Thermoelastic Martensite Transformations and the Properties of Ultrafine-Grained Ni54Mn20Fe1Ga25 Alloys Obtained by Melt Quenching

Studies of structural and phase transformations in the cast and melt-quenched ferromagnetic four-component alloy Ni 54 Mn 20 Fe 1 Ga 25 were performed using transmission and scanning electron microscopy and X-ray diffraction, The obtained data have been compared with the results of studies of physic...

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Bibliographic Details
Published in:Physics of metals and metallography 2018-10, Vol.119 (10), p.936-945
Main Authors: Marchenkova, E. B., Pushin, V. G., Kazantsev, V. A., Korolev, A. V., Kourov, N. I., Pushin, A. V.
Format: Article
Language:English
Subjects:
Alloys
Chemistry and Materials Science
Diffusion
Dilatometry
Elongation
Ferromagnetism
Magnetic permeability
Martensite
Martensitic transformations
Materials Science
Metallic Materials
Microstructure
Phase Transformations
Phase transitions
Physical properties
Quenching
Scanning electron microscopy
Structure
Thermal expansion
Ultrafines
X-ray diffraction
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Summary:Studies of structural and phase transformations in the cast and melt-quenched ferromagnetic four-component alloy Ni 54 Mn 20 Fe 1 Ga 25 were performed using transmission and scanning electron microscopy and X-ray diffraction, The obtained data have been compared with the results of studies of physical characteristics (electrical resistance, thermopower, magnetic susceptibility, magnetization, and temperature coefficients of linear expansion and relative elongation Δ L / L measured by the method of dilatometry) in the temperature range of 2–870 K. This work has established the effects of quenching on the microstructure, magnetic state, critical temperatures, and specific features of thermoelastic martensitic transformations in the alloy.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X18100095