1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China
2. Shandong Institute of Shipbuilding Technology, Weihai 264209, China
3. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China
4. China Oil & Gas Pipeline Network Corporation, Beijing 100101, China