High Frequency Pulse Tungsten Arc Welding Process Trials of TA15 Titanium Alloy
WAN Xiaohui1,2, ZHAO Haitao1,2, JIN Junlong1,2
(1. AVIC Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China;
2. Key Laboratory of Aeronautical Technology for Welding and Joining Technology, Beijing 100024, China)
Abstract：High frequency pulse tungsten arc welding process trials of TA15 titanium alloy are carried out. The microscopic
structures and properties of weld with high frequency TIG and conventional TIG are compared based on metallographic
test and mechanical test. The results show that the width of high frequency TIG weld is obviously narrower and the
grain size is decreased by more than 30%. It also shows that the alpha phase layer is thicker than that of the conventional
welding, and the distribution is more regular and more ordered. The tensile strength of the ultra high frequency pulse welding
joint is equal to that of the conventional argon arc welding, and the plasticity is better, the fatigue property is higher.
2017, 
