EFFECT OF NEUTRON-IRRADIATION ON TENSILE PROPERTIES OF V-CR-TI ALLOYS

The tensile properties of V-4Cr-4Ti, V-9Cr-5Ti, V-14Cr-5Ti, V-3Ti-1Si, V-5Ti, and V-18Ti alloys were determined at 25, 420, 520, and 600 degrees C after neutron irradiation to 28-46 dpa at 420, 520, and 600 degrees C. The yield strength of the unirradiated alloys increased significantly (similar to 50%) upon neutron irradiation. Irradiation hardening of the alloys at 25 degrees C after irradiation at 420 degrees C was in the order of V-18Ti < V-3Ti-1Si < V-5Ti < V-4Cr-4Ti < V-9Cr-5Ti < V-14Cr-5Ti. Total elongation of the irradiated alloys at 25 degrees C after irradiation at 420 degrees C ranged from 3 to 11%, with total elongation of the alloys in the order of V-14Cr-5Ti < V-9Cr-5Ti < V-3Ti-1Si < V-5Ti < V-4Cr-4Ti < V-18Ti. The total elongation of the alloys at 600 degrees C after irradiation ranged from 11 to 23%, with total elongation of the alloys in the order of V-14Cr-STi < V-9Cr-5Ti < V-4Cr-4Ti < V-5Ti < V-3Ti-1Si < V-18Ti.