喷射沉积挤压态镁合金的热压缩变形行为

贾国栋

doi:10.15980/j.tzzz.2017.07.002

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喷射沉积挤压态镁合金的热压缩变形行为
Deformation Behavior of As-extruded Spray-deposited Magnesium Alloys during Hot Deformation
2017年37卷第7期页码：701-703
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.07.002

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[1]贾国栋.喷射沉积挤压态镁合金的热压缩变形行为[J].特种铸造及有色合金,2017,37(07):701-703.

Jia Guodong. Deformation Behavior of As-extruded Spray-deposited Magnesium Alloys during Hot Deformation[J]. Special Casting & Nonferrous Alloys, 2017,37(7):701-703.
[1]贾国栋.喷射沉积挤压态镁合金的热压缩变形行为[J].特种铸造及有色合金,2017,37(07):701-703. DOI： 10.15980/j.tzzz.2017.07.002.

Jia Guodong. Deformation Behavior of As-extruded Spray-deposited Magnesium Alloys during Hot Deformation[J]. Special Casting & Nonferrous Alloys, 2017,37(7):701-703. DOI： 10.15980/j.tzzz.2017.07.002.

摘要

以喷射沉积技术制备Mg-9Al-3Zn-1Mn-6Ca-1Nd合金的沉积坯

对其进行挤压变形和热压缩变形

重点研究了挤压态镁合金的热压缩变形行为和组织演变。结果表明

挤压态镁合金为α-Mg和微米级"含Nd的Al2Ca相"的双相组织;当应变速率一定时

流变应力随温度的升高而降低

当变形温度一定时

流变应力随应变速率的增大而增大。当温度和应变速率一定时

Mg基体的轴比（c/a）随变形程度的增加而降低

"拉压不对称性"得到改善。

Abstract

The billets of Mg-9Al-3Zn-1Mn-6Ca-1Nd alloy were produced by a spraying deposition method（the Osprey process）.The microstructure and deformation behavior of the alloy prepared were investigated by OM

SEM

XRD during hot extrusion.The results show that as-extruded magnesium alloys is composed ofα-Mg and the second phase " Al

Ca phase containing Nd".And the flow stress is decreased with increasing in temperature at a given strain rate

while it is increased with increasing in strain rate at agiven temperature.The axial ratio（c/a）of the Mg matrix is decreased with the increase of the deformation rate at a given stain rate and temperature

so the degree of "tension and compression asymmetry" is decreased.