Microstructure and martensitic transformation in the Fe-Mn-Al-Ni shape memory alloy with B2-type coherent fine particles

T. Omori; M. Nagasako; M. Okano; K. Endo; R. Kainuma

doi:10.1063/1.4769375

Microstructure and martensitic transformation in the Fe-Mn-Al-Ni shape memory alloy with B2-type coherent fine particles

T. Omori, M. Nagasako, M. Okano, K. Endo, R. Kainuma

Research output: Contribution to journal › Article › peer-review

56 Citations (Scopus)

Abstract

Microstructure and martensitic transformation yielding a magnetic change were investigated for Fe_43.5Mn₃₄Al₁₅Ni _7.5 alloy with B2-type fine precipitates. Thermoelastic martensitic transformation from the ferromagnetic parent phase to the weak magnetic martensite with a nano-twinned fcc structure was confirmed. High-angle annular dark-field scanning transmission electron microscopic observation revealed that a β particle of about 10 nm maintains coherency with the matrix martensite phase, even though distorted due to the martensitic transformation. The martensitic transformation temperatures decreased about 75 K by application of a magnetic field of 70 kOe and magnetic field-induced reverse martensitic transformation was confirmed.

Original language	English
Article number	231907
Journal	Applied Physics Letters
Volume	101
Issue number	23
DOIs	https://doi.org/10.1063/1.4769375
Publication status	Published - 2012 Dec 3

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4769375

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title = "Microstructure and martensitic transformation in the Fe-Mn-Al-Ni shape memory alloy with B2-type coherent fine particles",

abstract = "Microstructure and martensitic transformation yielding a magnetic change were investigated for Fe43.5Mn34Al15Ni 7.5 alloy with B2-type fine precipitates. Thermoelastic martensitic transformation from the ferromagnetic parent phase to the weak magnetic martensite with a nano-twinned fcc structure was confirmed. High-angle annular dark-field scanning transmission electron microscopic observation revealed that a β particle of about 10 nm maintains coherency with the matrix martensite phase, even though distorted due to the martensitic transformation. The martensitic transformation temperatures decreased about 75 K by application of a magnetic field of 70 kOe and magnetic field-induced reverse martensitic transformation was confirmed.",

author = "T. Omori and M. Nagasako and M. Okano and K. Endo and R. Kainuma",

note = "Funding Information: This study was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS). A part of this work was carried out at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.",

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AU - Omori, T.

AU - Nagasako, M.

AU - Okano, M.

AU - Endo, K.

AU - Kainuma, R.

N1 - Funding Information: This study was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS). A part of this work was carried out at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.

PY - 2012/12/3

Y1 - 2012/12/3

N2 - Microstructure and martensitic transformation yielding a magnetic change were investigated for Fe43.5Mn34Al15Ni 7.5 alloy with B2-type fine precipitates. Thermoelastic martensitic transformation from the ferromagnetic parent phase to the weak magnetic martensite with a nano-twinned fcc structure was confirmed. High-angle annular dark-field scanning transmission electron microscopic observation revealed that a β particle of about 10 nm maintains coherency with the matrix martensite phase, even though distorted due to the martensitic transformation. The martensitic transformation temperatures decreased about 75 K by application of a magnetic field of 70 kOe and magnetic field-induced reverse martensitic transformation was confirmed.

AB - Microstructure and martensitic transformation yielding a magnetic change were investigated for Fe43.5Mn34Al15Ni 7.5 alloy with B2-type fine precipitates. Thermoelastic martensitic transformation from the ferromagnetic parent phase to the weak magnetic martensite with a nano-twinned fcc structure was confirmed. High-angle annular dark-field scanning transmission electron microscopic observation revealed that a β particle of about 10 nm maintains coherency with the matrix martensite phase, even though distorted due to the martensitic transformation. The martensitic transformation temperatures decreased about 75 K by application of a magnetic field of 70 kOe and magnetic field-induced reverse martensitic transformation was confirmed.

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Microstructure and martensitic transformation in the Fe-Mn-Al-Ni shape memory alloy with B2-type coherent fine particles

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