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On the dynamics of twinning in magnesium micropillars

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    SYSNO ASEP0542590
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleOn the dynamics of twinning in magnesium micropillars
    Author(s) Máthis, K. (CZ)
    Knapek, Michal (UJF-V) ORCID
    Šiška, Filip (UFM-A) RID, ORCID
    Harcuba, P. (CZ)
    Ugi, D. (HU)
    Ispanovity, P. D. (HU)
    Groma, I. (HU)
    Shin, K. S. (KR)
    Number of authors8
    Article number109563
    Source TitleMaterials and Design - ISSN 0264-1275
    Roč. 203, MAY (2021)
    Number of pages10 s.
    Publication formPrint - P
    Languageeng - English
    CountryGB - United Kingdom
    Keywordsmagnesium ; compression ; twinning ; finite element modeling ; scanning electron microscopy
    Subject RIVBM - Solid Matter Physics ; Magnetism
    OECD categoryMaterials engineering
    Subject RIV - cooperationInstitute of Physics of Materials - Metallurgy
    R&D ProjectsGA18-07140S GA ČR - Czech Science Foundation (CSF)
    EF16_013/0001794 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    Method of publishingOpen access
    Institutional supportUFM-A - RVO:68081723 ; UJF-V - RVO:61389005
    UT WOS000640368300007
    EID SCOPUS85101168309
    DOI10.1016/j.matdes.2021.109563
    AnnotationMicro-deformation testing has recently gained far-reaching scientific importance as it provides intrinsic information on the dynamics of plastic deformation which is concealed when bulk materials are tested. In this work, single-crystal Mg micropillars favorably oriented for mechanical twinning were tested in compression with con-current scanning electron microscopy imaging. The experimental data were complemented by the finite element modeling in order to reveal the underlying physical background of the observed twinning dynamics. It was shown that the thickness of a twin should reach a critical value before triggering the nucleation of another twin to accommodate further strain. Nucleation and growth are repeated until the twins form throughout the whole micropillar, from top to bottom. Afterwards, the thickening and coalescence of all these twins take place until the entire micropillar volume is twinned. In addition, a line-by-line analysis of the scanning electron microscopy images was employed to reveal the twin lateral growth rates, which were shown to be on the order of 10(-5)-10(-4) m/s.
    WorkplaceNuclear Physics Institute
    ContactMarkéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
    Year of Publishing2022
    Electronic addresshttps://doi.org/10.1016/j.matdes.2021.109563
Number of the records: 1