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

Xiaohong Chen; Honglei Zhou; Tao Zhang; Liming Bi; Wei Tian; Shaoli Fu; Wei Li; Xinkuan Liu; Fengcang Ma; Ke Zhang; Hao Sun; Ping Liu

Materials & Design (Oct 2019)

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

Xiaohong Chen,
Honglei Zhou,
Tao Zhang,
Liming Bi,
Wei Tian,
Shaoli Fu,
Wei Li,
Xinkuan Liu,
Fengcang Ma,
Ke Zhang,
Hao Sun,
Ping Liu

Affiliations

Xiaohong Chen: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Honglei Zhou: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Tao Zhang: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Liming Bi: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Wei Tian: College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
Shaoli Fu: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Wei Li: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Xinkuan Liu: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Fengcang Ma: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Ke Zhang: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Hao Sun: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Ping Liu: School of Material Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; Corresponding author.

Journal volume & issue: Vol. 180

Abstract

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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. Keywords: CuCr alloy, Interface structure, Chemical mixing, Conductive mechanism, Strengthening mechanism

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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