awwaluddin, MS Anwar, ... Key Engineering Materials 948, 33-39 , 2023 2023 Citations: 4
Corrosion Behavior of Hastelloy C-276 in Hydrochloric and Sulfuric Acid S Hastuty, A Widiatmoko, T Sudiro, M Awwaluddin, P Puspitasari Key Engineering Materials 940, 83-88 , 2023 2023 Citations: 2
Effect of the Addition of Ferric Nitrate on Electrochemical Machining of 304 Stainless Steel in Sodium Nitrate Solution S Purbolaksono, YF Buys, M Awwaluddin 2023
Analysis of Electrochemical Machining on Stainless Steel 304 in Natrium Chloride Solution with Ferric Nitrate Addition S Hastuty, AA Rimper, K Widiyati, P Kadarno, Y Rahmawan, ... 2023
PENGARUH PENAMBAHAN UNSUR Ca PADA PADUAN Mg-Ca TERHADAP PEMBENTUKAN FASA UNTUK APLIKASI IMPLAN MAMPU LURUH M Mustopa, K Prijono, M Awwaluddin MISTEK-Jurnal Ilmiah Mesin Inovasi dan Teknologi 3 (1), 1-6 , 2022 2022
Analysis of non-destructive test on type V single welding joints in SS304 pipe material and its correlation with mechanical properties K Priyono, M Awwaluddin, MIF Almasyu, F Astuti, H Santoso AIP Conference Proceedings 2561 (1), 020005 , 2022 2022
Analysis of manufacturing rectangular holes on SS304 using electrochemical machining method M Awwaluddin, Sulardi, N Rohmat AIP Conference Proceedings 2561 (1), 020009 , 2022 2022
Corrosion Resistance Enhancement of Stainless Steel Powder Metallurgy in Artificial Body Fluids by Reinforcement of Boron and Niobium S Hastuty, FRA Saputra, BW Ryandwita, M Awwaluddin, M Kartaman, ... ICPER 2020: Proceedings of the 7th International Conference on Production … , 2022 2022
Mechanical Properties and Pitting Corrosion Behavior of Zr-Mo-Al-Ti-Y in Simulated Human Body Fluids M Awwaluddin, D Hadi Prajitno, S Hastuty, TP Soemardi ICPER 2020: Proceedings of the 7th International Conference on Production … , 2022 2022
Sistem Keamanan Kendaraan untuk Meningkatkan Skilled Individual dalam Menciptakan Peluang Usaha Baru di Provinsi Banten A Herdiani, ES Andayani, M Awwaluddin Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat 22 (1), 68-74 , 2022 2022
The effectivity of oil palm inhibitor processed by aminolysis to control corrosion on steel in sodium chloride environment S Hastuty, HA Prasetyo, NN Kirana, A Nugroho, HS Oktaviano, ... Journal of Physics: Conference Series 2080 (1), 012027 , 2021 2021 Citations: 7
MOST CITED SCHOLAR PUBLICATIONS
Perhitungan Kebutuhan Cooling Tower Pada Rancang Bangun Untai Uji Sistem Kendali Reaktor Riset M Awwaluddin, P Santosa, S Suwardiyono Prima: Aplikasi dan Rekayasa dalam Bidang Iptek Nuklir 9 (1), 160415 , 2012 2012 Citations: 21
Analisa kekuatan rangka sepeda listrik menggunakan software SolidWorks M Awwaluddin Piston: Journal of Technical Engineering 3 (1), 5-16 , 2019 2019 Citations: 20
Analisis Perpindahan Kalor Pada Heat Exchanger Pipa Ganda Dengan Sirip Berbentuk Delta Wing M Awwaluddin UMS Semarang , 2007 2007 Citations: 16
Analisis statik support pemegang sumber pada prototip pencitraan peti kemas menggunakan ansys M Awwaluddin, E Purwanta Jurnal Perangkat Nuklir 8 (1) , 2015 2015 Citations: 8
The effectivity of oil palm inhibitor processed by aminolysis to control corrosion on steel in sodium chloride environment S Hastuty, HA Prasetyo, NN Kirana, A Nugroho, HS Oktaviano, ... Journal of Physics: Conference Series 2080 (1), 012027 , 2021 2021 Citations: 7
Analytical Design of Helical Coil Steam Generator for Hot Temperature Gas Reactor BW Riyandwita, M Awwaludin, Krismawan, P Zacharias, E Siswanto, ... Journal of Physics: Conference Series 1198 (4), 042014 , 2019 2019 Citations: 7
