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

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:650

Article

Zhang, Yi^1,2,4  Volinsky, Alex A.²  Tran, Hai T.²  Chai, Zhe^1,3  Liu, Ping³  Tian, Baohong^1,4  Liu, Yong^1,4 

[1] Henan Univ Sci & Technol, Coll Mat Sci & Engn, Luoyang 471003, Peoples R China

[2] Univ S Florida, Dept Mech Engn, Tampa, FL 33620 USA

[3] Univ Shanghai Sci & Technol, Coll Mat Sci & Engn, Shanghai 200093, Peoples R China

[4] Collaborat Innovat Ctr Nonferrous Met, Luoyang 471003, Henan Province, Peoples R China

关键词: Cu-Cr-Zr-Ce alloy;    Cold rolling;    Aging treatment;    Microstructure;    Physical properties;   

DOI  :  10.1016/j.msea.2015.10.046

来源: Elsevier

【 摘 要 】

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 degrees 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 degrees C for 8 h. HRTEM microstructure analysis shows the presence of chromium-rich particles after aging for 18 h at 300 degrees 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. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free