张毅,曾祥云,田保红,刘平,刘勇,李瑞卿,许倩倩

• 1:河南科技大学材料科学与工程学院
• 2:上海理工大学材料科学与工程学院

摘要(Abstract)：

在Gleeble-1500D热模拟试验机上通过高温等温压缩试验,对Cu-0.4Cr-0.15Zr-0.05Ce合金在应变速率为0.01～5 s-1、变形温度为600～800℃的动态再结晶行为以及组织转变进行了研究。结果表明:流变应力随变形温度的升高而减小,随应变速率的提高而增大。同时从流变应力、应变速率和温度的相关性,得出了该合金高温热压缩变形时的热变形激活能Q为495.8 kJ/mol,同利用逐步回归的方法建立了该合金的流变应力方程。利用光学显微镜分析了形变温度对该合金在热压缩过程中的组织演变及动态再结晶形核机制的影响规律。

关键词(KeyWords)： Cu-0.4Cr-0.15Zr-0.05Ce合金;高温压缩;动态再结晶;流变应力方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51101052);; 国家高新技术研究发展计划(863计划)资助项目(2006AA03Z528);; 河南省高等学校青年骨干教师资助计划(2012GGJS-073);; 河南省教育厅自然科学研究计划(2011B430013);; 河南科技大学青年科学基金(2011QN48)

作者(Author): 张毅,曾祥云,田保红,刘平,刘勇,李瑞卿,许倩倩

DOI: 10.13289/j.issn.1009-6264.2013.08.010

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