孙国强,刘勇,田保红,张毅,宋克兴

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 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-1500D热模拟试验机对Cu-0.8Mg合金进行热变形试验,变形温度为500~850℃、应变速率为0.001~10 s-1,研究不同试验条件下合金流变应力的变化规律,分析合金的流变应力、应变速率和变形温度之间的关系,对合金的热加工图进行研究。结果表明:合金在热变形过程中,其流变应力曲线表现出典型的加工硬化、动态回复和再结晶特征,随着变形温度的升高和应变速率的降低,其流变应力和峰值应力也随之降低;合金热变形过程中的激活能为177.88 k J/mol,构建了合金的本构方程;合金在热变形过程中的最优加工参数为:变形温度为700~800℃、应变速率为0.01~0.1 s-1。

关键词(KeyWords)： Cu-0.8Mg合金;热变形;流变应力;动态再结晶;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1704143)

作者(Author): 孙国强,刘勇,田保红,张毅,宋克兴

DOI: 10.13289/j.issn.1009-6264.2018-0089

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