Dr. Uttam Acharya

Scopus Publications

Thermal dynamics and torque-force interplay in friction stir welding of advanced aluminium composites
Uttam Acharya, Smrity Choudhury, Durjyodhan Sethi, Barnik Saha Roy, Arunkumar Thirugnanasambandam
Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications, 2026
This study presents a comprehensive analysis of the thermal history and force-torque dynamics in the friction stir welding (FSW) of advanced high-strength structural aluminium matrix composites. Using AA6092/17.5 SiCp-T6 plates, the research explores the intricate interplay between thermal profiles, torque-force behaviour, and weld integrity, with a key focus on tool revolution pitch (TRP), which significantly influences heat flow patterns and material deformation. The results reveal a gradual decrease in peak temperature from 509 °C to 444 °C as TRP increases from 0.017 to 0.069 mm/rev, followed by a sharp drop to 310 °C at 0.12 mm/rev. A consistent thermal asymmetry is observed, with the advancing side exhibiting higher temperatures than the retreating side, reaching a maximum temperature difference of 54 °C at 0.12 mm/rev. Cooling rates initially increase from 4.81 °C/s at 0.017 mm/rev to 8.15 °C/s at 0.069 mm/rev before declining to 5.54 °C/s at 0.12 mm/rev. A steady increase in spindle torque and Z-force with rising TRP is identified, attributed to reduced heat input and insufficient plastic deformation at elevated TRP levels. Microstructural analysis reveals that defect-free welds are obtained up to a TRP of 0.094 mm/rev, whereas insufficient material flow and plasticisation result in tunnel defect formation at 0.12 mm/rev. Grain size decreases from 4.88 μm at TRP1 to 4.31 μm at TRP3 due to reduced heat input but increases to 7.36 μm at TRP5 due to incomplete recrystallization. Additionally, coarser reinforcement particles emerge at higher TRP values, resulting from reduced tool rotations within a specific area.
Producing multilayer laminated composite of aluminium/copper by friction stir additive manufacturing process
Smrity Choudhury, Manisha Roy, Viresh Payak, Uttam Acharya, Peter Omoniyi, Stephen Akinlabi, Esther Akinlabi, Barnik Saha Roy
Advances in Materials and Processing Technologies, 2026
The objective of this study was to assess the feasibility of producing Al-Cu multi-layered composite through the friction stir additive manufacturing (FSAM) process and to analyse the microstructure and mechanical properties of the fabricated composite. The composite was fabricated at a rotational speed of 1100 rpm, traverse speed of 60 mm/min and a 2° tilt angle. The macrostructure, microstructure, and intermetallic formation were observed and analysed. The macro and microstructure results indicated that achieving defect-free build is feasible in the selected parameter settings. In-depth examinations using energy-dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD) unveiled the presence of intermetallic compounds (IMCs) such as AlCu, Al2Cu, and Al4Cu9 within the stir zone in various regions of the build. Notably, inhomogeneous microhardness levels ranging from 56.7 HV0.1 and 324.6 HV0.1 were noted, corresponding to distinct microstructural features and the various IMCs within the build. The Al-Cu composite demonstrated an excellent balance of strength and ductility, with an ultimate tensile strength of 187.7 MPa and an elongation of 19%. These findings bring out the exceptional opportunity presented by FSAM process for fabricating innovative Al-Cu multilayered composites with unique mechanical properties.
