Prof. Jiaxiang XUE

School of Mechanical and Automotive Engineering, South China University of Technology, China

Topic

Unsteady-state numerical simulation and process investigation of double pulsed GMAW

Abstract

    Lightweight is recognized as the development trend of advanced manufacturing technology in the future, aluminum alloy is an effective engineering material to achieve lightweight manufacturing. Double pulsed gas metal arc welding (DP-GMAW) is suggested as an advanced and efficient welding process for aluminum alloys, but the heat transfer and fluid flow behavior in the weld pool of DP-GMAW are not well understood. A perspective on the whole physical process of DP-GMAW is released by experiments and numerical simulations, and then the welding process parameters are optimized. The DP-GMAW process is improved, then a three-dimensional unsteady-state heat transfer and fluid flow model of double pulsed gas metal arc welding is proposed. The mechanism of grain refinement by double pulsed gas metal arc welding is revealed, grain refinement by DP-GMAW is achieved by higher solidification growth rate and cooling rate. Effect of current amplitude, current frequency, and welding speed on DP-GMAW is systematically investigated, and the welding process parameters are optimized. Modified DP-GMAW process are investigated, and their characteristics and advantages are indicated.

Biography

    Jiaxiang Xue received the degrees of BS (1983) and MS (1990) in Mechanical Engineering from Southeast University, China and Ph.D. (1995) in Automation from South China University of Technology, China, respectively. Subsequently, he worked as a Post-Doctoral Fellow at the South China University of Technology. From 1997, he worked at South China University of Technology. In 2006, he became a full professor in South China University of Technology for School of Mechanical and Automotive Engineering. Xue’s research is focused on the fundamental research of digital welding power supply, advanced welding process, and intelligence control system. He authored and co-authored over 60 peer-review international journal publications (including Scripta Materialia, International Journal of Advanced Manufacturing Technology, Welding Journal., etc.) Now he is serving as the senior member of Chinese Mechanical Engineering Society (CMES) and member of China Electrotechnical Society (CES). He is the member of editorial board of Transactions of the China Welding Institution and reviewer of Mechanical Systems and Signal Processing, International Journal of Advanced Manufacturing Technology and Chinese Journal of Mechanical Engineering.