Highly mobile twin boundaries in seven-layer modulated Ni-Mn-Ga-Fe martensite

0524858 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Sozinov, A. - Musiienko, D. - Saren, A. - Veřtát, Petr - Straka, Ladislav - Heczko, Oleg - Zelený, M. - Chulist, R. - Ullakko, K.
Highly mobile twin boundaries in seven-layer modulated Ni-Mn-Ga-Fe martensite.
Scripta Materialia. Roč. 178, Mar (2020), s. 62-66. ISSN 1359-6462. E-ISSN 1872-8456
Grant CEP: GA ČR(CZ) GA17-00062S
Institucionální podpora: RVO:68378271
Klíčová slova: magnetic shape memory * martensite * twin boundary * Ni-Mn-Ga * Heusler alloy
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 5.611, rok: 2020
Způsob publikování: Open access
https://doi.org/10.1016/j.scriptamat.2019.10.042

We report on low twinning stress of 0.2 MPa for type 1 twin boundaries with rational (101) twinning plane and 0.1 MPa for type 2 twin boundaries with rational [01] twinning direction, in Ni2MnGa0.8Fe0.2 seven-layer modulated martensite exhibiting about 12% stress-induced strain. The studied samples were free of compound twins with (100) and (110) twinning planes. The martensite lattice is monoclinic and shows a long-period commensurate modulation with wave vector q=(2/7)g110, where g110 is the reciprocal lattice vector. The investigated alloy has high potential for practical applications due to the low twinning stress and the elevated Curie point TC=400 K.

Trvalý link: http://hdl.handle.net/11104/0309104