朱云鹏,解品,金培鹏

• 1:青海大学青海省新型轻合金重点实验室青海省轻金属合金及深加工工程技术研究中心

摘要(Abstract)：

采用Gleeble-3500热模拟试验机研究Mg-5Sn-2.5Pb镁合金在变形温度250~450℃、应变速率为0.001~10 s~(-1)条件下的热压缩变形行为,并基于动态材料模型(DMM)建立了Mg-5Sn-2.5Pb镁合金在应变为0.6时的热加工图。结果表明,Mg-5Sn-2.5Pb镁合金的高温流变应力对应变速率和温度的变化敏感,随变形温度的降低和应变速率的增大而增大;Mg-5Sn-2.5Pb镁合金的最佳加工区域:变形温度为375~450℃、应变速率为0.01~0.3 s~(-1)。在此区域Mg-5Sn-2.5Pb镁合金的显微组织为动态再结晶组织。

关键词(KeyWords)： Mg-5Sn-2.5Pb镁合金;热压缩;本构方程;热加工图;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51661028);; 青海省科技项目(2014-GX-203)

作者(Author): 朱云鹏,解品,金培鹏

DOI: 10.13289/j.issn.1009-6264.2016-0044

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