Analysis of Palladium-induced Charges in the Device Characteristics of a TiO2-based Thin Film Transistor for Gas Sensing Applications
Uttam Acharya, S. S. Sharadhruthi, M. Sachin, Sameeksha Sanil, V. Sandeep
Semiconductors, 2025
Abstract— This study focuses on designing and simulating a Titanium Dioxide (TiO2) based Thin Film Transistor (TFT) using Sentaurus Technology CAD (TCAD) tool. A Palladium metal layer is placed over the TFT to enhance the device’s sensitivity to toxic gases, particularly those associated with food spoilage and contamination. The simulations explore the Pd-induced changes in the drain current, threshold voltage, as well as subthreshold swing of the TiO2 TFT. The simulation leverages a process known as the electro-desorption mechanism, which is fast and efficient, making the device capable of real-time monitoring. The device’s performance is evaluated through its output and transfer characteristics, demonstrating a superior response when compared to traditional MOSFET devices. The incorporation of Pd facilitates a significant improvement in the device’s ability to detect minute changes in gas concentrations, which is crucial for early detection of food spoilage. Current drive as high as 9.01 μA was attained in the proposed TFT device before placing the Palladium toxic material, and after placing, nearly 4 μA reduction in current drive is observed. These characteristics reveal the enhanced sensitivity of the device to toxic gases, underscoring its potential as a reliable and accurate tool for food safety applications. The study also highlights the advantages of incorporating palladium as a sensing layer, offering greater detection precision and a faster response time for identifying hazardous gases in various food environments. The electrical characteristics of the device are thoroughly examined in the study’s conclusion, emphasizing its potential for low-power uses in portable food safety monitoring systems. The findings show that the Pd-functionalized TiO2 TFT is a viable way to create sophisticated gas sensors for food safety applications that have improved sensitivity, selectivity, and stability.
Taguchi-Grey relational analysis driven multi-objective optimization of weld bead geometry and hardness in laser welded Ti6Al4V Alloy
Peter Omoniyi, Uttam Acharya, Stephen Akinlabi, Tien-Chien Jen, Esther Akinlabi
International Journal on Interactive Design and Manufacturing, 2025
This study used Taguchi-based Grey relational analysis to optimize the bead geometry (bead width and length) and the hardness of laser welded 3 mm thick Ti6Al4V alloy sheets joined using the butt configuration. Firstly, the L9 (32) orthogonal array, with varying laser power and welding speed, was employed to optimize the input parameters (bead length, width, and hardness). The Taguchi optimization showed that the welding speed and laser power have a significant effect on the hardness of the welds and that laser power has a significant impact on the bead length. Meanwhile, the welding parameters had little effect on the bead width. These results were further affirmed with the Analysis of Variance (ANOVA). The Grey relational multi-objective optimization shows the optimized parameters for all responses to be 3 kW laser power and 2.2 m/min welding speed. It is important to note that the combination of Taguchi and Grey relational analysis and ANOVA is useful in optimizing welding parameters to achieve suitable weld properties.
Prediction of coefficient of friction in friction stir welding and its implementation in a thermo-mechanical model
Tanmoy Medhi, Uttam Acharya, Smrity Choudhury, Pankaj Kr Das, Esther Akinlabi, Barnik S Roy
Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2025
Friction stir welding (FSW) faces a critical challenge in numerical modelling due to the widespread assumption of a constant coefficient of friction ( µ ), which leads to inaccuracies in predicting thermal profiles and heat generation dynamics. This study addresses this gap by developing a temperature-dependent µ model to enhance the fidelity of thermo-mechanical simulations—a vital step for optimizing weld quality and process efficiency in industries like aerospace and automotive. Experiments employed an AA6061-T6 aluminium alloy and 100 Cr steel ball in a pin-on-disc tribometer under controlled conditions (load: 2–8 N, sliding speed: 30–120 mm/s, temperature: 50–300 °C) using an L16 orthogonal array. Regression analysis via Minitab 17 revealed that µ ranged from 0.415 to 0.682, with temperature contributing 49% of the variability, followed by load (30%) and sliding speed (7%). A second-order polynomial equation ( R 2 = 0.9886) quantified µ as a function of temperature, load, and speed, which was integrated into a modified thermo-mechanical model. Compared to constant- µ models, the revised model improved heating rate predictions by 23%, achieving <5% error in peak temperature estimates during experimental validation. Cooling rate disparities (up to 15%) highlighted the need for refined boundary condition modelling. The work's novelty lies in its first-of-its-kind empirical regression framework for µ in FSW, bridging a critical gap between tribological experimentation and thermo-mechanical simulations. By replacing static µ assumptions with dynamic, parameter-driven values, this approach advances predictive accuracy in FSW modelling beyond prior literature, which predominantly relied on fixed µ ranges (e.g., 0.25–0.6) without systemic parameter interactions.
