Understanding the correlations between Poisson's ratio and plasticity based on microscopic flow units in metallic glasses

Understanding the correlations between Poisson's ratio and plasticity based on microscopic flow units in metallic glasses
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基于金属玻璃中的微观流动单元理解泊松比与塑性之间的相关性

DOI:
10.1063/1.4869548
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发表时间:
2014-03
影响因子:
3.2
通讯作者:
Wang, W. H.
Wang, W. H.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhao, D. Q.;Ding, D. W.;Bai, H. Y.;Wang, W. H.

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在金属玻璃(MGs)中,塑性与泊松比之间存在明显的相关性。这两种不同的宏观力学性能之间的这种相关性很难从微观结构的角度来解释。研究了不同金属基复合材料的泊松比和塑性判据的微观结构来源,发现了流动单元相对浓度与泊松比之间的关系:流动单元浓度越高的金属基复合材料的泊松比越大,塑性越好。基于微观流动单元,我们解释了延性与泊松比之间的经验关联。
In metallic glasses (MGs), a clear correlation has been established between plasticity and the Poisson's ratio. Such a correlation between the two distinctive macroscopic mechanical properties is challenging to explain from a microstructure perspective. We studied the microstructural origin of the Poisson's ratio and plasticity criterion in various MGs and find a correlation between the relative concentration of flow units and Poisson's ratio: the MGs with higher concentration of flow units show a larger Poisson's ratio and better plasticity. We have explained the empirical correlation between ductility and the Poisson's ratio based on microscopic flow units in MGs.
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