[3O01-06] Cladding Materials 1

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[3O02] Suppression of irradiation hardening in W-coated F82H produced by underwater explosive-welding

*Kotaro Seki¹, Kazuyuki Hokamoto², Shigeru Tanaka², Takaaki Koyanagi³, Kenta Yoshida¹, Akira Hasegawa¹, Sosuke Kondo¹, Hao Yu¹, Yasuyuki Ogino¹, Ryuta Kasada^1,4 (1. Tohoku Univ., 2. Kumamoto Univ., 3. Oak Ridge National Laboratory, 4. National Institute for Fusion Science)

Keywords:

W/F82H,underwater explosive-welding,neutron irradiation,irradiation hardening

As a first wall material for fusion reactor blankets, W-coated F82H (W/F82H), which is tungsten material coated on reduced activation ferritic steel as a base material, has been developed. However, not much is known about the mechanical properties of W/F82H after neutron irradiation. The aim of this study is therefore to clarify the effect of neutron irradiation on the mechanical properties of W/F82H claddings prepared by the underwater explosive-welding. From the results of Vickers tests on W/F82H, it was confirmed that W/F82H can be divided into three different regions. Comparison of the hardness of these regions before and after neutron irradiation showed that irradiation hardening was suppressed in all regions. This is due to the irradiation softening and hardening occurring.