Synthesis and characterization of doxycycline-loaded magnetic nanocomposite with enhanced bactericidal activity
Moupiya Ghosh, Samir Mandal, Shristi Das, Anwesha Chatterjee, Deepshikha Datta, Harshata Pal, Uttam Acharya, Swapan Kumar Pradhan
Materials Today Communications, 2024
Enhancing joint performance in friction stir welding through tailored double-butt-lap geometry
Uttam Acharya, Smrity Choudhury, Durjyodhan Sethi, Esther Akinlabi, Barnik Saha Roy
Welding in the World, 2024
The study investigates the effectiveness of a novel joint configuration, the double-butt-lap (DBL), in friction stir welding (FSW) to join 6-mm-thick AA 6061-T6 plates. Four welds, including a simple square butt (SSB) configuration and three DBL variations (with UB to LB ratios of 1:2, 1:1, and 2:1), were executed. Using consistent parameters, the investigation evaluates the force distribution, macrostructure, and mechanical properties of the joints. Results show varied force profiles; spindle torque and Z-force decrease notably in DBL configurations compared to SSB, while X-force decreases overall for all DBL variations. Macrostructural analysis indicates increased weld area and finer microstructures in DBL joints. A correlation between peak temperature, grain size, and hardness highlights larger grain sizes at higher temperatures, influencing joint hardness. The DBL configuration with a 2:1 ratio exhibits the highest joint efficiency (83.76%). Fractographic analysis indicates ductile failure in all samples. Bend testing reveals increased flexural strength and bend angles in two DBL-configured joints compared to SSB. The results indicate that using a 2:1 ratio for joining 6-mm AA6061-T6 plates through FSW is viable, providing valuable insights into enhancing mechanical properties by optimizing joint geometry.
Exploring the Influence of SiC Particles on Temperature Variations, Microstructural Evolution, and Mechanical Characteristics in the Friction Stir Processing of AA6061-T6 Plates
Setu Suman, Durjyodhan Sethi, Uttam Acharya, Barnik Saha Roy
Silicon, 2024
Effect of tool traverse speed on high strength structural AA6092/17.5 SiCp-T6 AMC friction stir welding
Uttam Acharya, Abhijit Banik, Fredrick Mwema, Stephen Akinlabi, Esther Akinlabi, Barnik Saha Roy
Materials Today Communications, 2024
Synergic enhancement of ductility and toughness in friction stir additively fabricated AA6061-T6 build
Smrity Choudhury, Uttam Acharya, Durjyodhan Sethi, Joydeep Roy, Barnik Saha Roy
Journal of Adhesion Science and Technology, 2024
This study comprehensively investigates the ductility and impact toughness aspects of friction stir additively fabricated (FSAF) components, particularly crucial for applications in aerospace components like stringers and stiffeners. FSAF technology is used to create a fifteen-layered AA6061-T6 build out of 3 mm thick aluminium sheets. A taper threaded tool with a pin length of 4.5 mm (corresponding to a plunge depth of 50% into the lower layer thickness) was used for the experiment. Dynamic recrystallisation resulted in the creation of a stir zone with fine grains, as demonstrated by optical microscopy. Differences in the size of grains, as well as alterations in the distribution, and size of precipitates were observed in the direction of fabrication. The hardness and tensile strength exhibited variations across layers, with the uppermost layer displaying the highest values (82.48 HV and 252.60 MPa, respectively). An impressive milestone was reached with the attainment of 66% ductility, primarily attributed to the process of fragmentation and partial reduction in grain boundary phases. The results of impact toughness have showcased a significant accomplishment as well. Impact tests yielded 112 J and 86 J for the crack-arrester and crack-divider orientations, with enhanced ductility playing a significant role. Delaminations in crack-arrester samples led to higher energy absorption.
