Journals

Khan, N.A., Chakraborty, D., Srivatsan, T.S. et al. Recent Progress in the Friction Stir Additive Manufacturing: Process Parameters, Microstructural Evolution, and Mechanical Performance. Trans Indian Inst Met 78, 219 (2025). Link 

Khan, Nisar Ahamad, Dipayan Chakraborty, and Ajay Kumar. "Mechanical and Microstructural Behavior of Friction Stir Powder Additive Manufactured Ceria-Stabilized Zirconia and Polymer-Derived Ceramic Reinforced AA7075 Composites." Materials Science and Engineering: A (2025). Link

Khan, Nisar Ahamad, Dipayan Chakraborty, and Ajay Kumar. "Effect of Solution Heat Treatment on Corrosion Performance of Multi-pass Friction Stir Processed AA6061/Ceria-Stabilized Zirconia Composites for Marine Applications." Journal of Materials Engineering and Performance (2025): 1-13. Link

Chakraborty, Dipayan, Nisar Ahamad Khan, BR Chandra Obul Reddy, and Ajay Kumar. "Comprehensive Study on Hot Deformation Behaviour and Mechanism of Ti-900 Alloy: Insights from Experimental Study, Neural Network Modeling and Finite Element Simulation." Journal of Alloys and Compounds (2025): 180495. Link

Polamuri, Sudheer Kumar, Avinash Mishra, Srihari Chitral, Venkata Kiran Degala, and Ajay Kumar. "Thermal–mechanical analysis of Ti-6Al-4V components in wire-arc directed energy deposition using a novel in situ trapezoidal-parallelogram overlapping (TPO) model." Progress in Additive Manufacturing (2025): 1-20. Link

Behera, Swaroop, Ajay Kumar, Amir Kordijazi, David Weiss, and Pradeep K. Rohatgi. “Tribological analysis and machine learning modeling of nickel-coated graphite reinforced A206 metal matrix composites.” Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications (2024): 14644207241292819. Link

Tirumala, Tumula, Ajay Kumar. “Reverse Cladding of Austenitic Stainless Steel to Aluminium-Silicon Alloy Through the Casting Route.” Indian Foundry Journal VOL 70, ISSUE 6, JUN 2024: pg 30-33.  

Chakraborty, Dipayan, Akanksha Prajapati, BR Chandra Obul Reddy, and Ajay Kumar. “High temperature deformation characteristics, processing maps and microstructural development of Ti-900 alloy.” ASM Materials and Processing Journal VOL 1, Issue 2 October 2024. Link

Tirumala, Tumula, Ajay Kumar, and Chandra Shekhar Perugu. “Reverse cladding of 304 stainless steel to LM25 aluminium alloy through die-casting.” Materials Letters (2023): 134896. Link  

Chakraborty, Dipayan, Gyan Shankar, Akanksha Prajapati, BR Chandra Obul Reddy, and Ajay Kumar. “Hot deformation characteristics and microstructural evolution of Ti-900 alloy.” Materials Letters (2023): 135546. Link

Rane, Kaustubh, Swaroop Behera, Amir Kordijazi, Ajay Kumar, Benjamin Church, Rathindra Dasgupta, and Pradeep Rohatgi. “Residual Stress, Adhesion, Hardness, and Corrosion Resistance of Surface Alloyed Layer Formed during Sand Casting of Mild Steel.” Journal of Materials Engineering and Performance 32, no. 11 (2023): 4823-4833. Link 

Chakraborty, Dipayan, Tumula Tirumala, Srihari Chitral, B. N. Sahoo, D. V. Kiran, and Ajay Kumar. “The state of the art for wire arc additive manufacturing process of titanium alloys for aerospace applications.” Journal of Materials Engineering and Performance 31, no. 8 (2022): 6149-6182. Link  

Rane, Kaustubh, Michael Beining, Swaroop Behera, Amir Kordijazi, Ajay Kumar, and Pradeep Rohatgi. “Sand casting of surface alloyed butterfly valve with improved hardness and corrosion resistance by incorporating metal powders in-mold coatings.” International Journal of Metalcasting 16, no. 1 (2022): 359-369. Link 

Arafat, Y., H. Yang, I. Dutta, Ajay Kumar, and B. Datta. “A model for intermetallic growth in thin Sn joints between Cu substrates: application to solder microjoints.” Journal of Electronic Materials 49 (2020): 3367-3382. Link

Ajay Kumar, Joshi, Gaurang, and Kush P. Mehta. “Fabrication and applications of fullerene-based metal nanocomposites: A review.” Journal of Materials Research 36, no. 1 (2021): 114-128. Link

Prabu, SS Mani, Chandra S. Perugu, Ashutosh Jangde, H. C. Madhu, M. Manikandan, Manoj D. Joshi, Santosh S. Hosmani, Ajay Kumar, Satish V. Kailas, and I. A. Palani. “Investigations on the influence of surface mechanical attrition treatment on the corrosion behaviour of friction stir welded NiTi shape memory alloy.” Surface and Coatings Technology 402 (2020): 126495. Link

