Mg-11.8Gd-2.8Y-0.44Zr耐热镁合金热压缩变形行为研究

董丽君; 吴安如; 王克龙; 贺佳; 蒋斌

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Mg-11.8Gd-2.8Y-0.44Zr耐热镁合金热压缩变形行为研究
Hot Compression Deformation Behavior of Mg-11.8Gd-2.8Y-0.44Zr Magnesium Alloy
2010年30卷第10期页码：955-957
纸质出版日期： 2010 ，
DOI：

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[1]董丽君,吴安如,王克龙,贺佳,蒋斌.Mg-11.8Gd-2.8Y-0.44Zr耐热镁合金热压缩变形行为研究[J].特种铸造及有色合金,2010,30(10):955-957+986.

Dong Lijun, Wu Anru, Wang Kelong, et al. Hot Compression Deformation Behavior of Mg-11.8Gd-2.8Y-0.44Zr Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(10):955-957.
[1]董丽君,吴安如,王克龙,贺佳,蒋斌.Mg-11.8Gd-2.8Y-0.44Zr耐热镁合金热压缩变形行为研究[J].特种铸造及有色合金,2010,30(10):955-957+986. DOI：

Dong Lijun, Wu Anru, Wang Kelong, et al. Hot Compression Deformation Behavior of Mg-11.8Gd-2.8Y-0.44Zr Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(10):955-957. DOI：

摘要

采用Gleeble-1500热/力模拟机

对Mg-11.8Gd-2.8Y-0.44Zr耐热镁合金在温度为573～723K

应变速率为0.001、0.010、0.100s-1

应变量为60%的塑性变形行为以及热压缩后镁合金组织的变化进行了研究。分析了流变应力与应变速率和温度的关系。结果表明

合金的稳态流变应力随应变速率的增大而增大

在恒应变速率条件下

合金的真应力水平随温度的升高而降低

根据试验分析

合金的热加工宜在623K时进行。

Abstract

The compression deformation of Mg-11.8Gd2.8Y-0.44Zr magnesium alloy and its microstructure were investigated on the Gleeble-1500Dhot simulator with strain rate of 0.001s-1～0.1s-1 at 300～450℃in condition of the 60%deformation rate.The relationship between flow stress and deformation temperature was analyzed.The results reveal that the steady flow stress is increased with the increase of strain rate

while the true stress is decreased with increasing in deformation temperature at a constant strain rate.Temperature about 350℃is suggested for hot deformation of the alloy.