SYMPOSIA PAPER Published: 01 January 2004

Varying Temperature Irradiation Effects of V-4Cr-4Ti Alloy with Small Addition of Si, Al and Y


To evaluate the effects of temperature varying neutron irradiation of the V-4Cr-4Ti alloys with small addition of Si, Al and Y, microstructure observation and micro Vickers hardness test were carried out after one cycle varying temperature neutron irradiation at the Japan Material Test Reactor (JMTR). On a temperature increase from 200 to 350°C, the hardness of the alloys decreased. It is possible to explain the appearance of a vacancy-rich state after the temperature change and subsequent mutual disappearance of interstitials and the vacancies. Following the temperature change from 375 to 500°C, the hardness of the alloys increased, therefore, the vacancy-rich state might not appear due to stable defect clusters formed at the lower temperature conditions.

Author Information

Satou, M
Tohoku University, Sendai, Japan
Nakayashiki, H
Tohoku University, Sendai, Japan
Chuto, T
Tohoku University, Sendai, Japan National Institute for Materials Science, Ibaraki, Japan
Hasegawa, A
Tohoku University, Sendai, Japan
Abe, K
Tohoku University, Sendai, Japan
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Developed by Committee: E10
Pages: 714–724
DOI: 10.1520/STP11269S
ISBN-EB: 978-0-8031-5494-0
ISBN-13: 978-0-8031-3477-5