DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Subin | - |
dc.contributor.author | Vaid, Aviral | - |
dc.contributor.author | Im, Jiseong | - |
dc.contributor.author | Kim, Bongsoo | - |
dc.contributor.author | Prakash, Arun | - |
dc.contributor.author | Guenole, Julien | - |
dc.contributor.author | Kiener, Daniel | - |
dc.contributor.author | Bitzek, Erik | - |
dc.contributor.author | Oh, Sang Ho | - |
dc.date.accessioned | 2021-09-03T04:06:59Z | - |
dc.date.available | 2021-09-03T04:06:59Z | - |
dc.date.created | 2021-01-06 | - |
dc.date.issued | 2020-05 | - |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/106919 | - |
dc.description.abstract | The elastic-to-plastic transition during the deformation of a dislocation-free nanoscale volume is accompanied by displacement bursts associated with dislocation nucleation. The dislocations that nucleate during the so-called "pop-in" burst take the form of prismatic dislocation loops (PDLs) and exhibit characteristic burst-like emission and plastic recovery. Here, we report the in-situ transmission electron microscopy (TEM) observation of the initial plasticity ensued by burst-like emission of PDLs on nanoindentation of dislocation-free Au nanowires. The in-situ TEM nanoindentation showed that the nucleation and subsequent cross slip of shear loop(s) are the rate-limiting steps. As the indentation size increases, the cross slip of shear loop becomes favored, resulting in a transition from PDLs to open half-loops to helical dislocations. In the present case of nanoindentation of dislocation-free volumes, the PDLs glide out of the indentation stress field while spreading the plastic zone, as opposed to the underlying assumption of the Nix-Gao model. Prismatic dislocation loops (PDLs) form during the elastic-to-plastic transition of a dislocation-free volume under nanoindentation. Here the authors observe the initial plasticity and burst-like emission of PDLs in Au nanowires by in-situ transmission electron microscopy, elucidating fundamental aspects of the formation process. | - |
dc.language | English | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.relation.isPartOf | NATURE COMMUNICATIONS | - |
dc.title | In-situ observation of the initiation of plasticity by nucleation of prismatic dislocation loops | - |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41467-020-15775-y | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | NATURE COMMUNICATIONS, v.11, no.1 | - |
dc.identifier.wosid | 000537242500008 | - |
dc.citation.number | 1 | - |
dc.citation.title | NATURE COMMUNICATIONS | - |
dc.citation.volume | 11 | - |
dc.contributor.affiliatedAuthor | Oh, Sang Ho | - |
dc.identifier.scopusid | 2-s2.0-85084442713 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | Y | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | ATOMIC-FORCE MICROSCOPY | - |
dc.subject.keywordPlus | INCIPIENT PLASTICITY | - |
dc.subject.keywordPlus | MOLECULAR-DYNAMICS | - |
dc.subject.keywordPlus | CROSS-SLIP | - |
dc.subject.keywordPlus | NANOINDENTATION | - |
dc.subject.keywordPlus | SIZE | - |
dc.subject.keywordPlus | DEFORMATION | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | SIMULATIONS | - |
dc.subject.keywordPlus | ANNIHILATION | - |
dc.relation.journalWebOfScienceCategory | Multidisciplinary Sciences | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
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