Non-conventional twins in five-layer modulated Ni-Mn-Ga martensite

SCRIPTA MATERIALIA

卷:162

Article

Seiner, Hanus¹  Chulist, Robert²  Maziarz, Wojciech²  Sozinov, Alexei³  Heczko, Oleg⁴  Straka, Ladislav⁴ 

[1] Czech Acad Sci, Inst Thermomech, Dolejskova 5, Prague 18200, Czech Republic

[2] Polish Acad Sci, Inst Met & Mat Sci, PL-30059 Krakow, Poland

[3] Lappeenranta Univ Technol, Mat Phys Lab, Laitaatsillantie 3, Savonlinna 57170, Finland

[4] Czech Acad Sci, Inst Phys, Na Slovance 2, Prague 18221, Czech Republic

关键词: Shape memory alloys (SMA);    Twinning;    Scanning electron microscopy (SEM);    Transmission electron microscopy (TEM);    Micromechanical modeling;   

DOI  :  10.1016/j.scriptamat.2018.12.020

来源: Elsevier

【 摘 要 】

We report observation of non-conventional twins (i.e. twins with neither the twinning plane being a lattice plane, nor the twinning direction being a lattice vector) in five-layer modulated martensite of the Ni-Mn-Ga ferromagnetic shape memory alloy. The twins were observed using scanning and transmission electron microscopy, and identified by calculations using the mathematical theory of martensitic microstructures. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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