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Defect Structures of Intermetallic FeRh Alloys Induced by High-Speed Deformation

Published online by Cambridge University Press:  11 February 2011

Yasunori Kibata ,
Fuminobu Hori ,
Ryuichiro Oshima ,
Masao Komatsu  and
Michio Kiritani
Yasunori Kibata
Affiliation:
Graduate School of Engineering, Osaka Prefecture University, Sakai 599–8531, Japan
Fuminobu Hori
Affiliation:
Research Institute for Advanced Science and Technology, Osaka Prefecture University, Sakai 599–8570, Japan
Ryuichiro Oshima
Affiliation:
Research Institute for Advanced Science and Technology, Osaka Prefecture University, Sakai 599–8570, Japan
Masao Komatsu
Affiliation:
Research Center for Ultra-High-Speed Plastic Deformation, Hiroshima Institute of Technology, 2–1–1 Miyake, Saekiku, Hiroshima 731–5143, Japan
Michio Kiritani
Affiliation:
Research Center for Ultra-High-Speed Plastic Deformation, Hiroshima Institute of Technology, 2–1–1 Miyake, Saekiku, Hiroshima 731–5143, Japan
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Abstract

In order to study the role of vacancy-type defects in the unique deformati on-induced phase transition mechanisms of B2-L10 and B2-A1 of intermetallic compound Fe-Rh alloys, high-speed impact compression deformation has been carried out. Induced phases and substructures were examined by XRD and TEM. The relation between the phase transitions and vacancy-type defects was investigated by the positron annihilation Coincidence Doppler Broadening (CDB) method. The results showed that intermixed phases of L10 and A1 were always formed in the B2 phase, and the vacancy concentrations were rather decreased in the specimens deformed by higher strain rates, suggesting that vacancies were more consumed by the phase transition to A1 structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 753: Symposium BB – Defect Properties and Related Phenomena in Intermetallic Alloys , 2002 , BB5.38
Copyright
Copyright © Materials Research Society 2003

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References

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