A high strength and high electrical conductivity Cu-Cr-Zr alloy fabricated by cryogenic friction stir processing and subsequent annealing treatment

A bulk Cu-0.55Cr-0.2Zr alloy with structure of ultra-fined grains (UFGs), nanograins (NGs) and nano precipitates in grain boundaries (GBs) was fabricated by cryogenic friction stir processing (CFSP) followed with annealing treatment. A combination of high strength, pronounced electrical conductivity, and good microstructure thermal and mechanical stability was achieved.