Dynamic Recrystallization and Texture Evolution of GW94 Mg Alloy During Multi-and Unidirectional Impact Forging
来源期刊：Acta Metallurgica Sinica2018年第9期
论文作者：S.S.A.Shah M.G.Jiang D.Wu U.Wasi R.S.Chen
文章页码：923 - 932
摘 要：Multi-and unidirectional impact forgings were successfully applied to a（GW94） Mg–RE alloy.The microstructure and texture evolution were investigated systematically.The obtained results indicated that during unidirectional impact forging,a bimodal chain deform microstructure was sustained till last forging pass,whereas {10–12} extension twins-assisted continuous dynamic recrystallization took place during the multidirectional impact forging（MDIF）.The coalescence and intersection of {10–12} extension twins during MDIF efficiently refined the original coarse grains and led to an almost recrystallized homogeneous microstructure.The texture analysis demonstrated that unidirectional impact forging yielded out the strong basal texture; however,MDIF resulted in non-basal texture,which was attributed to the cooperative effects of continuous DRX,twinning,and MDIF itself during the deformation process.
S.S.A.Shah1,2，M.G.Jiang1，D.Wu1，U.Wasi1,3，R.S.Chen1
1. The Group of Magnesium Alloys and Their Applications,Institute of Metal Research,Chinese Academy of Sciences2. University of Chinese Academy of Sciences3. School of Materials Science and Engineering,University of Science and Technology of China
摘 要：Multi-and unidirectional impact forgings were successfully applied to a（GW94） Mg–RE alloy.The microstructure and texture evolution were investigated systematically.The obtained results indicated that during unidirectional impact forging,a bimodal chain deform microstructure was sustained till last forging pass,whereas {10–12} extension twins-assisted continuous dynamic recrystallization took place during the multidirectional impact forging（MDIF）.The coalescence and intersection of {10–12} extension twins during MDIF efficiently refined the original coarse grains and led to an almost recrystallized homogeneous microstructure.The texture analysis demonstrated that unidirectional impact forging yielded out the strong basal texture; however,MDIF resulted in non-basal texture,which was attributed to the cooperative effects of continuous DRX,twinning,and MDIF itself during the deformation process.
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