An experimental approach for achieving high strength dissimilar aluminium-magnesium joints: Application of tool pin profiles on different joint configurations
Uttam Acharya, U. Kumar, Moupiya Ghosh, S. Choudhury, A. Srivastava, B. S. Roy
CIRP Journal of Manufacturing Science and Technology, 2023
Recent progress in solid-state additive manufacturing technique: Friction stir additive manufacturing
Smrity Choudhury, Uttam Acharya, Joydeep Roy, Barnik Saha Roy
Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2023
Influence of tool rotational speed on Microstructure and Mechanical Properties of Al-Li Alloy using Friction Stir Welding
Sanjeev Kumar, Jitendra Kumar Katiyar, Uttam Acharya, Subash Chandra Saha, Barnik Saha Roy
Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering, 2022
Effect of tool rotational speed on friction stir welded AA6061-T6 scarf joint configuration
Durjyodhan Sethi, Uttam Acharya, Sanjeev Kumar, Shashank Shekhar, Barnik Saha Roy
Advanced Composites and Hybrid Materials, 2022
Effect of Reinforcement Particles on Friction Stir Welded Joints with Scarf Configuration: an Approach to Achieve High Strength Joints
Durjyodhan Sethi, Uttam Acharya, Sanjeev Kumar, Shashank Shekhar, Barnik Saha Roy
Silicon, 2022
Applicability of unique scarf joint configuration in friction stir welding of AA6061-T6: Analysis of torque, force, microstructure and mechanical properties
Durjyodhan Sethi, Uttam Acharya, Shashank Shekhar, Barnik Saha Roy
Defence Technology, 2022
Study of modified joint configuration in friction stir welding of dissimilar Al-Mg plates
Uday Kumar, Uttam Acharya, Barnik Saha Roy
International Journal of Materials and Product Technology, 2022
Effect of Heat Input on Microstructure and Mechanical Properties of Friction Stir Welded AA6092/17.5 SiCp-T6
Uttam Acharya, Manasij Kumar Yadava, Abhijit Banik, Subhash Chandra Saha, Barnik Saha Roy
Journal of Materials Engineering and Performance, 2021
Assessment of the surface characteristics of aerospace grade AA6092/17.5 SiCp-T6 composite processed through EDM
Shirsendu Das, Uttam Acharya, S.V.V.N. Siva Rao, Swarup Paul, Barnik Saha Roy
CIRP Journal of Manufacturing Science and Technology, 2021
Determination of best tool geometry for friction stir welding of AA 6061-T6 using hybrid PCA-TOPSIS optimization method
Abhijit Banik, Abhijit Saha, John Deb Barma, Uttam Acharya, Subhash Chandra Saha
Measurement Journal of the International Measurement Confederation, 2021
On the Role of Tool Tilt Angle on Friction Stir Welding of Aluminum Matrix Composites
Uttam Acharya, Barnik Saha Roy, Subhash Chandra Saha
Silicon, 2021
A study on the implication of modified joint configuration in friction stir welding
Uttam Acharya, Tanmoy Medhi, Durjyodhan Sethi, Smrity Choudhury, Abhijit Banik, Subhash Chandra Saha, Barnik Saha Roy
Soldagem E Inspecao, 2021
Effect of traverse speed on microstructure and mechanical properties of friction-stir-welded third-generation Al–Li alloy
Sanjeev Kumar, Uttam Acharya, Durjyodhan Sethi, Tanmoy Medhi, Barnik Saha Roy, Subhash Chandra Saha
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2020
Effect of tool rotational speed on the particle distribution in friction stir welding of AA6092/17.5 SiCp-T6 composite plates and its consequences on the mechanical property of the joint
Uttam Acharya, Barnik Saha Roy, Subhash Chandra Saha
Defence Technology, 2020
Torque and force perspectives on particle size and its effect on mechanical property of friction stir welded AA6092/17.5SiC p -T6 composite joints
Uttam Acharya, Barnik Saha Roy, Subhash Chandra Saha
