Investigation of Metallurgical and Mechanical Properties of Dissimilar Friction Stir Welded Pure Copper and AA7075 Joint by using Various Process Parameters, Tool Shape and Tool Material

Authors

  • B. Supraja Reddy, B. Ram Gopal Reddy

Abstract

Aluminum and copper dissimilar joints offers higher electrical and thermal conductivity, corrosion resistance and light weight with high strength for the Aerospace industry. In this investigation to study results of process variables, tool shape and tool material on mechanical and metallurgical properties evolution of dissimilar FS welded pure copper - AA7075 joints. This experiment was carried out at two speeds of 710 rpm and 900rpm with the constant feed of 32mm/min and tilting angle 20 using H13 tool steel and TC (Tungsten Carbide) tools. The outcome of this investigation reported that the tool materials and process variables on mechanical properties achieved by better results compared to fusion welding techniques. Results were observed that for H13 conical tool, the maximum strength welded joint was occurred at tool speed of 710 rpm with feed of 32 mm/min with a tilting angle 20. Microstructure characterization and SEM images of various stirred zones and Thermo mechanical heat affected zones (TMAZ) are observed in Al/Cu dissimilar welded joints.

Keywords - Metallurgical properties, Mechanical properties, FSW, pure copper, AA7075.

Published

2020-12-22

Issue

Section

Articles