Uncovering of the formation of rare earth texture and pseudo fiber bimodal microstructure in the high ductility Mg-2Gd-0.4Zr alloy during extrusion

Tianxu Zheng ¹Yaobo Hu ²Chao Zhang ¹Tianshuo Zhao ³Bin Jiang ²Fusheng Pan ²Aitao Tang²

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作者信息

1. College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China
2. College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China;National Engineering Research Center for Magnesium Alloys,Chongqing,400044,China
3. College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China;School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China
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Abstract

The aim of this research was to elucidate the underlying mechanism involved in the formation of rare earth(RE)texture and pseudo fiber bimodal microstructure in the high ductility Mg-2Gd-0.4Zr alloy.The microstructure and texture evolution during the extrusion process were analyzed using various tech-niques,including optical microscopy(OM),scanning electron microscopy(SEM),electron backscatter diffraction(EBSD),and electron probe microanalysis(EPMA).The findings revealed that the RE texture in the extruded Mg-2Gd-0.4Zr alloy emerged during the dynamic recrystallization(DRX)process and was further strengthened during the subsequent static recrystallization and grain growth processes.The nu-cleation and growth of grains in the streamline region of Zr particles were delayed in comparison to other regions due to the pinning effect of Zr particles,ultimately resulting in the formation of pseudofiber bi-modal microstructure in the extruded Mg-2Gd-0.4Zr alloy.

Key words

Magnesium alloys/Ductility/Rare earth texture/Bimodal microstructure

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基金项目

National Science Foundation of China(52071037)

出版年

2024

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCD

影响因子：0.657

ISSN：1005-0302

参考文献量74

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