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Aging behavior and precipitates analysis of the Cu–Cr–Zr–Ce alloy

Author:
Zhang, Yi   Volinsky, Alex A.   Tran, Hai T.   Chai, Zhe   Liu, Ping   Tian, Baohong   Liu, Yong  


Journal:
Materials Science and Engineering: A


Issue Date:
2016


Abstract(summary):

Abstract

Microstructure of the Cu–Cr–Zr–Ce alloy was investigated by high resolution transmission electron microscopy (HRTEM), along with micro-hardness and electrical conductivity measurements. The alloy hardness and electrical conductivity can reach 170 HV and 66% IACS, respectively, after 80% cold rolling and aging for 16 h at 300 °C. Under the same aging conditions, without cold rolling, the hardness is 90 HV and electrical conductivity is 44% IACS. Two kinds of Cr and Cu4Zr precipitates were identified by TEM characterization after aging at 400 °C for 8 h. HRTEM microstructure analysis shows the presence of chromium-rich particles after aging for 18 h at 300 °C. Precipitates with ordered fcc structure are coherent with the matrix. Most of the precipitates are club-shaped chromium-rich particles, around 10–15 nm in size. The phase transformation kinetics was determined during aging. This study explored optimized processing conditions of the Cu–Cr–Zr–Ce alloy.



Page:
248-253


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