Positron Annihilation Study on Defects and Phase Transition of FeRh Alloys Subjected to High-Speed Deformation

The relations between vacancy-type defects in Fe-40, 45, and 50 at%Rh alloys and stress-induced phase transitions from a B2 phase have been examined by XRD, TEM, and positron annihilation experiments. The specimens were deformed at room temperature by a high-speed compression machine, and the nature...

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Bibliographic Details
Published in:Radiation effects and defects in solids 2002-01, Vol.157 (1-2), p.127-135
Main Authors: Oshima, R., Hori, F., Fukuzumi, M., Komatsu, M., Kiritani, M.
Format: Article
Language:English
Subjects:
High-speed Deformation
Iron-Rhodium Alloy
Positron Annihilation
Stress-induced Phase Transition
Transmission Electron Microscopy
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Summary:The relations between vacancy-type defects in Fe-40, 45, and 50 at%Rh alloys and stress-induced phase transitions from a B2 phase have been examined by XRD, TEM, and positron annihilation experiments. The specimens were deformed at room temperature by a high-speed compression machine, and the natures of related vacancies and vacancy clusters were examined. The results reveal that structural Rh vacancies exist in non-stoichiometric FeRh alloys, and that lifetimes of the long-lifetime components of the introduced defects change in various manners, depending upon the deformation conditions.
ISSN:1042-0150
1029-4953
DOI:10.1080/10420150211400