Mechanical properties and corrosion behavior of novel β-type biomaterial Zr-6Mo-4Ti-xY alloys in simulated body fluid Ringer’s lactate solution for implant applications M Awwaluddin, DH Prajitno, WA Adi, M Kartaman, TP Soemardi AIMS Materials Science 7 (6), 887-901 , 2020 2020 Citations: 6
Analysis of voltage, current density, and welding speed of flux core arc welding on the hardness and micro-structure of high strength low alloy (ASTM A572) MZ Afkari, SRI Hastuty, MA Barrinaya, M Awwaluddin, MS Anwar, ... Key Engineering Materials 948, 33-39 , 2023 2023 Citations: 4
Performance evaluation of helical coil heat exchanger with annulus shell side using computational fluid dynamics BW Riyandwita, M Awwaluddin, S Hastuty AIP Conference Proceedings 2180 (1), 020039 , 2019 2019 Citations: 4
Failure analysis of boiler leakage due to caustic corrosion on Cr-Mo steel M Awwaluddin, S Hastuty, BW Riyandwita, P Zacharias, E Siswanto IOP Conference Series: Materials Science and Engineering 536 (1), 012020 , 2019 2019 Citations: 4
Static, dynamic, and fatigue analysis of the mechanical system of ultrasonic scanner for inservice inspection of research reactors M Awwaluddin, K Kristedjo, K Handono, H Ahmad Journal of Physics: Conference Series 962 (1), 012027 , 2018 2018 Citations: 4
The mechatronic system design of ultrasonic scanner for inservice inspection of research reactor K Handono, K Kristedjo, M Awwaluddin, I Shobary Journal of Physics: Conference Series 962 (1), 012028 , 2018 2018 Citations: 3
Analisis Tegangan Statik Dan Dinamik Pada Perancangan Dan Pengembangan Struktur Bodi Monorail Produksi Pt. Mbw Menggunakan Finite Element Analysis (Ansys) M Awwaluddin, TP Soemardi Seminar Universitas Indonesia , 2013 2013 Citations: 3
Corrosion Behavior of Hastelloy C-276 in Hydrochloric and Sulfuric Acid S Hastuty, A Widiatmoko, T Sudiro, M Awwaluddin, P Puspitasari Key Engineering Materials 940, 83-88 , 2023 2023 Citations: 2
Chain and Sprocket Analysis of Control Rod Drive Mechanism of HTGR Experimental Power Reactor M Awwaluddin, S Hastuty, Z Petrus, HS Putut, Krismawan, S Edi, ... Journal of Physics: Conference Series 1198 (2), 022053 , 2019 2019 Citations: 2
Considerations of Material Selection for Control Rod Drive Mechanism of Reaktor Daya Eksperimental S Hastuty, P Zacharias, M Awwaluddin, Krismawan, PH Setiawan, ... Journal of Physics: Conference Series 1198 (3), 032010 , 2019 2019 Citations: 2
Mechanical System Design of Ultrasonic Scanner for Research Reactor M Awwaluddin, K Handono National Seminar on Utilization of Nuclear Technology, South Tangerang , 2016 2016 Citations: 2
Analisa Fatigue Life Struktur Mekanik Pasien Pada Perangkat Renograf Terpadu Menggunakan Metode Finite Element M Awwaluddin, T Hardjanto, J Sumanto, PRFNP BATAN Jurnal Perangkat Nuklir ISSN No 1978, 3515 , 2015 2015 Citations: 2
Pembuatan diagram alir instrumentasi dan pemipaan untai uji sistem kendali reaktor riset T Tukiman, P Santoso, S Suwardiyono, M Awaludin, E Purwanta Prima: Aplikasi dan Rekayasa dalam Bidang Iptek Nuklir 9 (2), 160880 , 2013 2013 Citations: 2
Effect of Yttrium on corrosion resistance of Zr-based alloys in Ringer's lactate solution for biomaterial applications. M Awwaluddin, S Hastuty, DH Prajitno, B Prasetiyo, Y Irawadi, ... AIMS Materials Science 11 (3) , 2024 2024 Citations: 1