Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 115-119 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 271-272 |
| DOIs | |
| State | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1997 8th International Conference on Fusion Reactor Materials (ICFRM-8), Part C - Sendai, Japan Duration: Oct 26 1997 → Oct 31 1997 |
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