[2G07-10] Blanket Materials

[2G09] Microstructural change in He-irradiated V-Cr-Ti alloys with low Ti addition

*YICHEN ZOU¹, Ken-ichi FUKUMOTO², Ryoya Ishigami³, Takuya Nagasaka⁴ (1. University of Fukui, graduate school of engineering, 2. RINE/ Univ. of Fukui, 3. The Wakasa Wan Energy Research Center, 4. National Institute for Fusion Science)

Keywords:vanadium alloy, irradiation hardening, He ion irradiation, Trans-mission electron microscopy

In this study, to investigate the change in strength due to low Ti modification of V alloys and the effects of irradiation on strength and dimensional stability, He ion irradiation was performed on V alloys with varying impurity concentrations and Ti, Cr addition levels. Observations of the microstructure were made using a transmission electron microscope (TEM), and measurements of irradiation hardening were conducted using a nanoindentation hardness tester. The study aimed to obtain guidelines for the development of V alloys based on the correlation between microstructure and strength after irradiation.