姜炳春,卢立伟,文泽军,李真真

• 1:广东科技学院机电工程学院
• 2:湖南科技大学机械设备健康维护重点实验室
• 3:湖南科技大学高温耐磨材料及制备技术湖南省国防科技重点实验室
• 4:中南大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-1500热模拟机获得了LZ92镁锂合金在变形温度为210～300℃、应变速率为0.001～1 s~(-1)条件下真应力-真应变曲线,利用多元回归方法构建基于应变的LZ92镁锂合金流变应力预测模型。结果表明:流变应力受应变速率和变形温度影响,流变应力随着变形温度的升高而下降,且随着应变率的增加而增大。此模型能够较好地描述LZ92镁锂合金的热变形行为特征。经实验对比验证,该模型预测流变应力的精度较高,平均相对误差为6.73%,相关系数为0.98。

关键词(KeyWords)： LZ92镁锂合金;热变形;本构模型;变形激活能

Abstract:

Keywords:

基金项目(Foundation): 广东省普通高校青年创新人才类项目(2019KQNCX228);; 湖南省自然科学基金优秀青年项目(2019JJ30010);; 广东科技学院重点项目(GKY-2016KYYB-4)

作者(Author): 姜炳春,卢立伟,文泽军,李真真

DOI: 10.13289/j.issn.1009-6264.2020-0047

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