| Orientations of nuclei during static recrystallization in a cold-rolled Mg-Zn-Gd alloy |
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| 作者姓名： | L.Y.Zhao H.Yan R.S.Chen En-Hou Han |
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| 作者单位： | The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences,62 Wencui Road,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,72 Wenhua Road,Shenyang 110016,China;The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences,62 Wencui Road,Shenyang 110016,China;The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences,62 Wencui Road,Shenyang 110016,China;The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences,62 Wencui Road,Shenyang 110016,China |
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| 基金项目： | National Basic Research Program of China ;State Key Program of National Natural Science of China ;National Key Research and Development Program of China ;The authors gratefully acknowledge the financial supports from the National Natural Science Foundation of China |
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| 摘 要： | The static recrystallization process of a cold-rolled Mg-Zn-Gd alloy was tracked by a quasi-in-situ electron backscatter diffraction method to investigate the orientations of nuclei.The results show that orientation distribution of nuclei is associated with nucleation mechanism.The continuous static recrystallization nuclei display similar orientations to the parent grains with TD orientation.Differently,discontinuous static recrystallization nuclei formed within the parent grains(TD-45~0 orientation) show random orientations and a variety of misorientation angles but preferred axes <5273> or <5270>.Interestingly,a special oriented nucleation is found.Discontinuous static recrystallization nuclei originated from boundaries of the parent grain(TD-70° orientation) show concentrated TD orientations in another side due to the preferred misorientation relationship 70°<1120>(∑18 b).It is speculated that these two special misorientation relationships are related to the dislocation type.
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| 关 键 词： | Mg alloys ORIENTATION NUCLEATION Quasi-in-situ EBSD Static recrystallization |
Orientations of nuclei during static recrystallization in a cold-rolled Mg-Zn-Gd alloy |
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| L.Y.Zhao,H.Yan,R.S.Chen,En-Hou Han.Orientations of nuclei during static recrystallization in a cold-rolled Mg-Zn-Gd alloy[J].Journal of Materials Science & Technology,2021,60(1):162-167. |
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| Authors: | LYZhao HYan RSChen En-Hou Han |
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| Abstract: | The static recrystallization process of a cold-rolled Mg-Zn-Gd alloy was tracked by a quasi-in-situ electron backscatter diffraction method to investigate the orientations of nuclei. The results show that orientation distribution of nuclei is associated with nucleation mechanism. The continuous static recrystallization nuclei display similar orientations to the parent grains with TD orientation. Differently, discontinuous static recrystallization nuclei formed within the parent grains (TD-45° orientation) show random ori-entations and a variety of misorientation angles but preferred axes<5ˉ273>or<5ˉ270>. Interestingly, a special oriented nucleation is found. Discontinuous static recrystallization nuclei originated from bound-aries of the parent grain (TD-70° orientation) show concentrated TD orientations in another side due to the preferred misorientation relationship 70° <11(2)0> (Σ18b). It is speculated that these two special misorientation relationships are related to the dislocation type. |
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| Keywords: | Mg alloys Orientation Nucleation Quasi-in-situ EBSD Static recrystallization |
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