Numerical study of the metal vapour transport in tungsten inert-gas welding in argon for stainless steel
Junting Xiang, Fiona E Chen, Hunkwan Park, Keigo Tanaka, Masaya Shigeta, Manabu Tanaka, Anthony B Murphy
Applied Mathematical Modelling | ELSEVIER SCIENCE INC | Published : 2020
Metal vapour emanating from the weld pool during tungsten-inert-gas (TIG) welding affects the arc welding process. To understand the transport mechanisms of metal vapour in a TIG arc, an axisymmetric computational model is developed that includes the tungsten cathode, stainless-steel anode workpiece and the arc plasma region self-consistently. The combined diffusion coefficient method, which calculates diffusion coefficients due to mole fraction gradients (ordinary diffusion), temperature gradients, pressure gradients and the electric field is used to treat iron–chromium–argon and iron–chromium–helium plasmas. It was found that in both cases, metal vapours can reach the cathode region. The e..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. 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.