Manufacturing Technology and Material Characterization of Ti44Ni47Nb9 Alloy Fastener Ring by Tungsten Inert Gas Welding
The advanced manufacturing technology of TiNiNb wide hysteresis shape memory alloy fastener ring was performed by using the tungsten inert gas (TIG) welding technique. It was found that transformation temperatures of the joint were about 20 °C higher than these of the base alloy, which should be ascribed to the heat treatment in the joint caused by welding. The strain recovery behavior of the ring after the diameter expanding process was studied. For the ring with the diameter expansion of 16% and without the heat treatment after welding, the strain recovery began at 55°C and ended at 75°C. It is concluded that, by appropriate expanding diameter process, TIG welding technique is suitable for the production of TiNiNb wide hysteresis shape memory fastener ring.
Daizhong Su, Qingbin Zhang and Shifan Zhu
Y. G. Song et al., "Manufacturing Technology and Material Characterization of Ti44Ni47Nb9 Alloy Fastener Ring by Tungsten Inert Gas Welding", Key Engineering Materials, Vols. 419-420, pp. 529-532, 2010