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Influence of pre-deformation on aging precipitation and mechanical properties of Cu-Ag alloy
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Key Laboratory of Electromagnetic Processing of Materials Ministry of Education,Northeastern University,Shenyang

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    Abstract:

    Cu-Ag alloy is a kind of high-strength and high-conductivity alloy with important application prospects. The improvement of the properties of Cu-Ag alloy depends on the development of the deformation and heat-treatment process. However, the effect of pre-deformation before the heat treatment has not been investigated. The effects of pre-deformation on microstructure and properties after solid solution were investigated using XRD analysis, Vickers hardness, conductivity, metalloscope and scanning electron microscopy. The results show that pre-deformation promotes the recrystallization of Cu-6Ag alloy, and the grain size is obviously reduced. Meanwhile, the pre-deformation reduces the amount of Ag in Cu-6 wt% Ag alloy after aging treatment. Discontinuous precipitates are observed in samples with or without pre-deformation. The discontinuous precipitation in the pre-deformed alloy has a smaller spacing of 95±9.5nm. The hardness in pre-deformation alloy is 85.8 HV lower than that in unpre-deformation alloy. The conductivity of pre-deformed alloy is almost equal to unpre-deformation alloy which is, 90.3%IACS.

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[Du Jingwen, An Bailing, Zhang lin, Wang Engang. Influence of pre-deformation on aging precipitation and mechanical properties of Cu-Ag alloy[J]. Rare Metal Materials and Engineering,2023,52(1):403~408.]
DOI:10.12442/j. issn.1002-185X.20220329

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History
  • Received:April 19,2022
  • Revised:August 28,2022
  • Adopted:September 22,2022
  • Online: February 13,2023
  • Published: February 08,2023