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内容記述 |
F82H steel used for the first wall of fusion reactors is subjected not only to radiation effects but also to thermal stresses caused by temperature gradients. This means evaluation under combined environmental conditions is necessary. However, since neutron irradiation under stress is difficult, ion irradiation needs to be used as an alternative. Ion irradiation has limitations in depth, but nanoindentation enables measurement within a limited irradiated area. In addition, nanoindentation hardness can be converted to Vickers hardness and tensile stress. However, conversion equations must be derived for each material.Based on the above, the objectives of this study are as follows:1. To derive a correlation equation between nanoindentation hardness and Vickers hardness for F82H.2. To evaluate the effect of irradiation under tensile stress on hardnessConclusions1. The correlation between Vickers and nanoindentation hardness in F82H steel is expressed by the following equation. 𝑯𝑽 = 𝟒𝟏. 𝟒 × 𝑯𝟎 + 𝟖𝟖. 𝟑 2. Tensile stress suppressed irradiation hardening, but detailed research is required to elucidate the cause. |
