李炎,陈小红,刘平,高林华,田保红

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室
• 3:上海理工大学机械工程学院

摘要(Abstract)：

通过冷拉变形结合中间退火的方法把Cu-Cr双相合金制备成纤维增强原位复合材料,用扫描电镜和高分辨透射电镜观察Cu-Cr双相合金在不同应变量下的组织形态变化。结果表明,随着应变量的增大,在垂直于拉拔方向上等轴状Cu相晶粒逐步细化,粒状Cr相晶粒逐步变薄,成为弯曲、扭折的薄片状;在平行于拉拔方向上Cu相与Cr相均逐渐伸长成纤维状。纵、横截面综合来看,Cu-Cr双相合金经冷拉变形后转变为丝状Cu纤维和丝带状Cr纤维的复合材料。Cu-Cr两相界面匹配关系为(111)Cu//(011)Cr,为共格或半共格界面;当应变量η=6.4时,纤维的长轴方向//[111]Cu//[011]Cr//拉拔轴。变形过程中Cu纤维形成了〈111〉织构,Cr纤维形成了〈011〉织构。

关键词(KeyWords)： 冷拉变形;组织形态;界面关系;织构;铜-铬合金

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50571035)

作者(Author): 李炎,陈小红,刘平,高林华,田保红

DOI: 10.13289/j.issn.1009-6264.2011.02.018

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