Journal of Manufacturing Processes, 2019
Microstructure and mechanical property of friction stir welded Al-Mg joints by adopting modified joint configuration technique
Uday kumar, Uttam Acharya, S.C. Saha, Barnik Saha Roy
Materials Today Proceedings, 2019
Adaptive neuro fuzzy interference system modeling for wire electric discharge machining of Al7075/B4C composite
Subham Kumar Pandey, Shubham Gupta, Uttam Acharya, Joydeep Roy
Materials Today Proceedings, 2019
Microstructural and mechanical property of friction stir welded Al7075/TiB2aluminium matrix composite
Durjyodhan Sethi, Uttam Acharya, Tanmoy Medhi, Shashank Shekhar, Barnik Saha Roy
Materials Today Proceedings, 2019
Welding condition & microstructure of friction stir welded AA 6061-T6 and AZ31B
Uday Kumar, Anurag Prajapati, Uttam Acharya, Tanmoy Medhi, Barnik Saha Roy, S.C. Saha
Materials Today Proceedings, 2019
Study of microstructure and mechanical properties in friction stir welded aluminum copper lap joint
Tapash Choudhury, Arijit Ghorai, Tanmoy Medhi, Uttam Acharya, Barnik Saha Roy, S.C. Saha
Materials Today Proceedings, 2019
A parametric study of friction stir welded AA6061/SiC AMC and its effect on microstructure and mechanical properties
Devender Kumar, Denny J. Ottarackal, Uttam Acharya, Tanmoy Medhi, Barnik Saha Roy, Subhash Chandra Saha
Materials Today Proceedings, 2019
A Study of Tool Wear and its Effect on the Mechanical Properties of Friction Stir Welded AA6092/17.5 Sicp Composite Material Joint
Uttam Acharya, Barnik Saha Roy, Subash Chandra Saha
Materials Today Proceedings, 2018

RECENT SCHOLAR PUBLICATIONS

Prediction of coefficient of friction in friction stir welding and its implementation in a thermo-mechanical model
T Medhi, U Acharya, S Choudhury, PK Das, E Akinlabi, BS Roy
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of … , 2025
2025
Citations: 1
Thermal dynamics and torque-force interplay in friction stir welding of advanced aluminium composites
U Acharya, S Choudhury, D Sethi, BS Roy, A Thirugnanasambandam
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of … , 2025
2025
Citations: 1
Taguchi-Grey relational analysis driven multi-objective optimization of weld bead geometry and hardness in laser welded Ti6Al4V Alloy
P Omoniyi, U Acharya, S Akinlabi, TC Jen, E Akinlabi
International Journal on Interactive Design and Manufacturing (IJIDeM) 19 (1 … , 2025
2025
Citations: 15
Synthesis and characterization of doxycycline-loaded magnetic nanocomposite with enhanced bactericidal activity
M Ghosh, S Mandal, S Das, A Chatterjee, D Datta, H Pal, U Acharya, ...
Materials Today Communications 41, 111027 , 2024
2024
Citations: 4
Synergic enhancement of ductility and toughness in friction stir additively fabricated AA6061-T6 build
S Choudhury, U Acharya, D Sethi, J Roy, BS Roy
Journal of Adhesion Science and Technology 38 (16), 3092-3118 , 2024
2024
Citations: 14
Producing multilayer laminated composite of aluminium/copper by friction stir additive manufacturing process
S Choudhury, M Roy, V Payak, U Acharya, P Omoniyi, S Akinlabi, ...
Advances in Materials and Processing Technologies, 1-20 , 2024
2024
Citations: 4
Enhancing joint performance in friction stir welding through tailored double-butt-lap geometry
U Acharya, S Choudhury, D Sethi, E Akinlabi, BS Roy
Welding in the World 68 (5), 1089-1101 , 2024
2024
Citations: 9
Exploring the influence of SiC particles on temperature variations, microstructural evolution, and mechanical characteristics in the friction stir processing of AA6061-T6 plates
S Suman, D Sethi, U Acharya, BS Roy
Silicon 16 (5), 2219-2231 , 2024
2024
Citations: 7
