TY - JOUR
T1 - The influence of helium co-implantation on ion-induced hardening of low activation ferritic steel evaluated by micro-indentation technique
AU - Katoh, Y.
AU - Tanigawa, H.
AU - Muroga, T.
AU - Iwai, T.
AU - Kohyama, A.
PY - 1999
Y1 - 1999
N2 - An experimental technique to determine the dual-ion irradiation-induced hardening of solid materials by means of micro-indentation was developed and then applied to evaluate the irradiation response of low activation martensitic steel. Micro-hardness measurements were performed on a low activation Fe-9Cr-2W steel (JLF-1) which was obtained following bombardment of 4 MeV nickel ions up to 1 dpa with simultaneous deposition of helium ions at 0-100 appm He/dpa in a temperature range of 573-873 K. The obtained micro-hardness profiles corresponded to the expected hardness profiles. The increasing He/dpa ratio almost monotonically increased the micro-hardness at 673 K and higher temperatures. However, the irradiation-induced micro-hardness changes were no more than 10% except for very limited cases. Isothermal annealing at temperatures above 773 K caused softening within a thin surface layer of the specimens and only a small amount of helium prohibited the softening.
AB - An experimental technique to determine the dual-ion irradiation-induced hardening of solid materials by means of micro-indentation was developed and then applied to evaluate the irradiation response of low activation martensitic steel. Micro-hardness measurements were performed on a low activation Fe-9Cr-2W steel (JLF-1) which was obtained following bombardment of 4 MeV nickel ions up to 1 dpa with simultaneous deposition of helium ions at 0-100 appm He/dpa in a temperature range of 573-873 K. The obtained micro-hardness profiles corresponded to the expected hardness profiles. The increasing He/dpa ratio almost monotonically increased the micro-hardness at 673 K and higher temperatures. However, the irradiation-induced micro-hardness changes were no more than 10% except for very limited cases. Isothermal annealing at temperatures above 773 K caused softening within a thin surface layer of the specimens and only a small amount of helium prohibited the softening.
UR - http://www.scopus.com/inward/record.url?scp=3342889871&partnerID=8YFLogxK
U2 - 10.1016/S0022-3115(98)00701-6
DO - 10.1016/S0022-3115(98)00701-6
M3 - Conference article
AN - SCOPUS:3342889871
SN - 0022-3115
VL - 271-272
SP - 115
EP - 119
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
T2 - Proceedings of the 1997 8th International Conference on Fusion Reactor Materials (ICFRM-8), Part C
Y2 - 26 October 1997 through 31 October 1997
ER -