{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Yin S"],"funding":["NSF | Directorate for Mathematical & Physical Sciences | Division of Materials Research","NSF | Directorate for Mathematical & Physical Sciences | Division of Materials Research (DMR)"],"pagination":["2004"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC6494841"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["10(1)"],"pubmed_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."],"journal":["Nature communications"],"pubmed_title":["Hydrogen embrittlement in metallic nanowires."],"pmcid":["PMC6494841"],"funding_grant_id":["1709318"],"pubmed_authors":["Chang TH","Zhu Y","Yin S","Richter G","Gao H","Cheng G"],"additional_accession":[]},"is_claimable":false,"name":"Hydrogen embrittlement in metallic nanowires.","description":"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.","dates":{"release":"2019-01-01T00:00:00Z","publication":"2019 May","modification":"2026-05-07T03:45:22.916Z","creation":"2019-06-06T23:10:22Z"},"accession":"S-EPMC6494841","cross_references":{"pubmed":["31043601"],"doi":["10.1038/s41467-019-10035-0"]}}