Dr. Santosh Kumar is Professor in the Department of Mechanical Engineering, Indian Institute of Technology (BHU), Varanasi since 1992. He is fellow IE (India) and presently Chairman and Coordinator of Teaching-Learning Cell at IIT BHU. He has received his Master’s and Ph.D. Degrees form IIT Kanpur. He has published nearly 100 international and national journal papers. He has completed Sixteen sponsored research projects, and four projects are in progress. He has developed four new machines from scratch for government organization; out of which three are patented. He has attended several International conferences and has been involved in national/internations programs.Dr. V. Prabhu Raja is a professor in the Department of Mechanical Engineering, PSG College of Technology, Coimbatore. He also worked at the Engineering Research Centre of TATA Motors, Pune. He has been teaching in the technical institution since 1997. His research area includes structural integrity, finite element analysis, thermos-mechanical modelling and analysis and high-speed machining. He has been awarded many funded projects from BRNS, DST, IGCAR, etc. He also worked on many consultancy projects. He has published 53 research papers in international journals, 13 in national journals, 58 conference papers.Dr. P. Sharma is an assistant professor in the Department of Mechanical Engineering, Indian Institute of Technology (BHU) VARANASI. Prior to joining IIT (BHU), he served four more institutions. He obtained his PhD from IIT (Delhi) in 2019. He is a gold medalist of MNNIT (Allahabad) in master's program. He has published more than ten research papers in international journals and many in conferences. He has been granted two patents. He has contributed many chapters in various books and worked as editors of books.Dr. G. M. Karthik is an assistant professor in the Mechanical Engineering Department, IIT(BHU) VARANASI, UP. He completed BTech from V R Siddhartha Engineering College, MTech from NIT Tiruchirappalli, and PhD from IIT Madras. His research interests include additive manufacturing and materials joining. He published more than 37 papers in international journals and many more at national conferences. He is a recipient of many awards. He has filed one patent.

• Chapter 1: Additive manufacturing of Stainless steel 316L by Fused deposition modelling.- Chapter 2: Analysis and Fabrication of Functionally Graded Prosthetic Socket using Fused Filament Fabrication.- Chapter 3: A New Method for Part Consolidation and Functional Integration.- Chapter 4: A novel 5 axis hybrid scissor-based machine tool for additive manufacturing.- Chapter 5: A Numerical Simulation of Ceramic Powder Particles Interaction with Laser Powder Feed Additive Manufacturing.- Chapter 6: A simulation based degradation study of 3D printed Ti6Al4V screw and plate implant.- Chapter 7: Computational analysis of additively-manufactured tablets with hybrid infill pattern.- Chapter 8: Design, Simulation, and Testing of 3D printed Auxetic structure for Vibration Isolation.- Chapter 9: Development of CNN Framework for Surface Defect Analysis in WAAM of Bio-Compatible Ti6Al4V.- Chapter 10: Direct Ink Writing of Medical Grade Silicon Nitride: A review of material, method, applications and challenges.- etc.