[2L05-07] Material Engineering for Fusion Applications

[2L06] Effects of annealing temperature on microstructure and mechanical properties of high purity vanadium alloys

*Jingjie Shen^1,2, Takuya Nagasaka^1,2, Kazuki Saito², Masayuki Tokitani^1,2, Takeo Muroga^1,2, Ryuta Kasada³ (1. NIFS, 2. SOKENDAI, 3. Tohoku Univ.)

Keywords:High purity vanadium alloy, Annealing, Precipitation, Hardness, Tensile properties

Low-activation vanadium alloy is regarded as a candidate structural material for fusion reactor. To shorten the recycling periods of vanadium alloy after fusion reactor shutdown, high purity vanadium alloys containing about 300 mass ppm interstitial impurities (e.g., carbon, nitrogen, oxygen) with various levels of titanium and chromium concentrations were developed at NIFS. In this study, aiming at revealing the precipitation and recrystallization behavior of the high purity vanadium alloys, the effects of annealing temperature on microstructure and mechanical property of cold-rolled vanadium alloys were investigated.