Microstructure and properties of aging Cu–Cr–Zr alloy  

作　　者：Kun Wang Ke-Fu Liu Jing-Bo Zhang 

机构地区：[1]Institute of Electric Lighting Source, Fudan University [2]No.23 Research Institute, China Electronics Technology Group Corporation [3]No. 23 Research Institute, China Electronics Technology Group Corporation

出　　处：《Rare Metals》2014年第2期134-138,共5页稀有金属（英文版）

基　　金：financially supported by the Special Foundation for Technology Research and Development in Research Institute of China (No. 2011DIA5k023)

摘　　要：The crystallography and morphology of precipitate particles in a Cu matrix were studied using an aged Cu–Cr–Zr alloy by transmission electron microscopy（TEM） and high-resolution transmission electron microscopy（HRTEM）. The tensile strength and electrical conductivity of this alloy after various aging processes were tested. The results show that two kinds of crystallographic structure associated with chromium-rich phases, fcc and bcc structure, exist in the peak-aging of the alloy. The orientation relationship between bcc Cr precipitate and the matrix exhibits Nishiyama–Wasserman orientation relationship. Two kinds of Zr-rich phases（Cu4Zr and Cu5Zr）can be identified and the habit plane is parallel to {111}Cu plane during the aging. The increase in strength is ascribed to the precipitation of Cr- and Zr-rich phase.The crystallography and morphology of precipitate particles in a Cu matrix were studied using an aged Cu–Cr–Zr alloy by transmission electron microscopy（TEM） and high-resolution transmission electron microscopy（HRTEM）. The tensile strength and electrical conductivity of this alloy after various aging processes were tested. The results show that two kinds of crystallographic structure associated with chromium-rich phases, fcc and bcc structure, exist in the peak-aging of the alloy. The orientation relationship between bcc Cr precipitate and the matrix exhibits Nishiyama–Wasserman orientation relationship. Two kinds of Zr-rich phases（Cu4Zr and Cu5Zr）can be identified and the habit plane is parallel to {111}Cu plane during the aging. The increase in strength is ascribed to the precipitation of Cr- and Zr-rich phase.

关 键 词：Cu–Cr–Zr alloy Aging process Crystallography Morphology Strengthening mechanism 

分 类 号：TG146.11[一般工业技术—材料科学与工程]