Flow stress of die-cast AZ91D magnesium alloy under hot compression deformation

被引：0
|
作者：
You, Guoqiang [1 ,2 ]
Zuo, Xudong [1 ]
Tan, Xia [1 ]
Wang, Xiangjie [1 ]
Long, Siyuan [1 ,2 ]
机构：
[1] Chongqing University, Chongqing 400045, China
[2] National Engineering Research Center for Magnesium Alloys, Chongqing 400044, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2013年 / 42卷 / 09期
关键词：
Magnesium alloys - Dies - Strain rate - Compression testing - Hyperbolic functions - Constitutive equations - Plastic flow;
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摘要：
Hot compression tests of die-cast AZ91D magnesium alloy were performed on Gleeblle-1500D at strain rates ranging in 0.01~10 s-1 and deformation temperatures ranging in 250~450°C. The constitutive equation, Ε=1.41×1012 [sinh(0.014σ)]5.295exp (-159 449.509/RT), which is described by Zener-Hollomom parameters for hot compression deformation of die-cast AZ91D magnesium alloy was established. Compared to gravity cast AZ91D magnesium alloy, the deformation activation energy of die-cast AZ91D magnesium alloy, Q=159.45 kJ·mol-1, determined by hyperbolic sine function is lower. Copyright © 2013 Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.
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页码：1844 / 1848
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