Jeyaprakash Natarajan is an Associate Professor in School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou City, China. He received his PhD in Production Engineering in 2018 from National Institute of Technology, Tiruchirappalli, India. Dr. Natarajan has published more than 75 peer-reviewed research articles, book chapters and two books titled Laser Surface Treatments for Tribological Application and Advances in Additive Manufacturing Processes in 2021. He teaches various postgraduate courses in automotive, mechanical, manufacturing and laser ultrasound, and conducts academic research and consultancy. He is serving as a reviewer for many reputed international journals. Also, he has completed four research projects in the field of additive manufacturing, surface engineering, tribology, laser cladding and corrosion etc. Dr. K. Anton Savio Lewise is an Assistant Professor in Department of Aerospace Engineering, Karunya Institute of Technology and Sciences, Coimbatore, India. He received his PhD in Aeronautical Engineering in 2022 from Noorul Islam Centre for Higher Education, Kumaracoil, Tamilnadu, India. He has published more than 20 peer-reviewed research articles, book chapters, patents and conference proceedings. He teaches various undergraduate and postgraduate courses in aeronautical, aerospace, mechanical, manufacturing and conducts academic research and consultancy. Dr. Lewise is serving as a reviewer for many reputed international journals.

• 1. Introduction. 2. Interlayers in FSSW process - An overview. 3. Process Parameter Optimization during the Friction Stir Spot Welding Process. 4. Types of Tool Geometry. 5. Interlayer Morphology of friction stir spot welding. 6. Mechanical properties evolution in FSSW. 7. Metallurgical Transition. 8. Thermomechanical analysis. 9. Wear characterization of friction stir spot welded joint material. 10. Mechanical Properties and Temperature Distribution of Friction stir spot welding Process. 11. Residual stress in FSSW process. 12. Corrosion in Friction Stir Welded joints. 13. Nanoparticle reinforcements in Friction Stir Spot Welding (n-FSSW). 14. Challenges and Application of Friction Stir Spot Welding of dissimilar Al joints. 15. Advances in Friction Stir Spot Welding. 16. Nano particles reinforcements via friction stir processing (FSP). 17. Effect of tool geometry on friction stir spot welded joints. 18. Wettability and Corrosion Resistance on Hydrophobic Steel Surfaces.

Jeyaprakash Natarajan is an Associate Professor in School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou City, China. He received his PhD in Production Engineering in 2018 from National Institute of Technology, Tiruchirappalli, India. Dr. Natarajan has published more than 75 peer-reviewed research articles, book chapters and two books titled Laser Surface Treatments for Tribological Application and Advances in Additive Manufacturing Processes in 2021. He teaches various postgraduate courses in automotive, mechanical, manufacturing and laser ultrasound, and conducts academic research and consultancy. He is serving as a reviewer for many reputed international journals. Also, he has completed four research projects in the field of additive manufacturing, surface engineering, tribology, laser cladding and corrosion etc. Dr. K. Anton Savio Lewise is an Assistant Professor in Department of Aerospace Engineering, Karunya Institute of Technology and Sciences, Coimbatore, India. He received his PhD in Aeronautical Engineering in 2022 from Noorul Islam Centre for Higher Education, Kumaracoil, Tamilnadu, India. He has published more than 20 peer-reviewed research articles, book chapters, patents and conference proceedings. He teaches various undergraduate and postgraduate courses in aeronautical, aerospace, mechanical, manufacturing and conducts academic research and consultancy. Dr. Lewise is serving as a reviewer for many reputed international journals.

• 1. Introduction. 2. Interlayers in FSSW process - An overview. 3. Process Parameter Optimization during the Friction Stir Spot Welding Process. 4. Types of Tool Geometry. 5. Interlayer Morphology of friction stir spot welding. 6. Mechanical properties evolution in FSSW. 7. Metallurgical Transition. 8. Thermomechanical analysis. 9. Wear characterization of friction stir spot welded joint material. 10. Mechanical Properties and Temperature Distribution of Friction stir spot welding Process. 11. Residual stress in FSSW process. 12. Corrosion in Friction Stir Welded joints. 13. Nanoparticle reinforcements in Friction Stir Spot Welding (n-FSSW). 14. Challenges and Application of Friction Stir Spot Welding of dissimilar Al joints. 15. Advances in Friction Stir Spot Welding. 16. Nano particles reinforcements via friction stir processing (FSP). 17. Effect of tool geometry on friction stir spot welded joints. 18. Wettability and Corrosion Resistance on Hydrophobic Steel Surfaces.

Jeyaprakash Natarajan is an Associate Professor in School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou City, China. He received his PhD in Production Engineering in 2018 from National Institute of Technology, Tiruchirappalli, India. Dr. Natarajan has published more than 75 peer-reviewed research articles, book chapters and two books titled Laser Surface Treatments for Tribological Application and Advances in Additive Manufacturing Processes in 2021. He teaches various postgraduate courses in automotive, mechanical, manufacturing and laser ultrasound, and conducts academic research and consultancy. He is serving as a reviewer for many reputed international journals. Also, he has completed four research projects in the field of additive manufacturing, surface engineering, tribology, laser cladding and corrosion etc. Dr. K. Anton Savio Lewise is an Assistant Professor in Department of Aerospace Engineering, Karunya Institute of Technology and Sciences, Coimbatore, India. He received his PhD in Aeronautical Engineering in 2022 from Noorul Islam Centre for Higher Education, Kumaracoil, Tamilnadu, India. He has published more than 20 peer-reviewed research articles, book chapters, patents and conference proceedings. He teaches various undergraduate and postgraduate courses in aeronautical, aerospace, mechanical, manufacturing and conducts academic research and consultancy. Dr. Lewise is serving as a reviewer for many reputed international journals.

• 1. Introduction. 2. Interlayers in FSSW process - An overview. 3. Process Parameter Optimization during the Friction Stir Spot Welding Process. 4. Types of Tool Geometry. 5. Interlayer Morphology of friction stir spot welding. 6. Mechanical properties evolution in FSSW. 7. Metallurgical Transition. 8. Thermomechanical analysis. 9. Wear characterization of friction stir spot welded joint material. 10. Mechanical Properties and Temperature Distribution of Friction stir spot welding Process. 11. Residual stress in FSSW process. 12. Corrosion in Friction Stir Welded joints. 13. Nanoparticle reinforcements in Friction Stir Spot Welding (n-FSSW). 14. Challenges and Application of Friction Stir Spot Welding of dissimilar Al joints. 15. Advances in Friction Stir Spot Welding. 16. Nano particles reinforcements via friction stir processing (FSP). 17. Effect of tool geometry on friction stir spot welded joints. 18. Wettability and Corrosion Resistance on Hydrophobic Steel Surfaces.