Dislocation core structures of tungsten with dilute solute hydrogen

Dislocation core structures of tungsten with dilute solute hydrogen
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稀溶氢钨的位错核心结构

DOI:
10.1016/j.jnucmat.2017.09.019
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发表时间:
2017-12
影响因子:
3.1
通讯作者:
Liu W
Liu W
中科院分区:
工程技术2区
文献类型:
--
作者:
Wang Yinan;Xu Ben;Liu Wei;Li Qiulin;Li Chengliang;Shu Guogang;Xu B;Liu W

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本文采用量子力学和原子间相互作用势相结合的原子学计算方法,对特定氢原子浓度下钨中螺旋位错和刃位错的核心结构进行了预测。这些核心结构的构型是两种竞争能量的结果:部分位错之间的相互作用和两个部分位错之间对应的广义堆积错能,这在本工作中被提出。据此,我们可以准确地预测掺氢位错核结构的组态。
In this paper, a combination of quantum mechanical and interatomic potential-based atomistic calculations are used to predict the core structures of screw and edge dislocations in tungsten in the presence of a particular concentration of hydrogen atoms. These configurations of the core structures are the results of two competing energies: the interaction between the partial dislocations and the corresponding generalized stacking fault energy in between the two partial dislocations, which are presented in this work. With this, we can precisely predict the configurations of the hydrogen-doped dislocation core structures.
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