Faculty

Current Research

• Characteristics of heat-assisted rotary friction welding
• Modification of the sprayed surface by friction stir processing
• Friction stir additive manufacturing – tool design and its performance
• Fused deposition modeling – build-direction strength improvement

Completed Research

• Development of fixture for micro-friction stir welding (micro-FSW) of aluminium alloy sheets
• On process parameters and associated deformation conditions during micro-FSW
• On triple-spiral micro-grooves on the tool-shoulder end-surface and its effect on process responses during micro-FSW.

Future Research Directions

Interdisciplinary research work that aligns with my interests on topics including, but not limited to, the areas of biomedical engineering, chemical engineering, materials science, tribology, sustainable engineering, and artificial intelligence/machine learning.

Journal Articles

• Kishore, H.*, Singh, A., Ahmed, S., Nirala, C.K., and Singh, H., 2026. Exploration of Reverse-µEDM capability towards innovative fabrication of micro-grooves on a pinless FSP tool. Nanotechnology and Precision Engineering. In Press. (IF: 2.7; h5-index: 22).
• Gangwar, S. and Ahmed, S.*, 2025. On Porosity and Flexural Strength of FDM Parts Printed using Short Carbon Fiber Reinforced Polyamide 6 Filament. Engineering Headway, 22, pp.11-19. (h5-index: 4) https://doi.org/10.4028/p-hWCJw4 
• Patel, K.V., Jagani, D.T., Ganguli, A.A.* and Ahmed, S., 2024. Computational Fluid Dynamics (CFD) Studies to Study the Effect of Liquid Level on the Hydrodynamics in an Agitated Vessel with an Axial and Radial Impeller. Chemical Engineering Transactions, 111, pp.631-636. (h5-index: 26) https://doi.org/10.3303/CET24111106 
• Modi, U., Ahmed, S. and Rai, A.*, 2023. Prediction of ultimate tensile strength of friction stir welding joint using deep learning-based-multilayer perceptron and long short term memory networks. Welding International, 37(7), pp.387-399. (IF: 1.2; h5-index: 11) https://doi.org/10.1080/09507116.2023.2236936 
• Verma, M., Ahmed, S. and Saha, P.*, 2021. Challenges, process requisites/inputs, mechanics and weld performance of dissimilar micro-friction stir welding (dissimilar μFSW): A comprehensive review. Journal of Manufacturing Processes, 68, pp.249-276. (IF: 6.8; h5-index: 97) https://doi.org/10.1016/j.jmapro.2021.05.045 
• Ahmed, S., Verma, M. and Saha, P.*, 2021. Process responses during μFSW of AA6061-T6 under the influence of triple-spiral micro-grooves on shoulder end-surface. Journal of Materials Processing Technology, 290, p.116984. (IF: 7.5; h5-index: 85) https://doi.org/10.1016/j.jmatprotec.2020.116984
• Prajapati, D.K.* and Ahmed, S., 2020. Analysis of micro-friction stir welding surfaces using fractal methodologies. Surface Topography: Metrology and Properties, 8(3), p.035011. (IF: 2.4; h5-index: 28) https://doi.org/10.1088/2051-672X/abaeb3
• Ahmed, S. and Saha, P.*, 2020. Selection of optimal process parameters and assessment of its effect in micro-friction stir welding of AA6061-T6 sheets. The International Journal of Advanced Manufacturing Technology, 106(7), pp.3045-3061. (IF: 3.1; h5-index: 96) https://doi.org/10.1007/s00170-019-04840-6
• Imam, M.*, Sun, Y., Fujii, H., Ma, N., Tsutsumi, S., Ahmed, S., Chintapenta, V. and Murakawa, H., 2018. Deformation characteristics and microstructural evolution in friction stir welding of thick 5083 aluminum alloy. The International Journal of Advanced Manufacturing Technology, 99(1), pp.663-681. (IF: 3.1; h5-index: 96) https://doi.org/10.1007/s00170-018-2521-9
• Ahmed, S. and Saha, P.*, 2018. Development and testing of fixtures for friction stir welding of thin aluminium sheets. Journal of Materials Processing Technology, 252, pp.242-248. (IF: 7.5; h5-index: 85) https://doi.org/10.1016/j.jmatprotec.2017.09.034  

Book Chapter

• Ahmed, S., Shubhrant, A., Deep, A. and Saha, P.*, 2015, April. Development and analysis of butt and lap welds in micro-friction stir welding (µFSW). In Advances in Material Forming and Joining: 5th International and 26th All India Manufacturing Technology, Design and Research Conference, AIMTDR 2014 (pp. 295-306). New Delhi: Springer India. https://doi.org/10.1007/978-81-322-2355-9_15  

