A hardening effect associated with stage III recovery in neutron irradiated molybdenum

Polycrystalline tensile specimens of molybdenum of average grain diameter 75 mu were irradiated at approximates 40 deg C with an epithermal neutron dose of approximately 2 x 10/sup 18/ nvt. Specimens were annealed for one hour at temperatures of unirradiated specimens, irradiated and annealed specimens, and irradiated but unannealed specimens were tested at room temperature in a tensometer at a strain rate of 0.9 x 10/sup -4/ sec.sup -1/. The effect of the radiation was to increase the yield stress without significantly altering the rest of the load-elongation curve. (C.E.S.)