Hot Deformation Behavior during the Hot Compression of AZ31 Alloy

被引：2

作者：

Sun, Shuli ^{[1
]}

Zhang, Mingang ^{[1
]}

He, Wenwu ^{[1
]}

Zhou, Junqi ^{[1
]}

Sun, Gang ^{[1
]}

机构：

[1] Taiyuan Univ Sci & Technol, Sch Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China

来源：

MANUFACTURING ENGINEERING AND AUTOMATION I, PTS 1-3 | 2011年 / 139-141卷

关键词：

AZ31 magnesium alloy; Activation energy; Dynamic recrystallization; Hot processing Map; FLOW-STRESS;

D O I：

10.4028/www.scientific.net/AMR.139-141.545

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The hot deformation behavior of as-cast AZ31 magnesium alloys have been investigated at 200 similar to 400 degrees C and strain rates 0.001 similar to 1s(-1) by means of hot compression tests on a Gleeble-1500D thermal-mechanical simulator. We have analyzed the flow stress-strain curve and presented the constitutive equation by calculating stress exponent, activation energy and Zemer-Hollomon parameter. Then, the processing map of AZ31 alloys has been developed based on the dynamic material model theories and Prasad instability criterion. The flow instability domain is observed at lower temperature and the larger power dissipation rate is emerging at 300 similar to 400 degrees C. We have analyzed the corresponding deformation microstructures and it is characteristic of dynamic recrystallization. These results have shown that AZ31 alloy has good workability at 300 similar to 400 degrees C and lower strain rate.

引用

页码：545 / 548

页数：4

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