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| 1 | Dynamic Recrystallization and Texture Evolution of GW94 Mg Alloy During Multi-and Unidirectional Impact Forging显示文摘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.Shah M.G.Jiang D.Wu U.Wasi R.S.Chen | 2018 | Acta Metallurgica Sinica(English Letters)2018，31，9： | 7 |
| 2 | Microstructural evolution of Mg-7Al-2Sn Mg alloy during multi-directional impact forging显示文摘Multi-directional impact forging(MDIF)was applied to a Mg-7Al-2Sn(wt.%)Mg alloy to investigate its effect on the microstructural evolution.MDIF process exhibited high grain refinement efficiency.After MDIF 200 passes,the grain size drastically decreased to 20µm from the initial coarse grains of~500µm due to dynamic recrystallization(DRX).Meanwhile,original grain boundaries remained during MDIF and large numbers of fine sphericalβ-Mg_(17)Al_(12) particles dynamically precipitated along the original grain boundaries with high Al concentration,acting as effective pinning obstacles for the suppression of DRXed grain growth.Besides,micro-cracks nucleated during MDIF and propagated along the interface between the remained globular or cubic Al-Mn particles and Mg matrix. | M.G.Jiang H.Yan L.Gao R.S.Chen | 2015 | Journal of Magnesium and Alloys2015，3，3： | 5 |
| 3 | Quasi-in-situ observing the rare earth texture evolution in an extruded Mg-Zn-Gd alloy with bimodal microstructure显示文摘The static recrystallization and associated texture evolution were investigated in an extruded Mg-Zn-Gd alloy with bimodal microstructure based on a quasi-in-situ electron back-scatter diffraction(EBSD)method.The typical rare earth(RE)texture formed during annealing,evolving from the bimodal microstructure with[1010]basal fiber texture that consisted of fine recrystallized(RXed)grains and coarse unrecrystallized(un RXed)grains elongated along the extrusion direction.In both RXed and un RXed regions,the RXed nucleation produced randomized orientations without preferred selection and the RXed grains with RE texture orientation had more intensive growth ability than those with basal fiber orientation,thereby leading to the preferred selection of RE texture orientation during grain growth.The relationships between stored strain energy,solute drag,grain growth and texture evolution are discussed in detail.This study provided direct evidence of the RE texture evolution in an extruded Mg-RE alloy,which assists in understanding the formation mechanisms for RE texture during extrusion and better developing wrought Mg alloys with improved formability. | M.G.Jiang C.Xu H.Yan T.Nakata Z.W.Chen C.S.Lao R.S.Chen S.Kamado E.H.Han | 2021 | Journal of Magnesium and Alloys2021，9，5： | 4 |
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