Rohatgi, Pradeep K., Ajay Kumar, Nagaraj M. Chelliah, and T. P. D. Rajan. “Solidification processing of cast metal matrix composites over the last 50 years and opportunities for the future.” JOM 72 (2020): 2912-2926. Link

Tabandeh-Khorshid, Meysam, Ajay Kumar, Emad Omrani, Chngsoo Kim, and Pradeep Rohatgi. “Synthesis, characterization, and properties of graphene reinforced metal-matrix nanocomposites.” Composites Part B: Engineering 183 (2020): 107664. Link

Kumar Ajay, H. C. Madhu, Abhishek Pariyar, Chandra S. Perugu, Satish V. Kailas, Uma Garg, and Pradeep Rohatgi. “Friction stir processing of squeeze cast A356 with surface compacted graphene nanoplatelets (GNPs) for the synthesis of metal matrix composites.” Materials Science and Engineering: A 769 (2020): 138517. Link

Ajay Kumar, Pradeep Rohatgi, and David Weiss. “50 years of foundry-produced metal matrix composites and future opportunities.” International Journal of Metalcasting 14, no. 2 (2020): 291-317. Link

Behera, Swaroop K., Ajay Kumar, Neil Dogra, Michael Nosonovsky, and Pradeep Rohatgi. “Effect of microstructure on contact angle and corrosion of ductile iron: Iron–graphite composite.” Langmuir 35, no. 49 (2019): 16120-16129. Link

Prabu, SS Mani, Chandra S. Perugu, H. C. Madhu, Ashutosh Jangde, Sohel Khan, S. Jayachandran, M. Manikandan, Ajay Kumar, Satish V. Kailas, and I. A. Palani. “Exploring the functional and corrosion behavior of friction stir welded NiTi shape memory alloy.” Journal of Manufacturing Processes 47 (2019): 119-128. Link

Prabu, SS Mani, H. C. Madhu, Chandra S. Perugu, K. Akash, R. Mithun, Ajay Kumar, Satish V. Kailas, Manivannan Anbarasu, and I. A. Palani. “Shape memory effect, temperature distribution and mechanical properties of friction stir welded nitinol.” Journal of Alloys and Compounds 776 (2019): 334-345. Link

Pan, Liwen, Yi Yang, Muhammad Usman Ahsan, Dung Dinh Luong, Nikhil Gupta, Ajay Kumar, and Pradeep K. Rohatgi. “Zn-matrix syntactic foams: Effect of heat treatment on microstructure and compressive properties.” Materials Science and Engineering: A 731 (2018): 413-422. Link   

Ajay Kumar and I. Dutta. “Effect of intermetallic content on shear deformation of thin Sn-3.0 Ag-0.5 Cu solder micro-joints between copper substrates.” Journal of Electronic Materials 47 (2018): 5488-5497. Link

Vishnu, Namboodiri V., Pottirayil Anirudhan, and Kumar Ajay. “Wear behavior of friction stir processed NAB alloys in marine environment.” Tribology Online 13, no. 3 (2018): 75-80. Link

Ajay Kumar, and Chandra S. Perugu. “Synthesis of fecrvnbmn high entropy alloy by mechanical alloying and study of their microstructure and mechanical properties.” In TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings, pp. 669-675. Springer International Publishing, 2018. Link

Madhu, H. C., Ajay Kumar, Chandra S. Perugu, and Satish V. Kailas. “Microstructure and mechanical properties of friction stir process derived Al-TiO2 nanocomposite.” Journal of Materials Engineering and Performance 27 (2018): 1318-1326. Link

Kumar, Ajay, Gajendra Dixit, Aruna Patel, and S. Das. “ROLLING BEHAVIOUR OF ALUMINUM ALLOY 2014-10wt% SiCp METAL MATRIX COMPOSITES.” (2018). DOI 10.7449/2018/MST_2018_1296_1303  Link

Ajay Kumar, and S. V. Kailas. “Evolution of In-Situ Nano-Pores during Friction Stir Processing of Polymer Derived Ceramic Reinforced Metal Matrix Composites.” Res Rep Metals 1 4 (2017): 2. Link

Prabu, SS Mani, H. C. Madhu, Chandra S. Perugu, K. Akash, Ajay Kumar, Satish V. Kailas, Manivannan Anbarasu, and I. A. Palani. “Microstructure, mechanical properties and shape memory behaviour of friction stir welded nitinol.” Materials Science and Engineering: A 693 (2017): 233-236. Link

Kumar, Ajay, Devinder Yadav, Chandra S. Perugu, and Satish V. Kailas. “Influence of particulate reinforcement on microstructure evolution and tensile properties of in-situ polymer derived MMC by friction stir processing.” Materials & Design 113 (2017): 99-108. Link

Kumar, Ajay, Rishi Raj, and Satish V. Kailas. “A novel in-situ polymer derived nano ceramic MMC by friction stir processing.” Materials & Design 85 (2015): 626-634. Link

Ajay Kumar, Satish Kailas, Tribological Performance of a Copper Based Composite Produced by Friction Stir Processing. Technology Letters CP0001 2014; 371 p.