半固态ZCuSn10P1铜合金压缩行为及组织演变  

Compression behavior and microstructure evolution of semi-solid ZCuSn10P1 copper alloy

作　　者：肖寒[1] 陈磊 张雄超 李乃拥 周荣锋[1] XIAO Han;CHEN Lei;ZHANG Xiong-chao;LI Nai-yong;ZHOU Rong-feng(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《材料热处理学报》2021年第11期37-45,共9页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51965028);云南省基础研究计划项目(202001AT070031)。

摘　　要：采用“冷轧-部分重熔”技术制备半固态ZCuSn10P1铜合金浆料,利用Gleeble-3500型热/力学模拟试验机对半固态ZCuSn10P1铜合金进行单向压缩试验,研究半固态ZCuSn10P1铜合金压缩变形时液固两相协同变形行为和组织演变规律。结果表明:半固态ZCuSn10P1铜合金单向压缩变形后,近球状固相晶粒会变为纤维状或胞状晶。半固态ZCuSn10P1铜合金在应变速率为1 s^(-1)条件下从350℃到880℃等温压缩后显微组织发生变形,其主要变形机制为:固相粒子的塑性变形机制(PDS)、固相粒子之间的滑移机制(SS)、液固相混合流动机制(FLS)和液相流动机制(LF)。半固态ZCuSn10P1铜合金在压缩过程中,应变速率越大,所承受的变形抗力越大,试样被破坏程度越大,当压缩变形温度较高时,半固态ZCuSn10P1铜合金发生沿晶断裂。The semi-solid ZCuSn10P1 copper alloy slurry was prepared by“cold rolling and partial remelting”strain-induced melting activation(SIMA)method,the unidirectional compression experiment of the semi-solid ZCuSn10P1 copper alloy was carried out by Gleeble-3500 thermal-mechanical simulation tester,and the behavior of liquid-solid two-phase cooperative deformation and microstructure evolution of the semi-solid ZCuSn10P1 copper alloy during compression deformation were studied.The results show that the nearly spherical solid-phase crystal grains of the semi-solid ZCuSn10P1 copper alloy change into fibrous or cellular grains after unidirectional compression deformation.The microstructure of the semi-solid ZCuSn10P1 copper alloy is deformed after isothermal compression at 350℃-880℃with strain rate of 1 s^(-1),and the main deformation mechanisms are:plastic deformation of solid particles(PDS),sliding between solid particles(SS),flow of liquid incorporating solid particles(FLS)and liquid-phase flow(LF).During the compression process,the greater the strain rate,the greater the deformation resistance and the greater the damage degree of the semi-solid ZCuSn10P1 copper alloy.When the compression deformation temperature is higher,the intergranular fracture occurs in the semi-solid ZCuSn10P1 copper alloy.

关 键 词：ZCuSn10P1铜合金 半固态压缩 组织演变 变形机制 变形行为 

分 类 号：TG146.1[一般工业技术—材料科学与工程]