Numerical study of the effects and transport mechanisms of iron vapour in tungsten inert-gas welding in argon
Junting Xiang, Hunkwan Park, Keigo Tanaka, Masaya Shigeta, Manabu Tanaka, Anthony B Murphy
Journal of Physics D | IOP PUBLISHING LTD | Published : 2020
Tungsten inert-gas (TIG) welding uses an electric arc between a tungsten cathode and a metal anode to partially melt the anode workpiece, forming a weld pool. Metal vapour emanating from the weld pool has important effects on the arc welding process. An axisymmetric computational model of the arc and weld pool is used to examine the transport and influence of iron vapour on an argon arc plasma. In contrast to previous studies that use approximate and incomplete treatments of diffusion, the present model incorporates the combined diffusion coefficient method, which takes into account all important driving forces. The influence of metal vapour is first examined for an arc current of 400 A. Met..View full abstract
Awarded by Fundamental Research Program of the Korea Institute of Materials Science (KIMS)
JX thanks the CSIRO Research Plus Postdoctoral Fellowship scheme for support of this work and Dr Fiona F Chen of CSIRO for helpful discussions and assistance in data analysis. HP acknowledges the support from the Fundamental Research Program (No. PNK6350) of the Korea Institute of Materials Science (KIMS). KT, MS and MT acknowledge the support of the Structural Materials for Innovation of the Cross-ministerial Strategic Innovation Promotion Program (SIP) of Japan Science and Technology Agency.