Environmental transmission electron microscopy study of hydrogen charging effect on a Cu-Zr metallic glass
Environmental transmission electron microscopy study of hydrogen charging effect on a Cu-Zr metallic glass
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DOI：
10.1080/21663831.2020.1791273
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发表时间：
2020-07
影响因子：
8.3
通讯作者：
L. Tian;Yue-Qing Yang;T. Meyer;D. Tönnies;V. Roddatis;Hendrik Voigt;Xin’ai Zhao;Zhangjie Wang-Zhangjie-W
中科院分区：
文献类型：
--
作者：
L. Tian;Yue-Qing Yang;T. Meyer;D. Tönnies;V. Roddatis;Hendrik Voigt;Xin’ai Zhao;Zhangjie Wang-Zhangjie-W
氢致塑性在金属玻璃中已被发现，然而，其内在机制仍不清楚。在此，我们研究了Cu-Zr金属玻璃充电在氢气氛内的环境透射电子显微镜。与不带电的纳米柱相比，充氢纳米柱的压缩测试显示出更可控的变形。的可变分辨率波动电子显微镜研究的充氢样品揭示了增加的中程秩序的相关长度。我们的研究结果提供了实验证据氢诱导的异质性和支持的想法，增加异质性的程度导致多个局部剪切事件，抑制灾难性的剪切带。影响声明直接证据的空间相关长度增加的中程秩序被发现在充氢过程中的铜锆金属玻璃，并导致增强的塑性变形。图形摘要
Hydrogen induced plasticity has been found in metallic glasses; however, the underlying mechanism remains unclear. Herein, we studied a Cu-Zr metallic glass charged in a hydrogen atmosphere inside an environmental transmission electron microscope. Compression tests of hydrogen charged nanopillars show more controllable deformation compared to uncharged ones. A variable resolution fluctuation electron microscopy study of the hydrogen charged samples reveals an increase in the correlation length of the medium-range order. Our results provide experimental evidence for hydrogen-induced heterogeneity and support the idea that increasing the degree of heterogeneity leads to multiple local shear events and suppresses catastrophic shear banding. IMPACT STATEMENT Direct evidence of an increase in the spatial correlation length of the medium-range order is found during hydrogen charging of a Cu-Zr metallic glass and leads to enhanced plastic deformation. GRAPHICAL ABSTRACT