Towards attaining dissimilar lap joint of CuCrZr alloy and 316L stainless steel using friction stir welding

Abstract

CuCrZr alloy (Cu-0.8wt-%Cr-0.1wt-%Zr) and 316L stainless steel (Fe-0.03wt-%C-16wt-%Cr-10wt-%Ni) plates were successfully friction stir lap welded resulting in significant mechanical mixing of the two matrix elements, Cu and Fe, in the stir zone. The severe mixing not only led to improved load bearing response but also leads to form Cu-rich and Fe-rich regions in the weld nugget. The formation of these phases governs the failure mechanism of the joint. Tensile properties of the weld showed promising response when compared with joints made for the similar alloy pair by other welding techniques. This suggests strong feasibility of applying FSW for joining Cu and steel for nuclear applications.

Publication
Science and Technology of Welding and Joining, 23(8)(715-720)
P. Sahlot, S. S. Nene, M. Frank, R. S. Mishra, and A. Arora. Towards attaining dissimilar lap joint of CuCrZr alloy and 316L stainless steel using friction stir welding. Science and Technology of Welding and Joining, 23(8) (2018): 715-720.
Pankaj Sahlot
Assistant Professor

Dr. Pankaj Sahlot is Assistant Professor in Mechanical Engineering Department at Pandit Deendayal Petroleum University Gandhinagar, India. In PhD, He worked on experimental and numerical study of tool wear during Friction stir welding (FSW) under the guidance of Dr. Amit Arora at IIT Gandhinagar, India. He also visited University of North Texas Denton, USA for six months as a visiting researcher during PhD. His research work related to experimental and numerical study of Friction Stir Welding processes has been published in various reputed journals and conferences. He received award for Academic Excellence from Prof. C. N. R. Rao during M.Tech at IIT Hyderabad, India.

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