Effect of tool traverse speed on high strength structural AA6092/17.5 SiCp-T6 AMC friction stir welding
U Acharya, A Banik, F Mwema, S Akinlabi, E Akinlabi, BS Roy
Materials Today Communications 38, 108040 , 2024
2024
Citations: 11
A comprehensive investigation on various welding facets for FSW of advanced structural AMC
U Acharya, S Choudhury, D Sethi, E Akinlabi, KK Saxena, BS Roy
2024
An experimental approach for achieving high strength dissimilar aluminium-magnesium joints: Application of tool pin profiles on different joint configurations
U Acharya, U Kumar, M Ghosh, S Choudhury, AK Srivastava, BS Roy
CIRP Journal of Manufacturing Science and Technology 45, 49-60 , 2023
2023
Citations: 10
Recent progress in solid-state additive manufacturing technique: Friction stir additive manufacturing
S Choudhury, U Acharya, J Roy, BS Roy
Proceedings of the Institution of mechanical engineers, part E: Journal of … , 2023
2023
Citations: 22
Influence of tool rotational speed on microstructure and mechanical properties of Al-Li alloy using friction stir welding
S Kumar, JK Katiyar, U Acharya, SC Saha, BS Roy
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of … , 2022
2022
Citations: 23
Effect of tool rotational speed on friction stir welded AA6061-T6 scarf joint configuration
D Sethi, U Acharya, S Kumar, S Shekhar, BS Roy
Advanced Composites and Hybrid Materials 5 (3), 2353-2368 , 2022
2022
Citations: 20
Effect of reinforcement particles on friction stir welded joints with scarf configuration: an approach to achieve high strength joints
D Sethi, U Acharya, S Kumar, S Shekhar, BS Roy
Silicon 14 (12), 6847-6860 , 2022
2022
Citations: 10
Applicability of unique scarf joint configuration in friction stir welding of AA6061-T6: analysis of torque, force, microstructure and mechanical properties
D Sethi, U Acharya, S Shekhar, BS Roy
Defence Technology 18 (4), 567-582 , 2022
2022
Citations: 20
Study of modified joint configuration in friction stir welding of dissimilar Al-Mg plates
U Kumar, U Acharya, BS Roy
International Journal of Materials and Product Technology 64 (3-4), 307-324 , 2022
2022
Citations: 2
Effect of Heat Input on Microstructure and Mechanical Properties of Friction Stir Welded AA6092/17.5 SiCp-T6
BSR Uttam Acharya , Manasij Kumar Yadava, Abhijit Banik, Subhash Chandra Saha
Journal of Materials Engineering and Performance , 2021
2021
Citations: 11
Assessment of the surface characteristics of aerospace grade AA6092/17.5 SiCp-T6 composite processed through EDM
BSR Shirsendu Das, Uttam Acharya, S.V.V.N Siva Rao, Swarup Paul
CIRP Journal of Manufacturing Science and Technology 33 (May 2021), 123-132 , 2021
2021
Citations: 13
Determination of best tool geometry for friction stir welding of AA 6061-T6 using hybrid PCA-TOPSIS optimization method
A Banik, A Saha, JD Barma, U Acharya, SC Saha
Measurement 173, 108573 , 2021
2021
Citations: 51

MOST CITED SCHOLAR PUBLICATIONS

Determination of best tool geometry for friction stir welding of AA 6061-T6 using hybrid PCA-TOPSIS optimization method
A Banik, A Saha, JD Barma, U Acharya, SC Saha
Measurement 173, 108573 , 2021
2021
Citations: 51
Effect of tool rotational speed on the particle distribution in friction stir welding of AA6092/17.5 SiCp-T6 composite plates and its consequences on the mechanical property of …
U Acharya, BS Roy, SC Saha
Defence Technology 16 (2), 381-391 , 2020
2020
Citations: 48
Efect of traverse speed on microstructure and mechanical properties of friction‑stir‑welded third‑generation Al–Li alloy
SCS Sanjeev Kumar, Uttam Acharya, Durjyodhan Sethi, Tanmoy Medhi, Barnik ...
