Mg-13Gd-4Y-2Zn-0.5Zr合金的高温热压缩变形

尹雪雁; 于建民; 张治民; 齐红娜; 郁湘; 陈艳

doi:10.15980/j.tzzz.2016.10.030

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Mg-13Gd-4Y-2Zn-0.5Zr合金的高温热压缩变形
Hot Compression Deformation Behavior of Mg-13Gd-4Y-2Zn-0.5Zr Magnesium Alloy
2016年36卷第10期页码：1117-1120
纸质出版日期： 2016 ，
DOI： 10.15980/j.tzzz.2016.10.030

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[1]尹雪雁,于建民,张治民,齐红娜,郁湘,陈艳.Mg-13Gd-4Y-2Zn-0.5Zr合金的高温热压缩变形[J].特种铸造及有色合金,2016,36(10):1117-1120.

YinXueyan, Yu Jianmin, Zhang Zhimin, et al. Hot Compression Deformation Behavior of Mg-13Gd-4Y-2Zn-0.5Zr Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2016,36(10):1117-1120.
[1]尹雪雁,于建民,张治民,齐红娜,郁湘,陈艳.Mg-13Gd-4Y-2Zn-0.5Zr合金的高温热压缩变形[J].特种铸造及有色合金,2016,36(10):1117-1120. DOI： 10.15980/j.tzzz.2016.10.030.

YinXueyan, Yu Jianmin, Zhang Zhimin, et al. Hot Compression Deformation Behavior of Mg-13Gd-4Y-2Zn-0.5Zr Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2016,36(10):1117-1120. DOI： 10.15980/j.tzzz.2016.10.030.

摘要

采用Gleeble-3500热模拟机对Mg-13Gd-4Y-2Zn-0.5Zr合金进行高温热压缩变形

研究分析了材料的微观组织和流变应力-应变关系曲线并进行线性拟合

建立相应的热变形本构关系

并分析其变形规律。结果表明

变形组织很大程度上继承了铸态均匀化组织的形貌;温度越高

越早达到峰值应力

流变应力值与峰值应力值之间的差值也越小;且稳态应力值随之越小。本构方程为ε·=5.314 5×10

[sinh（0.009 717σ）]

5.401 38

exp[-253.927/（RT）]。

Abstract

Hot compression deformation test of Mg-13Gd-4Y-2Zn-0.5Zr alloy was conducted using a Gleeble-3500 stimulator.Based on the analysis of the microstructure and the linear fitting for curves of stress-strain

the corresponding thermal deformation constitutive relationship was established to analyze microstructure evolution.The results show that the deformation microstructure stays the as-cast homogenized microstructure morphology.With the increase of deformation temperature

time of reaching peak stress is decreased

so the difference between flow stress value and peak stress value is narrowed

and the steady state stress value is also decreased.The deformation constitutive relationship is:ε·=5.314 5×10

[sinh（0.009 717σ）]

5.401 38

exp（-253.927/RT）.