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Martensitic Transformation in a Ti50ni48fe2 Alloy Studied by Eels

Published online by Cambridge University Press:  02 July 2020

Y. Murakami ,
D. Shindo ,
T. Oikawa  and
M. Kersker
Y. Murakami
Affiliation:
Institute for Advanced Materials Processing, Tohoku University, Katahira, Sendai980-77Japan
D. Shindo
Affiliation:
Institute for Advanced Materials Processing, Tohoku University, Katahira, Sendai980-77Japan
T. Oikawa
Affiliation:
JEOL Ltd, Akishima, Tokyo196, Japan
M. Kersker
Affiliation:
JEOL USA Inc., 11 Dearborn Road, Peabody, MA01960
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Martensitic transformation is the first-order diffusionless phase transformation in solids, and is responsible for unique phenomena such as shape memory effect and superelasticity. Recently, many researchers tried to explain the origin of martensitic transformations from a viewpoint of electronic structure. It is strongly required to investigate electronic state changes associated with a martensitic transformation by an accurate experiment. EELS (Electron Energy-Loss Spectroscopy) was successfully applied to study electronic state in several alloys and oxides, e.g. a composition dependence of density-of-state (DOS) in Cu-3d band was clearly observed for Cu1-xAlx alloys by a core-loss measurement. However, this method has been less applied to studies of phase transformations to date. The purpose of the present work is to investigate electronic state changes associated with a martensitic transformation in a Ti50Ni48Fe2 alloy by EELS.

A Ti50Ni48Fe2 alloy was prepared by induction-melting method. Thin-foiled specimens were solution-treated in Ar atmosphere at 1173K for 1hr.,

Type
Analytical Electron Microscopy
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 991 - 992
Copyright
Copyright © Microscopy Society of America 1997

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References

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