刘勇,孙永伟,田保红,冯江,张毅

• 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

摘要(Abstract)：

利用Gleeble-1500热力模拟试验机,在温度为350～750℃、应变速率为0.01～5 s-1、总应变量0.7的条件下,对10%Mo/Cu-Al2 O3复合材料高温塑性变形过程中的动态再结晶行为及其热加工图进行研究和分析。试验结果表明:10%Mo/Cu-Al2 O3复合材料高温流动应力-应变曲线主要以动态再结晶软化机制为特征,峰值应力随变形温度的降低或应变速率的升高而增加;同时,利用动态材料模型(DMM)加工图分析了10%Mo/Cu-Al2O3复合材料变形机制和失稳机制,并最终确定了热加工工艺参数选取范围:变形温度600～750℃、应变速率0.01～0.1 s-1。

关键词(KeyWords)： 复合材料;热变形;流变应力;软化机制;加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50571035);; 河南科技大学博士科研启动基金项目(09001199)

作者(Author): 刘勇,孙永伟,田保红,冯江,张毅

DOI: 10.13289/j.issn.1009-6264.2011.s1.004

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