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

共 27 条

[1]

Wu G H, Wang C L, Sun M, Ding W J., Recent developments and applications on high-performance cast magnesium rare-earth alloys[J], J. Magnesium Alloys, 9, 1, (2020)

[2]

You S H, Huang Y D，, Kainer K U，, Hort N., Recent research and developments on wrought magnesium alloys[J], J. Magnesium Alloys, 5, 3, (2017)

[3]

Liu D X, Yang D L, Li X L, Hu S W., Mechanical properties，corrosion resistance and biocompatibilities of degradable Mg-RE alloys：A review[J], J. Mater. Res. Technol, 8, 1, (2018)

[4]

Wu G H，, Tong X, Jiang R, Ding W J., Grain refinement of as-cast Mg-RE alloys：research progress and future prospect[J], Acta Metall. Sin, 58, 4, (2022)

[5]

Mei W W, Li Q A, Chen X Y, Chen P J, Tan J F, Li X Y., Research status of plasticity improvement of Mg-Gd alloys[J], Journal of the Chinese Society of Rare Earths, 41, 4, (2023)

[6]

Qiu D, Zhang M X, Taylor J A, Kelly P M., A new approach to designing a grain refiner for Mg casting alloys and its use in Mg-Y-based alloys[J], Acta Mater, 57, 10, (2009)

[7]

Chen H M，, Han D，, Cui H W，, Zhang L，, Wang L，, Zhang J, Jin Y X., Microstructures and properties of As-cast rare earth magnesium alloy with LPSO phase[J], Mater. Res. Express, 6, (2019)

[8]

Griffiths D., Explaining texture weakening and improved formability in magnesium rare earth alloys[J], Mater. Sci. Technol, 31, 1, (2015)

[9]

Luo X D, Zhang D Z，, Chen X Y，, Xu C，, Wang H, Wei L C., Research progress on improving microstructure properties of magnesium alloys with rare earth elements[J], Journal of the Chinese Society of Rare Earths, 41, 2, (2023)

[10]

Bugnet M，, Kula A, Niewczas M，, Botton G A., Segregation and clustering of solutes at grain boundaries in Mg-rare earth solid solutions[J], Acta Mater, 79, (2014)

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