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Elastic constants of non-modulated Ni-Mn-Ga martensite

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    0474677 - ÚT 2018 RIV GB eng J - Journal Article
    Sedlák, Petr - Seiner, Hanuš - Bodnárová, Lucie - Heczko, Oleg - Landa, Michal
    Elastic constants of non-modulated Ni-Mn-Ga martensite.
    Scripta Materialia. Roč. 136, July (2017), s. 20-23. ISSN 1359-6462. E-ISSN 1872-8456
    R&D Projects: GA ČR GA17-00062S
    Institutional support: RVO:61388998 ; RVO:68378271
    Keywords : acoustic methods * elastic behavior * ferromagnetic shape memory alloys * martensitic phase transformation
    OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
    Impact factor: 4.163, year: 2017
    https://www.sciencedirect.com/science/article/pii/S1359646217301768

    Room temperature elastic constants of non-modulated (NM) tetragonal martensite of a Mn-rich Ni-Mn-Ga alloy were determined by ultrasonic methods. The results are in good qualitative agreement with ab-initio predictions and confirm that NM martensite exhibits strong elastic anisotropy with shear instability related to the soft acoustic phonons mediating the reverse transition. The geometric arrangement of the softest shearing modes is shown to be identical as for the stress-induced fct martensite of the Fe-31.2 at.%Pd alloy.
    Permanent Link: http://hdl.handle.net/11104/0271878

     
     
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