陈霞,刘全义,朱禹龙,赵阳,张丁非,潘复生

• 1:中国民用航空飞行学院民航安全工程学院
• 2:重庆大学材料科学与工程学院
• 3:重庆大学国家镁合金材料工程技术研究中心

摘要(Abstract)：

在变形温度为250～400℃、应变速率为0.001～1 s~(-1)的条件下，采用Gleeble-3800型热模拟实验机对Mg-6Zn-1Mn-2Sn-0.5Ca合金进行热压缩实验，研究了合金的热变形行为，构建了其本构方程，以及绘制了其热加工图。结果表明：Mg-6Zn-1Mn-2Sn-0.5Ca合金在等温压缩变形过程中的流变应力-应变曲线具有明显的动态再结晶曲线特征，流变应力首先随着变形量的增大而增加，到达峰值后逐渐下降到某一稳态值；合金的峰值应力与应变速率呈正相关，而与变形温度呈负相关；建立的热加工图表明随着应变的增加，合金的失稳区逐渐扩大；Mg-6Zn-1Mn-2Sn-0.5Ca合金的最佳加工区域为变形温度为350～400℃,应变速率为0.001～0.01 s~(-1)。

关键词(KeyWords)： Mg-6Zn-1Mn-2Sn-0.5Ca合金;热压缩;本构方程;热加工图

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金资助项目(J2022-090);; 四川省科技计划项目(2018GZYZF0069);; 国家重点研发计划项目(2016YFB0301101)

作者(Author): 陈霞,刘全义,朱禹龙,赵阳,张丁非,潘复生

DOI: 10.13289/j.issn.1009-6264.2024-0396

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