TY - JOUR
T1 - Influence of heat treatment on hydrogen ingress into V-4Cr-4Ti alloy
AU - Hayakawa, Ryo
AU - Hatano, Yuji
AU - Fukumoto, Ken Ichi
AU - Matsui, Hideki
AU - Watanabe, Kuniaki
N1 - Funding Information:
The authors would like to express their sincere thanks to Professor T. Muroga and Dr T. Nagasaka of National Institute for Fusion Science for supply of NIFS-HEAT-2 specimens. This study is supported in part by a Grant-in-Aid for Scientific Research (B) of Ministry of Education, Culture, Sports, Science and Technology of Japan, No. 14380218.
PY - 2004/8/1
Y1 - 2004/8/1
N2 - Specimens of V-4Cr-4Ti alloy were heated at 1273 K in vacuum, and the influence of this heat treatment on H2 absorption was examined at temperatures from 523 to 1023 K under the presence of water vapor of 10 -5 Pa. The rate of H2 absorption was significantly reduced by the heat treatment in the temperature range examined. Such reduction in the absorption rate was ascribed to the surface segregation of Ti and increase in surface oxygen coverage caused by preferential oxidation of segregating Ti by water vapor. Comparison with data reported by other researchers [J. Nucl. Mater. 233-237 (1996) 376; Fusion Technol. 34 (1998) 868; J. Nucl. Mater. 233-237 (1996) 510] indicated the strong barrier effect of Ti oxide against hydrogen ingress.
AB - Specimens of V-4Cr-4Ti alloy were heated at 1273 K in vacuum, and the influence of this heat treatment on H2 absorption was examined at temperatures from 523 to 1023 K under the presence of water vapor of 10 -5 Pa. The rate of H2 absorption was significantly reduced by the heat treatment in the temperature range examined. Such reduction in the absorption rate was ascribed to the surface segregation of Ti and increase in surface oxygen coverage caused by preferential oxidation of segregating Ti by water vapor. Comparison with data reported by other researchers [J. Nucl. Mater. 233-237 (1996) 376; Fusion Technol. 34 (1998) 868; J. Nucl. Mater. 233-237 (1996) 510] indicated the strong barrier effect of Ti oxide against hydrogen ingress.
UR - http://www.scopus.com/inward/record.url?scp=3342917606&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2004.04.078
DO - 10.1016/j.jnucmat.2004.04.078
M3 - 会議記事
AN - SCOPUS:3342917606
SN - 0022-3115
VL - 329-333
SP - 411
EP - 415
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3 PART A
T2 - Proceedings of the 11th Conference on Fusion Research
Y2 - 7 December 2003 through 12 December 2003
ER -