|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | The role of melt cooling rate on the interface between 18R and Mg matrix in Mg_(97)Zn_(1)Y_(2) alloys显示文摘The role of melt cooling rate on the interface morphology and dislocation configuration between 18R long-period stacking ordered(LPSO)structure and Mg matrix in Mg_(97)Zn_(1)Y_(2)(at.%)alloys was investigated by atomic-scale HAADF-STEM imaging.The 18R/Mg interface is step-like both in the near-equilibrium alloy and non-equilibrium alloy.Lower cooling rate makes the step size more regular and larger.Only 54R structure can be observed at the interface in the near-equilibrium alloy,and the dislocations are highly ordered.54R and 54R′structure sandwiched by b1 and b2+b3 dislocation arrays,and new dislocation configuration can be detected at the interface in the non-equilibrium alloy,but the dislocations are less ordered.18R/Mg interface containing 54R or 54R′in equilibrium width,parallel to the(010)plane,should be most stable based on elastic calculation.The segregation of solute atoms and its strong interaction with dislocations dominate the LPSO/Mg interface via diffusion-displacive transformation. | Q.Q.Jin X.H.Shao J.M.Li Z.Z.Peng M.Lv B.Zhang Y.M.Li X.L.Ma | 2023 | Journal of Magnesium and Alloys2023，11，8： | 0 |
| 2 | Synergetic deformation mechanisms in an Mg-Zn-Y-Zr alloy with intragranular LPSO structures显示文摘Deformation kink is one of the important strengthening mechanisms of the long-period-stacking-ordered(LPSO)phase containing magnesium(Mg)alloys,while the deformation twin is generally suppressed.To optimize the mechanical properties of LPSO containing Mg alloy by simultaneously exciting kink and twin,we successfully prepared the Mg-Zn-Y-Zr alloy featuring intragranular LPSO phase and free grain boundary LPSO phase by homogenization.We unraveled the corresponding strengthening and toughening mechanisms through transmission electron microscopy characterization and theoretical analysis.The high strength and good plasticity of the homogenized alloy benefit from the synergistic deformation mechanism of multiple kinking and twining in the grains.And the activation of kinking and twinning depends on the thicknesses of LPSO lamellae and their relative spacing.These results may shed light on optimizing the design of Mg alloys regulating the microstructure of LPSO phases. | Z.Z.Peng X.H.Shao Z.M.Liang D.L.Wang L.W.Wang X.L.Ma | 2023 | Journal of Magnesium and Alloys2023，11，5： | 0 |
| 3 | Model Optimization of Litter Size and Genetic Analyses of Model Parameters in Sows显示文摘According to two properties of the life cycle and to fluctuation with parities,four mathematical models,the Poisson cycle model,the cubic polynomial model,the modified quadratic polynomial model-I and the modified quadratic polynomial model-II,were used to fit the records of litter size in Jiangquhai sows.From the viewpoint of statistics and biological significance,the modified quadratic polynomial model-I was found to be the optimum model.A single trait animal model and DFREML procedures were further used to estimate the heritability values of optimum model parameters.The results show that the heritability values for the coefficients A and B and the heritability value for the acme of the model pure quadric curve are larger than the heritability value for the litter size.This suggests that selection for model parameters may be more effective than direct selection for litter size. | M.J.Zhu J.T.Ding L.C.Li B.Fan M.Yu B.Liu Z.Z.Peng S.H.Zhao | 2010 | Journal of Animal Science and Biotechnology2010，1，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员