Effect of pulsed ultrasonic on arc acoustic binding in pulsed ultrasonic wave-assisted pulsed gas tungsten arc welding |
| |
| Authors: | Jianfeng Wang Jinping Liu Bin Wang Jicai Feng |
| |
| Affiliation: | 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, China;2. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, China;3. China Nuclear Industry 23 Construction Co. Ltd, Beijing, China;4. China academy of launch vehicle technology, Tianjin, China |
| |
| Abstract: | This paper investigated the effect of pulsed ultrasonic on the microstructure and mechanical properties of weld joints using novel pulsed ultrasonic wave-assisted pulsed gas tungsten arc welding. The principle of proposed method was to apply pulsed ultrasonic to the welding process during background current. The results indicated that arc contraction degree, weld pool oscillation, and weld penetration were remarkably enhanced by applying pulsed ultrasonic. The microstructure refined by pulsed ultrasonic was much finer than those refined by continuous ultrasonic due to the more stable ultrasonic field in arc zone and consequent stronger fluid flow in weld pool. Furthermore, tensile strength of the joints with pulsed ultrasonic was significantly improved compared with that of the joints with no and continuous ultrasonic. |
| |
| Keywords: | Pulsed ultrasonic welding arc morphology microstructure mechanical property |
|
|
