| The effects of neutron-irradiation and post-irradiation annealing on the mechanical properties of interstitial free Mo and Mo-0.5V alloy was studied. Specimens were irradiated at a temperature of approximately 573 K to a fast neutron fluence of 1.3×10^(24) n/㎡ (E≥1 MeV) and subsequently annealed at 873 K and 1073 K. The results obtained are as follows; 1. Ductile-brittle transition temperature (DBTT) was raised about 130 K by fast neutron irradiation of 1.3×10^(24) n/㎡ at 573 K. 2. Post-irradiation annealing at 873 K increased the strength, while annealing at 1073 K decreased the strength. 3. The relationship between yield stress increment, Δδ_y, and hardness increment, ΔH_v, can be expressed by Δσ_y ○ 3.4 (ΔH_v) MPa. |
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