Conference Presentations and Proceedings

• Thanki, L., Singh, R., Joshi, K., Ganguli, A., Nirgude, V., Das, R., and Ahmed, S.*, 2026, March. Enhancing Build Direction Tensile Strength of 3D Printed Carbon Fiber Reinforced Nylon 6 Composite. In International Conference on Composite Materials and Technologies (InCoMat), Ahmedabad University, India. https://doi.org/10.33599/GL.2026.INCOMAT.TP26-0007
• Singh, R., Joshi, K.D., Pancholi, P., Ahmed, S., 2025, December. A Low-Cost and Lightweight Passive Snare Gripper for Industrial Robots: Design, Integration, and Performance Analysis. In 7th International and 22nd National Conference on Machines and Mechanisms (iNaCoMM), IIT Hyderabad, India.
• Modi, U., Rai, A., Badheka, V.J., and Ahmed, S.*, 2025, September. Effect of tool rotational speed, travel speed, and build layer number on force and temperature characteristics in friction stir additive manufacturing of AA5083-O. In 4th International Conference on Friction based Processes (ICFP), IIT Tirupati, India.
• Modi, U., Rai, A. and Ahmed, S.*, 2024, January. Research prospects of friction stir additive manufacturing (FSAM). In AIP Conference Proceedings (Vol. 2960, No. 1, p. 030006). AIP Publishing LLC. https://doi.org/10.1063/5.0183061
• Thaker, S., Shah, T., Raj, Y. and Ahmed, S.*, 2024, January. Tolerance stack-up analysis of toggle mechanism for clamping unit of an injection moulding machine. In AIP Conference Proceedings (Vol. 2960, No. 1, p. 020005). AIP Publishing LLC. https://doi.org/10.1063/5.0183062
• Singh, A., Ahmed, S.*, Kishore, H., Quamar, M.D., Tiwari, R., Nirala, C.K., and Singh, H., 2021, December. Fabrication of shoulder features on tungsten carbide made FSP tool through RµEDM process - A feasibility study. In International Conference on Advancements and Futuristic Trends in Mechanical and Materials Engineering (AFTMME), IIT Ropar, India.
• Ahmed, S.*, Mukhopadhyay, A. and Saha, P., 2019, November. On increasing productivity of micro-friction stir welding with aid of tool shoulder micro-features. In ASME International Mechanical Engineering Congress and Exposition (Vol. 59377, p. V02AT02A008). American Society of Mechanical Engineers. https://doi.org/10.1115/IMECE2019-11445
• Ahmed, S.* and Saha, P., 2018, June. On demands of ultra-thin workpieces for obtaining a sound friction stir weld. In Proceedings of 12th International Symposium on Friction Stir Welding (12ISFSW), TWI, Chicoutimi, Canada (4B Performance I, p. 1-14). 
• Ahmed, S.* and Saha, P., 2017, December. Study of process parameters and joint properties in friction stir welding of thin and ultra-thin aluminium alloy 6061-T6 sheets. In Proceedings of the 10th International Conference on Precision, Meso, Micro and Nano Engineering (COPEN 10), IIT Madras, India (p. 271-274).
• Ahmed, S.* and Saha, P., 2017, July. Parametric study on friction stir welding of ultra-thin aluminium alloy 6061-T6 sheets. In Proceedings of International Conference on Manufacturing Technology and Simulation, IIT Madras, India (p. 200-204).
• Ahmed, S.* and Saha, P., 2015, December. Downscaling the Process of Friction Stir Welding: An Analysis of Temperature Distributions. In Proceedings of 23rd National Heat and Mass Transfer Conference & 1st International ISHMT-ASTFE Heat and Mass Transfer Conference, LPSC (ISRO), Trivandrum, Kerala, India (1127, p. 1-8).

• MEC443 Manufacturing with Non-metals (Monsoon 2021)
• MEC302 Design, Materials and Manufacturing (Monsoon 2021, 2022, 2023, 2024)
• MEC205 Materials and Process of Manufacture (Winter 2022, 2023, 2024)
• MEC405 Learning Factory Project (Monsoon 2022, 2023 & Winter 2023, 2024)
• ENR114 Engineering Visualization and Drawing (Monsoon 2024, 2025 & Winter 2025, 2026)
• FDP104 Water - Module 3 (Monsoon 2024)
• FDP102 Environment and Climate Change - Module 1 (Monsoon 2025)
• MEC207/MEC208 Materials and Manufacturing Processes - I/II (Monsoon 2025)
• MEC700 Advanced Materials and Manufacturing Processes (Monsoon 2025)
• MEC311 Materials and Manufacturing Processes Laboratory (Winter 2026)
• MEC408 Additive Manufacturing (Winter 2026)

• Role - Principal Investigator
  Funding Agency - SEED Grant, Ahmedabad University
  Title - Analysis of additive manufacturing of metals and composites by WAAM and FDM processes, respectively
  Duration - 2 years (2023-25)
  Present Status - Completed
  Funding amount - INR 4.8 lakhs
• Role - Project Lead
  Funding Agency - Maker Bhavan Foundation and AIA Engineering Ltd.
  Title - Tinkerers’ Laboratory.
  Duration - 5 years
  Present Status - Ongoing (2024-29)
  Funding amount - INR 40 lakhs