Huang, Hanchen

Jin, Cheng

English

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8th International Conference on Physical and Numerical Simulation of Materials Processing (ICPNS)14–17 October 2016Seattle, Washington | Hosted by Purdue UniversitySESSION 8: POSTER, GRAND PACIFIC BALLROOMSUNDAY, OCTOBER 15, 2016A molecular dynamics study of activated tungsten inert gas welding processCheng Jin, Dalian Jiaotong University; Hanchen Huang, Northeastern UniversityABSTRACTIn the present work, the mechanism of the activated tungsten inert gas (A-TIG) welding is studied by using molec-ular dynamics method. The effect of flux molecules on the flow and geometry of weld pool is analyzed by atoms trajectories and thermal properties calculations. It shows that the flux, especially some oxidizes, can change the temperature dependence of surface tension grads from a negative value to a positive value. The fluid flow will be inward along the surface of the weld pool toward the center and then down to the pool bottom and produces a rel-atively deep and narrow weld. By molecular dynamics calculations, some common characteristics of the activating flux in A-TIG welding are also proposed which are helpful to choose or design a suitable flux.

A molecular dynamics study of activated tungsten inert gas welding process

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1304&amp;context=icpns

A molecular dynamics study of activated tungsten inert gas welding process

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