材料科学技术(英文版)2024，Vol.188Issue(21) ：169-182.DOI:10.1016/j.jmst.2023.11.044

Effect of initial grain size on the recrystallization behavior and recrystallization texture of a Mg-3Gd alloy

Fang Han Xuan Luo Knut Marthinsen Guilin Wu Ziyong Hou Xiaoxu Huang
材料科学技术(英文版)2024，Vol.188Issue(21) ：169-182.DOI:10.1016/j.jmst.2023.11.044
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Effect of initial grain size on the recrystallization behavior and recrystallization texture of a Mg-3Gd alloy

Fang Han 1Xuan Luo 2Knut Marthinsen 3Guilin Wu 4Ziyong Hou 1Xiaoxu Huang5
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作者信息

  • 1. International Joint Laboratory for Light Alloys(MOE),College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China
  • 2. International Joint Laboratory for Light Alloys(MOE),College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Key Laboratory for Light-weight Materials,Nanjing Tech University,Nanjing 210009,China
  • 3. Department of Materials Science and Engineering,Norwegian University of Science and Technology,Trondheim 7491,Norway
  • 4. Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • 5. International Joint Laboratory for Light Alloys(MOE),College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Shenyang National Laboratory for Materials Science,Chongqing University,Chongqing 400044,China
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Abstract

The effect of initial grain size on the recrystallization and recrystallization texture of a rolled Mg-3Gd(wt.％)alloy is studied in detail.The results show that the deformation microstructure of an initially coarse-grained(CG)sample has a larger twinned area and a higher density of twin boundaries than a fine-grained(FG)sample.After annealing,the CG sample recrystallizes preferentially in the twinned area,whereas the FG sample adopts the higher density grain boundaries as the nucleation sites.Fur-thermore,weak recrystallization texture components appear from the grain nucleation stage,regardless of the initial grain size,and are preserved after complete recrystallization due to uniform grain growth.The majority of recrystallization texture is deviated 20°-45° away from normal direction(ND),accounting for more than 50％.Especially,the recrystallization texture of the FG sample is a"Rare Earth texture",in contrast to the widely reported texture modification unrelated to grain boundary nucleation.Only a scattered basal texture is observed in the CG sample,which also differs from the reported"Rare Earth texture"originating from shear band nucleation in dilute Mg-Gd alloys.Finally,based on the Johnson-Mehl-Avrami-Kolmogorov(JMAK)model,the recrystallization kinetics are calculated,and it is found that the initial grain size mainly affects the nucleation rate,and has limited effect on the grain growth rate.

Key words

Mg-3Gd/Grain size/Microstructure evolution/Recrystallization texture/Recrystallization kinetics

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基金项目

National Key Research and Development Program of China(2021YFB3702101)

National Natural Science Foundation of China(52130107)

National Natural Science Foundation of China(52071038)

Fundamental Research Funds for the Central Universities(2023CDJXY-018)

the"111"Project(B16007)

Ministry of Education and the State Administration of Foreign Experts Affairs of China,Graduate Student Research Innovation (CYB21007)

Research Council of Norway(309724)

Center for Research based Innovation SFI PhysMet(309584)

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)

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影响因子：0.657
ISSN：1005-0302
参考文献量62
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