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Plastic deformation of bi-crystalline Zr-ZrH2
Journal of Nuclear Materials ( IF 2.8 ) Pub Date : 2020-03-14 , DOI: 10.1016/j.jnucmat.2020.152111
Hadi Ghaffarian , Dongchan Jang

By employing atomistic simulation, we investigated the deformation mechanism of the Zr-ZrH2 bi-crystal pillar containing coherent the Zr-ZrH2 interface under uniaxial compressive loading. The plastic deformation of the bi-crystalline sample first commences in the Zr part with tension twinning, followed by dislocation nucleation on the basal planes of the twinned area. Then plasticity transfers to ZrH2 with the assistance of lateral dislocation pile-up at the Zr side of the coherent Zr-ZrH2 interface, which promotes dislocation nucleation on <100>{001} slip system in ZrH2 side. The proposed deformation mechanism sheds light on the deformation behavior of inter-granular and trans-granular hydrides in the Zr matrix.



中文翻译:

Zr-ZrH 2双晶的塑性变形

通过采用原子模拟中,我们调查了Zr的ZRH的变形机构2包含相干的Zr的ZRH双晶支柱2在单轴压缩载荷接口。双晶样品的塑性变形首先在Zr部分开始于张力孪晶,然后在孪晶区域的基面上产生位错形核。然后可塑性转移到ZRH 2与横向错位堆积中的所述相干的Zr-ZRH的锆侧的援助2接口,其促进位错成核上<100> {001}滑移系统中ZRH 2侧。所提出的变形机理揭示了Zr基体中颗粒间和跨颗粒氢化物的变形行为。

更新日期:2020-03-16
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