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

0474677 - ÚT 2018 RIV GB eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GA17-00062S
Institucionální podpora: RVO:61388998 ; RVO:68378271
Klíčová slova: acoustic methods * elastic behavior * ferromagnetic shape memory alloys * martensitic phase transformation
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.); Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impakt faktor: 4.163, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0271878