The effect of yttrium on the generalized stacking fault energies in Mg
The effect of yttrium on the generalized stacking fault energies in Mg
复制标题
钇对镁中广义堆垛层错能的影响
DOI：
10.1016/j.commatsci.2017.02.030
复制
发表时间：
2017
影响因子：
3.3
通讯作者：
Rui Li
中科院分区：
文献类型：
--
作者：
Zongrui Pei;Rui Li
对于六方密排晶体固体中非基面的位错，相应的广义堆垛层错（GSF）不是唯一的，并且溶质引起的广义堆垛层错能（GSFE）的变化具有不同的趋势。我们以 Mg-Y 合金中的 {1 0 1´ 1}< 1 1 2´ 0> 滑移系统为例，计算了关于不同溶质位点和溶质浓度的所有可能的不同变化。这些结果用于评估钇的综合效应，这表明钇使得这种类型的位错在镁中更容易移动。我们的研究还表明，钇的最终影响主要是 GSFE 的降低。为了理解 GSFE 变化的根源，讨论了 GSFE 的机械贡献。
For dislocations in non-basal planes in hexagonal close-packed crystalline solids, the corresponding generalized stacking faults (GSFs) are not unique, and the resultant changes of generalized stacking fault energies (GSFEs) by solutes have different trends. We calculate all possible different changes with regards to different solute sites and solute concentrations in an example of {1 0 1¯ 1}< 1 1 2¯ 0> slip system in Mg-Y alloy. These results are employed to evaluate the comprehensive effect of yttrium, which shows yttrium enables dislocations of this type to be more mobile in Mg. Our study also demonstrates that the ultimate effect of yttrium is dominated by the decreased GSFEs. In order to understand the origin of the GSFE changes, the mechanical contributions to the GSFEs are discussed.
影响因子：
3.3
作者：
Pei, Z.;Zhu, L-F;Neugebauer, J.
通讯作者：
Neugebauer, J.