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- W2942651816 abstract "Abstract Although hydrogen embrittlement has been observed and extensively studied in a wide variety of metals and alloys, there still exist controversies over the underlying mechanisms and a fundamental understanding of hydrogen embrittlement in nanostructures is almost non-existent. Here we use metallic nanowires (NWs) as a platform to study hydrogen embrittlement in nanostructures where deformation and failure are dominated by dislocation nucleation. Based on quantitative in-situ transmission electron microscopy nanomechanical testing and molecular dynamics simulations, we report enhanced yield strength and a transition in failure mechanism from distributed plasticity to localized necking in penta-twinned Ag NWs due to the presence of surface-adsorbed hydrogen. In-situ stress relaxation experiments and simulations reveal that the observed embrittlement in metallic nanowires is governed by the hydrogen-induced suppression of dislocation nucleation at the free surface of NWs." @default.
- W2942651816 created "2019-05-09" @default.
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- W2942651816 date "2019-05-01" @default.
- W2942651816 modified "2023-10-18" @default.
- W2942651816 title "Hydrogen embrittlement in metallic nanowires" @default.
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- W2942651816 doi "https://doi.org/10.1038/s41467-019-10035-0" @default.
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