Environmental transmission electron microscopy study of hydrogen charging effect on a Cu-Zr metallic glass
Tian, Lin ; Yang, Yue-Qing ; Meyer, Tobias ; Tönnies, Dominik ; Roddatis, Vladimir ; Voigt, Hendrik ; Zhao, Xin-Ai ; Wang, Zhang-Jie et al.
Citable Link (URL):http://resolver.sub.uni-goettingen.de/purl?gs-1/17506
Journal Article (Published version)
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.
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