周孟,饶劢攀,刘勇,田保红,张毅,杨鹏飞

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:河南省有色金属材料科学与加工技术重点试验室

摘要(Abstract)：

利用Gleeble-1500数控动态力学模拟试验机对Cu-Ni-Si-Co-Zr合金进行了热压缩试验，研究了合金在应变速率为0.01～10 s~(-1),变形温度为600～900℃,总压缩应变量为50%条件下的热变形行为，并研究了Zr含量对Cu-Ni-Si-Co-Zr合金热变形行为的影响。建立了Cu-1.52Ni-0.65Si-1.02Co-0.036Zr、Cu-1.55Ni-0.50Si-1.30Co-0.084Zr和Cu-1.56Ni-0.62Si-1.06Co-0.19Zr三种合金的本构方程。结果表明：合金的峰值应力随应变速率的增加和变形温度的降低而升高，并且Zr含量的增加能够提高合金的流变应力；基于Arrhenius双曲正弦本构关系得到了合金的峰值流变应力本构方程，计算结果表明Zr含量的增加能够提高合金的热激活能；对合金的微观组织进行观察与分析表明Zr含量的增加延缓了Cu-Ni-Si-Co-Zr合金的动态再结晶过程，使其在更高温度下发生。

关键词(KeyWords)： Cu-Ni-Si-Co-Zr合金;热变形;流变应力;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071134);; 河南省优秀人才创新基金(ZYQR201912164);; 河南省高校科技创新团队项目(22IRTSTHN001);; 河南省科学院科研开发专项(220910009)

作者(Author): 周孟,饶劢攀,刘勇,田保红,张毅,杨鹏飞

DOI: 10.13289/j.issn.1009-6264.2022-0104

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