Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 44 / Number 1 / Pages 219-223
H. Tanigawa, M. Ando, T. Sawai, K. Shiba, N. Hashimoto, R. L. Klueh
Fusion Science and Technology / Volume 44 / Number 1 / Pages 219-223
Format:electronic copy (download)
Previous work reported that a TIG weld joint of F82H exhibited low irradiation hardening in a tensile test, compared to the base metal. Microhardness tests and microstructure observation on the neutron-irradiated TIG weld joint of F82H revealed that the over-tempered zone in the heat-affected zone (HAZ) exhibited this good performance. The region in the HAZ where the prior austenite grain size became very fine during welding also exhibited lower irradiation hardening. Hypotheses for these low-hardening mechanisms were proposed based on the phase diagram and grain size.
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