张丁非,方霖,段红玲,戴庆伟

• 1:重庆大学国家镁合金材料工程技术研究中心
• 2:重庆大学材料科学与工程学院

摘要(Abstract)：

采用圆柱试样在Gleeble-1500材料热模拟试验机上对ZM61镁合金进行等温压缩变形试验,研究了该合金在变形温度为300～390℃、应变速率为0.001～0.1 s-1条件下的流变行为。结果表明:ZM61镁合金热压缩时流变应力随流变速率的降低和变形温度的升高而减小,其热压缩变形过程分为加工硬化、过渡、软化和稳态流变四个阶段;ZM61镁合金的热流变行为可用包含Arrhenius项的Zener-Hollomon参数来描述,其热变形本构方程为:ε=1.1915×1015[sinh(0.020756σ)]4.3159 exp(-201.86×103/RT),该本构关系的计算结果与实验结果之间的相对误差小于12.9%,可为制定ZM61镁合金的热加工工艺提供理论依据。

关键词(KeyWords)： ZM61镁合金;热压缩变形;流变应力;Zener-Hollomon参数;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家“973”重大基础研究项目(2007CB613700);; 国家“十一五”科技支撑计划重点项目(2007BAG06B04);; 国家杰出青年科学基金(No.50725413);; 中央高校基本科研业务费资助(No.CDJXS10132202);; 重庆市科技攻关项目(CSTC2009AB4008)

作者(Author): 张丁非,方霖,段红玲,戴庆伟

DOI: 10.13289/j.issn.1009-6264.2011.04.009

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