Hot Compression Deformation Behavior and Processing Map of Mg-12Gd（-4Y）-0.5Zr Alloy

被引：0

作者：

Zhao, Zhenliang ^{[1
]}

Li, Quanan ^{[1
,2
,3
]}

Chen, Xiaoya ^{[1
,2
]}

Mei, Wanwan ^{[1
]}

Tan, Jinfeng ^{[4
]}

机构：

[1] School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang

[2] Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal new Materials and Advanced Processing Technology, Luoyang

[3] Longmen laboratory, Luoyang

[4] CHINALCO Luoyang Copper Co.，LTD., Luoyang

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2025年 / 43卷 / 01期

关键词：

activation energy; hot processing map; Mg-12Gd(-4Y)-0.5Zr alloy; thermal compression;

D O I：

10.11785/S1000-4343.20250115

中图分类号：

学科分类号：

摘要：

The hot compression experiments of Mg-12Gd-0.5Zr （GW120K）alloy and Mg-12Gd-4Y-0.5Zr （GW124K）alloy at 350‒500 ℃ and strain rate of 0.002‒1 s−1 were studied. The flow stress and microstructure were analyzed，the activation energy of hot deformation was calculated，and the hot processing map was constructed and analyzed. The results show that the true stress-true strain curves of the two alloys show the general characteristics of dynamic recrystallization. After adding Y，the flow stress increases. When deformed at low temperature and high strain rate （350 ℃，0.002 s−1），the alloy is prone to 45°angle shear fracture. When deformed at 400 ℃，the dynamic precipitate nucleates at the grain boundary of dynamic recrystallization. After adding Y，the number of dynamic precipitates in GW124K alloy increases obviously. When deformed at 500 ℃，complete dynamic recrystallization occurs，and the recrystallized grain size of GW124K alloy（25 μm）is significantly smaller than that of GW120K alloy（40 μm）. The hot deformation activation energy of GW120K alloy is 218.788 kJ·mol−1. After adding Y，the hot deformation activation energy increases to 243.530 kJ·mol−1. The instability region of Mg-12Gd（- 4Y）-0.5Zr alloy is concentrated in the low temperature and high strain region. After adding Y，the instability region increases，while the machinable region decreases. © 2025 Editorial Office of Chinese Rare Earths. All rights reserved.

引用

页码：162 / 172

页数：10

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