Ta-(10～15)W alloys were melted by electron beam furnace, upset-forged and rolled to the final plates of 7.0mm and 1.0mm in thickness. Each of the samples for property measurements was annealed to obtain a fully recrystallized microstructure. The property measurements at the room temperature show that the strength and hardness of alloys increase linearly with the tungsten content in alloys, but the ductility of these alloys does not change strikingly. Taking the advantage of the strengthening effect of W for Ta, the Ta-W binary alloys with a higher intensty and excellent ductility would be obtained. There exists a linear relation between the strength and vickers hardness in Ta-(10～15)W alloys. These alloys also obey the athermal solid solution hardening mechanism. However, the measured hardness values of these alloys at the room temperature are less than the calculated values based on the model, which indicates that the Ta-W alloys with 15at% W are also able to cold-roll. The present several Ta-W alloys exhibit an uniform recrystallized microstructure, which would ensure these alloys to possess an excellent ductility and toughness.
Rare Metal Materials and Engineering
Ta-W binary alloy,mechanical properties, solid solution hardening