杨志强,刘勇,田保红,张毅

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属共性技术协同创新中心
• 3: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,获得了20 vol%TiC颗粒增强弥散铜基复合材料在温度为450～850℃、应变速率为0.001～1 s-1的真应力-应变数据。采用加工硬化率处理方法,研究了该复合材料的动态再结晶行为。结果表明,该材料的真应力-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;该材料的lnθ-ε曲线出现拐点,-(lnθ)/ε-ε曲线均出现极小值;峰值应变和临界应变均随变形温度的升高与应变速率的降低而减小;临界应变与峰值应变之间具有相关性,即εc/εp=0.5276。

关键词(KeyWords)： TiC颗粒;弥散铜;动态再结晶;临界条件

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助(项目号51101052)

作者(Author): 杨志强,刘勇,田保红,张毅

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