蔡志伟,陈拂晓,郭俊卿

• 1:河南科技大学材料科学与工程学院

摘要(Abstract)：

在变形温度300~450℃,应变速率0.005~1 s-1条件下,采用Gleeble-1500D热/力模拟试验机对AZ41M镁合金进行热压缩实验;结合微观组织,分析了变形温度、应变速率等对流变应力的影响;基于双曲正弦关系建立了流变应力本构方程,并对本构方程进行验证。结果表明,该镁合金为温度及应变速率敏感型材料,且其流变曲线具有明显的动态再结晶特征;压缩过程中AZ41M镁合金峰值应力随变形温度升高而减小,随应变速率升高而增大;实验条件下,由所建立的本构方程计算出的峰值应力与实验值基本吻合,绝对值最大平均相对误差仅为2.666%。

关键词(KeyWords)： AZ41M镁合金;热变形;流变应力;组织演变;本构方程

Abstract:

Keywords:

基金项目(Foundation): 河南省基础与前沿技术研究项目(112300413227)

作者(Author): 蔡志伟,陈拂晓,郭俊卿

DOI: 10.13289/j.issn.1009-6264.2015.11.012

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