蔡志伟,陈拂晓,郭俊卿,马凤杰

• 1:河南科技大学材料科学与工程学院
• 2:河南科技大学经济学院

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试验机对AZ41M镁合金进行热压缩实验;处理实验数据,求解不同变形条件下的动态回复软化率系数r,分析了温度和应变速率等工艺参数对r的影响;基于实验数据,建立了Laasraoui-Jonas(L-J)位错密度模型,借助Deform-3D软件对合金热压缩时的组织演变过程进行模拟,并将模拟结果与实验微观组织进行对比。结果表明,动态回复软化率系数r随温度升高而增大,随应变速率增加而降低;组织模拟结果与实验结果基本吻合,该位错密度模型能准确模拟合金动态再结晶过程中的微观组织演变。

关键词(KeyWords)： AZ41M镁合金;L-J位错密度模型;动态再结晶;组织演变模拟

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,马凤杰

DOI: 10.13289/j.issn.1009-6264.2016.04.036

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