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[Du Jingwen,An Bailing,Zhang lin and 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.]
Influence of pre-deformation on aging precipitation and mechanical properties of Cu-Ag alloy
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Received:April 19, 2022  Revised:August 28, 2022
Key words: pre-deformation  aging precipitation  discontinuous precipitation  property
Foundation item:国家重点研发计划 (项目号:2017YFE0107900),国家111计划2.0(项目号:BP0719037)
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Du Jingwen,An Bailing,Zhang lin and Wang Engang  
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      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.