Effect of Deformation and Ageing Treatment on Microstructure and Properties of AZ80 Magnesium Alloy

Li Weidong1; Zhou Haitao1; Chen Hexing2; Zheng Kaihong2; Qi Wenjun2

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Effect of Deformation and Ageing Treatment on Microstructure and Properties of AZ80 Magnesium Alloy
Vol. 31, Issue 12, Pages: 1170-1174(2011)
Published： 2011 ，
DOI：

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[1]李伟东,周海涛,陈和兴,郑开宏,戚文军.变形、时效对AZ80镁合金组织性能的影响[J].特种铸造及有色合金,2011,31(12):1170-1174.

Li Weidong1, Zhou Haitao1, Chen Hexing2, et al. Effect of Deformation and Ageing Treatment on Microstructure and Properties of AZ80 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(12):1170-1174(2011)
[1]李伟东,周海涛,陈和兴,郑开宏,戚文军.变形、时效对AZ80镁合金组织性能的影响[J].特种铸造及有色合金,2011,31(12):1170-1174. DOI：

Li Weidong1, Zhou Haitao1, Chen Hexing2, et al. Effect of Deformation and Ageing Treatment on Microstructure and Properties of AZ80 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(12):1170-1174(2011) DOI：

摘要

研究了变形、时效对AZ80镁合金组织性能的影响。铸态AZ80镁合金经470℃×8h固溶处理

然后在400℃条件下进行不同变形量的热轧变形

变形后的部分镁合金进行170℃×16h时效处理。结果表明

随着变形量的增加晶粒得到细化

当变形量达到80%时

晶粒尺寸由铸态的105μm细化到3μm

此时抗拉强度达到282.49MPa;合金的伸长率先增加后减小

变形量为50%时伸长率达到最大

为24.21%;屈服强度先降低后增加。

Abstract

The effect of deformation and ageing treatment on microstructure and properties of AZ80 magnesium alloy were investigated.Firstly

AZ80 magnesium alloy is treated with solid solution treatment at 470 ℃ for 8 h.And then

it is hot-rolled with varied deformation rate at 400℃.Finally

the hot rolled magnesium alloy is treated with ageing treatment at 170 ℃ for 16 h.The results show that the grain size can be refined with the increase of deformation rate.With deformation rate of 80%

the average grain size is refined from 105 μm to 3 μm

and tensile strength reaches 282.49 MPa.Meanwhile

the elongation exhibits first increased and then reduced

where it can reach 24.21% with deformation rate of 50%.In addition

the yield strength is first reduced and then increased.