王智祥,金熌,陈文江,吴朝圣,刘峰

• 1:江西理工大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-1500热模拟机对AZ91镁合金进行了高温压缩变形实验,分析了该合金在变形温度为250~400℃、应变速率为0.001~1 s-1条件下流变应力及组织演变规律。结果表明:合金的热变形过程均表现出明显的动态再结晶特征,其流变应力及组织均受变形温度和应变速率的因素影响显著;流变应力随变形温度的升高、应变速率的减小而降低,而再结晶晶粒尺寸则随之增大,且再结晶程度进行越为充分,其再结晶晶粒大小基本随Z参数自然对数值的增大而呈指数递减规律。

关键词(KeyWords)： 镁合金;热变形;动态再结晶;Zener-Hollomon参数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51161008)

作者(Author): 王智祥,金熌,陈文江,吴朝圣,刘峰

DOI: 10.13289/j.issn.1009-6264.2014.10.004

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