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

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• 作者：Yi Zhang^a ; ^b ; ^d ; ^{zhshgu436@163.com" class="auth_mail" title="E-mail the corresponding author} ; Alex A. Volinsky^b ; ^{volinsky@usf.edu" class="auth_mail" title="E-mail the corresponding author} ; Hai T. Tran^b ; Zhe Chai^a ; ^c ; Ping Liu^c ; Baohong Tian^a ; ^d ; Yong Liu^a ; ^d
• 关键词：Cu&ndash ; Cr&ndash ; Zr&ndash ; Ce alloy ; Cold rolling ; Aging treatment ; Microstructure ; Physical properties
• 刊名：Materials Science & Engineering A
• 出版年：2016
• 出版时间：5 January 2016
• 年：2016
• 卷：650
• 期：Complete
• 页码：248-253
• 全文大小：3937 K

文摘

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.