Mechanism of interaction between the Cu/Cr interface and its chemical mixing on tensile strength and electrical conductivity of a Cu-Cr-Zr alloy

被引：29

作者：

Chen, Xiaohong ^{[1
]}

Zhou, Honglei ^{[1
]}

Zhang, Tao ^{[1
]}

Bi, Liming ^{[1
]}

Tian, Wei ^{[2
]}

Fu, Shaoli ^{[1
]}

Li, Wei ^{[1
]}

Liu, Xinkuan ^{[1
]}

Ma, Fengcang ^{[1
]}

Zhang, Ke ^{[1
]}

Sun, Hao ^{[1
]}

Liu, Ping ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China

[2] Univ Shanghai Sci & Technol, Coll Sci, Shanghai 200093, Peoples R China

来源：

MATERIALS & DESIGN | 2019年 / 180卷

基金：

国家重点研发计划; 美国国家科学基金会;

关键词：

Cu-Cr alloy; Interface structure; Chemical mixing; Conductive mechanism; Strengthening mechanism; WIRE-DRAWN; MICROSTRUCTURE; NB; EVOLUTION; RESISTIVITY; AG; MICROCOMPOSITES; DEFORMATION; CHROMIUM;

D O I：

10.1016/j.matdes.2019.107976

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Deformed Cu-Cr alloys have high strength and high electrical conductivity and are used in highly-pulsed magnetic field coils, power vacuum fuses, and so on. In this paper, Cu-Cr-Zr alloy ingots were prepared by medium-frequency induction smelting. They then underwent a heat treatment, forging, cold drawing, and intermediate annealing to obtain a fiber material with a diameter of 0.8 mm. The Cu/Cr interface, precipitated phase, and Cu/Cr chemical mutual solution zone were observed by transmission electron microscopy. The mechanism by which the Cu/Cr interface affected the Cu-Cr-Zr alloy tensile strength was analyzed. The influence of chemical mixing of the Cu/Cr interface on the conductivity of the Cu-Cr-Zr alloy was also studied. The results showed that the Cu/Cr semi-coherent interface inhibited the formation of dislocations during large deformation, which gave the Cu-Cr-Zr alloy its high strength. Elimination of chemical mixing at the Cu/Cr interface allowed the conductivity of the Cu-Cr-Zr alloy to remain unchanged after extremely large deformation. (C) 2019 The Authors. Published by Elsevier Ltd.

引用

页数：9

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