半固态ZCuSn10铜合金坯料单向压缩变形行为及显微组织

发布时间：2018-03-18 16:12

本文选题：ZCuSn铜合金　切入点：半固态　出处：《中国有色金属学报》2015年05期 　论文类型：期刊论文

【摘要】：采用Gleeble-1500材料热/力模拟机,对应变诱导熔化激活法(SIMA)制备的不同原始半固态组织的ZCuSn10铜合金进行单向压缩实验。研究预变形量和压缩变形条件对半固态坯料真应力-应变曲线及其组织的影响,并结合ZCuSn10铜合金压缩后的宏观形貌和显微组织对液相的流动规律进行分析。结果表明:随着预变形量和变形温度的增加,流变应力降低。变形温度对半固态ZCuS n10铜合金压缩变形峰值应力影响较大,对稳态应力影响较小。与固态金属压缩变形相同,半固态ZCuSn10铜合金在半固态温度区间压缩变形时,存在3个典型压缩变形区域,即难变形区(Ⅰ区)、大变形区(Ⅱ区)、自由变形区(Ⅲ区),Ⅰ、Ⅱ、Ⅲ区的液相率分别为15.23%、5.31%、20.12%。各个变形区之间发生了液相流动,小部分难变形区内的液相流到大变形区,大部分大变形区内的液相流到自由变形区。
[Abstract]:Using Gleeble-1500 thermal / mechanical simulator, variable activation induced melting (SIMA) corresponding to the preparation of different original semi solid microstructure of ZCuSn10 copper alloy by unidirectional compression. Experimental study of pre deformation and compression deformation of Semi-solid Billets of true stress-strain curves and microstructure, and combining the macro morphology and microstructure ZCuSn10 copper alloy after compression were analyzed in liquid phase flow. The results showed that with the increase of pre deformation and deformation temperature, the flow stress decreases. The deformation temperature of semi-solid ZCuS N10 alloy compression deformation peak stress influence on the steady stress influence. With the same semi solid metal deformation solid ZCuSn10 copper alloy in the semi-solid temperature range compression deformation, there are 3 typical compression deformation, namely hard deformation zone (1), (II) the large deformation zone, free deformation zone (III), 1, II, liquid fraction III were 15.23%, 5.31%, 20.12%. of each deformation zone between the liquid flow, a small part of the hard deformation area in liquid phase flow to large deformation zone, most of the large deformation zone of the liquid flow into the free deformation zone.

【作者单位】：昆明理工大学材料科学与工程学院;昆明理工大学分析测试研究中心;
【基金】：云南省应用基础研究重点项目(2011FA007) 高等学校博士学科点专项科研基金资助项目(20125314120013) 云南省应用基础研究面上项目(2014FB131)
【分类号】：TG146.11

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