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| 1 | Ductility enhancement of EW75 alloy by multi-directional forging显示文摘In this study,the Mg-7Gd-5Y-1Nd-0.5Zr alloy can reach a high ductility by the process of multi-directional forging,and the evolution of the microstructure,texture and the mechanical properties were discussed systematically.The results show that after the solutionized sample was multi-forged at 500℃,its grain size can be refined from 292 um to 58 um.As the forging temperature decreased,fine particles precipitated in the matrix.The volume fraction of the particles increased with the forging temperature decreasing,so the nucleation and growth of crystallization were strongly restricted.There was no recrystallization as the forging temperature fell to 410℃,and the severe deformed grains distributed as streamlines perpendicular to the final compression axis.The texture intensity decreased with increasing forging passes.The sample with best ductility was obtained after compressed at 470℃,with an elongation to failure of 21%at room temperature,which is increased by 200%,in comparison with that of the samples in solutionized condition.EBSD results revealed that the mean grain size was 15 um.Refined grains as well as the weakened texture were the key factors to its high ductility. | M.Hong D.Wu R.S.Chen X.H.Du | 2014 | Journal of Magnesium and Alloys2014，2，4： | 4 |
| 2 | Measurement of axial stress using mode-converted ultrasound显示文摘 | N.Kim M.Hong | | 0，，03： | 1 |
| 3 | High cycle fatigue behavior of the forged Mg-7Gd-5Y-1Nd-0.5Zr alloy显示文摘This paper investigated the high cycle fatigue behavior of a forged Mg-7Gd-5Y-1Nd-0.5Zr alloy with different stress concentration factor(Kt),under different stress ratio(R),and along different loading direction.The smooth specimen(Kt=1),under R=0.1 and along longitude direction,shows a high fatigue strength of 162 MPa at 107 cycles.The fatigue behavior of the forged Mg-7Gd-5Y-1Nd-0.5Zr alloy exhibits a high sensitive to the notch.Moreover,change of stress ratio from 0.1 to−1 may also result in a bad fatigue property.The flux inclusions were elongated along longitude direction and/or transverse direction during the forging process of the Mg-7Gd-5Y-1Nd-0.5Zr alloy.The interface between the flux inclusion and the matrix may debond and serve as the crack initiation site during the fatigue loading process,leading to the deterioration of the fatigue property along thickness direction and a high anisotropic fatigue behavior between longitude direction and thickness direction. | D.Wu S.Q.Li M.Hong R.S.Chen E.H.Han W.Ke | 2014 | Journal of Magnesium and Alloys2014，2，4： | 0 |
| 4 | Screebubg if actuve cinibebts in Angelica sinensis by using biomembrane affinity extraction coupled with high performance liquid chromatography显示文摘 | Z.B.Dong S.P.LI M.Hong Q.Zhu | 2004 | 中国药理通讯2004，21，3： | 0 |
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