A1 Journal article (refereed), original research

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


Open Access hybrid publication

Publication Details
Authors: Sozinov Alexei, Musiienko Denys, Saren Andrey, Vertát Petr, Straka Ladislav, Heczko Oleg, Zelený Martin, Chulist Robert, Ullakko Kari
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Scripta Materialia
Volume number: 178
Start page: 62
End page: 66
Number of pages: 5
ISSN: 1359-6462
eISSN: 1872-8456
JUFO-Level of this publication: 3
Open Access: Open Access hybrid publication

Abstract

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 [-101] 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.


Last updated on 2020-20-03 at 10:03