毛咏发,林建国,檀朝桂,张德闯,罗致春,李艳

• 1:湘潭大学材料与光电物理学院
• 2:湘潭大学低维材料及其应用技术教育部重点实验室

摘要(Abstract)：

采用ARAMIS三维变形分析测试系统对Zr65Cu20Al10Fe5块体非晶合金在400℃和应变速率为1×10-3s-1条件下的高温拉伸变形行为进行研究,并利用X射线衍射(XRD)对合金试样的显微组织进行分析。结果表明,在变形条件下,该Zr-基非晶合金可表现出良好的塑性,其伸长率为103%,其变形模式为非牛顿流变。用三维变形分析得到的不同变形时刻的应变分布图显示,随着变形量的增加,试样变形变得不均匀,在变形后期会出现颈缩现象。XRD分析结果表明,在拉伸变形过程中,非晶合金试样会发生晶化,其晶化程度与试样不同部位的局部应变量大小有关,局部变形量较大的区域晶化程度较高,而较高含量纳米晶的存在导致了该区域具有较高的变形速率。

关键词(KeyWords)： 非晶合金;ARAMIS三维变形分析测试系统;变形;纳米晶化;非牛顿变形

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(10972190);; 湖南省科技计划重点项目(2012GK2024);; 湖南省大学生创新性实验计划支柱项目

作者(Author): 毛咏发,林建国,檀朝桂,张德闯,罗致春,李艳

DOI: 10.13289/j.issn.1009-6264.2014.01.015

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