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Radiation Effects on the Plasticity and Microstructure of Ti-Al-V Alloys Containing β Phase

Published online by Cambridge University Press:  21 March 2011

Tomotsugu Sawai ,
Masayuki Tabuchi ,
Eiichi Wakai  and
Akimichi Hishinuma
Tomotsugu Sawai
Affiliation:
Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195, Japan
Masayuki Tabuchi
Affiliation:
Hakodate National College of Technology, Hakodate-shi, Hokkaido, 042-8501, Japan
Eiichi Wakai
Affiliation:
Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195, Japan
Akimichi Hishinuma
Affiliation:
Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195, Japan
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Abstract

Tensile properties of Ti-35Al-15V and Ti-30Al-10V alloys were examined. These alloys contain β phase with ordered bcc structure. The total elongation of Ti-35Al-15V alloy abruptly changes from 10% to 60% around 620 ºC. Many transformation bands were observed in β grains that were highly deformed above this temperature. The hexagonal α2-phase grains in bands and the β–phase grains in bands and matrix were in Burgers type of orientation relationship. The ductility of Ti-30Al-10V alloy was highly affected by neutron irradiation. The specimens irradiated and tested at 400 °C showed almost no ductility. The total elongation of specimens irradiated and tested at 600 °C was about 10 %, while that of unirradiated ones was larger than 60 %. Specimens irradiated at 400 °C were also tested at 600 °C and the elongation was only 6 %, showing little recovery in ductility. This embrittlement suggests phase decomposition during irradiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 650: Symposium R – Microstructural Processes in Irradiated Materials-2000 , 2000 , R3.9
Copyright
Copyright © Materials Research Society 2001

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References

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