Journal of the Brazilian Society of Mechanical Sciences and Engineering 42 … , 2020
2020
Citations: 39
On the role of tool tilt angle on friction stir welding of aluminum matrix composites
U Acharya, BS Roy, SC Saha
Silicon 13 (1), 79-89 , 2021
2021
Citations: 35
Torque and force perspectives on particle size and its effect on mechanical property of friction stir welded AA6092/17.5 SiCp-T6 composite joints
U Acharya, BS Roy, SC Saha
Journal of Manufacturing Processes 38, 113-121 , 2019
2019
Citations: 35
A study of tool wear and its effect on the mechanical properties of friction stir welded AA6092/17.5 Sicp composite material joint
U Acharya, BS Roy, SC Saha
Materials Today: Proceedings 5 (9), 20371-20379 , 2018
2018
Citations: 24
Influence of tool rotational speed on microstructure and mechanical properties of Al-Li alloy using friction stir welding
S Kumar, JK Katiyar, U Acharya, SC Saha, BS Roy
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of … , 2022
2022
Citations: 23
Recent progress in solid-state additive manufacturing technique: Friction stir additive manufacturing
S Choudhury, U Acharya, J Roy, BS Roy
Proceedings of the Institution of mechanical engineers, part E: Journal of … , 2023
2023
Citations: 22
A parametric study of friction stir welded AA6061/SiC AMC and its effect on microstructure and mechanical properties
SCS Devender Kumar, Denny J. Ottarackal, Uttam Acharya, Tanmoy Medhi, Barnik ...
Materials Today: Proceedings , 2020
2020
Citations: 22
Effect of tool rotational speed on friction stir welded AA6061-T6 scarf joint configuration
D Sethi, U Acharya, S Kumar, S Shekhar, BS Roy
Advanced Composites and Hybrid Materials 5 (3), 2353-2368 , 2022
2022
Citations: 20
Applicability of unique scarf joint configuration in friction stir welding of AA6061-T6: analysis of torque, force, microstructure and mechanical properties
D Sethi, U Acharya, S Shekhar, BS Roy
Defence Technology 18 (4), 567-582 , 2022
2022
Citations: 20
Microstructure and Mechanical Property of friction stir welded Al-Mg Joints by adopting modified joint configuration technique
Uday Kumar, Uttam Acharya, S. C. Saha, Barnik Saha Roy
Materials Today: Proceedings , 2020
2020
Citations: 19
Taguchi-Grey relational analysis driven multi-objective optimization of weld bead geometry and hardness in laser welded Ti6Al4V Alloy
P Omoniyi, U Acharya, S Akinlabi, TC Jen, E Akinlabi
International Journal on Interactive Design and Manufacturing (IJIDeM) 19 (1 … , 2025
2025
Citations: 15
Welding condition & microstructure of friction stir welded AA 6061-T6 and AZ31B
U Kumar, A Prajapati, U Acharya, T Medhi, BS Roy, SC Saha
Materials Today: Proceedings 46, 9484-9489 , 2021
2021
Citations: 15
Synergic enhancement of ductility and toughness in friction stir additively fabricated AA6061-T6 build
S Choudhury, U Acharya, D Sethi, J Roy, BS Roy
Journal of Adhesion Science and Technology 38 (16), 3092-3118 , 2024
2024
Citations: 14
Study of microstructure and mechanical properties in friction stir welded aluminum copper lap joint
T Choudhury, A Ghorai, T Medhi, U Acharya, BS Roy, SC Saha
Materials Today: Proceedings 46, 9474-9479 , 2021
2021
Citations: 14
Assessment of the surface characteristics of aerospace grade AA6092/17.5 SiCp-T6 composite processed through EDM
BSR Shirsendu Das, Uttam Acharya, S.V.V.N Siva Rao, Swarup Paul
CIRP Journal of Manufacturing Science and Technology 33 (May 2021), 123-132 , 2021
2021
Citations: 13
Effect of tool traverse speed on high strength structural AA6092/17.5 SiCp-T6 AMC friction stir welding
U Acharya, A Banik, F Mwema, S Akinlabi, E Akinlabi, BS Roy
Materials Today Communications 38, 108040 , 2024
2024
Citations: 11
Effect of Heat Input on Microstructure and Mechanical Properties of Friction Stir Welded AA6092/17.5 SiCp-T6
BSR Uttam Acharya , Manasij Kumar Yadava, Abhijit Banik, Subhash Chandra Saha
Journal of Materials Engineering and Performance , 2021
2021
Citations: 11
Microstructural and mechanical property of friction stir welded Al7075/TiB2 aluminium matrix composite
Durjyodhan Sethi, Uttam Acharya, Tanmoy Medhi, Shashank Shekhar, Barnik Saha Roy
Materials Today: Proceedings , 2020
2020
Citations: 11

Dr. Uttam Acharya

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Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS

Publications