15–19 Nov 2021
Fukuoka Convention Center
Asia/Tokyo timezone

High electric conductivity and optimum strength in cold-drawn CuCrZr alloys at 295K and 77K

TUE-OR1-304-06
16 Nov 2021, 11:15
15m
Fukuoka Convention Center

Fukuoka Convention Center

Speaker

Rongmei Niu (National High Magnetic Field Laboratory)

Description

We achieved both high electric conductivity and optimum strength in Cu-0.54Cr-0.046Zr alloy (wt%), and firstly characterized their properties at cryogenic temperature, which was comparable to those of Al60 both at 295K and 77K. Ordered clustering of solute atoms was revealed to be uniformly distributed in solution-treated samples. During deformation, those clusters became the heterogenous nucleation sites for precipitates growing in 2-D layer structure. 2-D layered precipitation had no evident influence on improving the conductivity. Aging treatment led to precipitates growing in 3-D particle shape. And due to the size in a couple of nanometer, aging-induced particle most maintained a coherency relationship with matrix. 3-D clustering had a relative high Cr (1~8 wt%) content, and played a crucial role on doubling the conductivity.

Primary author

Rongmei Niu (National High Magnetic Field Laboratory)

Co-author

Ke Han (Florida State University)

Presentation materials