The size-dependent non-localized deformation in a metallic alloy

The size-dependent non-localized deformation in a metallic alloy
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金属合金中与尺寸相关的非局部变形

DOI:
10.1016/j.scriptamat.2015.01.015
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发表时间:
2015-05
期刊:
影响因子:
6
通讯作者:
Jiang J. Z.
Jiang J. Z.
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhong C.;Zhang H.;Cao Q. P.;Wang X. D.;Zhang D. X.;Jiang J. Z.

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采用分子动力学模拟方法,系统研究了具有相同冷却历史的Cu50Zr50金属玻璃(MG)薄膜的拉伸行为与薄膜厚度的关系。结果表明,随着膜厚的减小,Cu_(50)Zr_(50)MG薄膜的形变确实发生了从局部形变到非局部形变的转变,这可能是所有MG的普遍现象。这里观察到的厚度相关的变形模式的变化,然后合理地解释了格里菲斯裂纹扩展准则。
The tensile behaviors of Cu50Zr50metallic glass (MG) films with the same cooling history as a function of film thickness are systematically studied by molecular dynamics simulations. It clearly reveals that with decreasing film thickness, a transition from the localized deformation to the non-localized deformation indeed occurs in Cu50Zr50MG films, which might be a general phenomenon for all MGs. The thickness-dependent deformation mode change observed here, is then reasonably explained by the Griffith crack-propagation criterion.
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