Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 31    No. 12    December 2021

[PDF Download]        

    

Effect of elevated-temperature annealing on microstructure and properties of Cu-0.15Zr alloy
Zi-chen ZHANG1, Ri-chu WANG1,2, Chao-qun PENG1, Yan FENG1,2, Xiao-feng WANG1,2, Xiang WU3, Zhi-yong CAI1,2

1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Hunan Province Key Laboratory of Electronic Packaging and Advanced Functional Materials, Central South University, Changsha 410083, China;
3. College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China

Abstract:Cu-0.15Zr (wt.%) alloy with uniform and fine microstructure was fabricated by rapid solidification followed by hot forging. Evolution of microstructure, mechanical properties and electrical conductivity of the alloy during elevated-temperature annealing were investigated. The alloy exhibits good thermal stability, and its strength decreases slightly even after annealing at 700 °C for 2 h. The nano-sized Cu5Zr precipitates show significant pinning effect on dislocation moving, which is the main reason for the high strength of the alloy. Additionally, the large-size Cu5Zr precipitates play a major role in retarding grain growth by pinning the grain boundaries during annealing. After annealing at 700 °C for 2 h, the electrical conductivity of samples reaches the peak value of 88% (IACS), which is attributed to the decrease of vacancy defects, dislocations, grain boundaries and Zr solutes.

 

Key words: Cu-Zr alloy; rapid solidification; annealing; microstructure; tensile strength; electrical conductivity

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com