The different modes of molten metal transfer makes up a critical aspect of welding behavior which significantly affects weld quality, so having basic understanding of the fluidity behavior of the molten weld metal will help Fabrication experts to produce weld structures with optimal strength and quality. In this present work, the Expert analysis of TIG molten weld metal fluidity using the Bond dimensionless Number was achieved. An expert experimental design was done generating 30 sets of experimental runs considering current voltage wire diameter and wire feed rate and the bond dimensionless number as response. The second order quadratic model was developed employing the response surface methodology. A model having 89% coefficient of determination and p-value of < 0.0001. The result obtained showed that current has a very significant effect on the bond number indicating that a higher current will minimize the bond which translates into an improved fluidity of the TIG molten weld metal.

Keywords : Bond Number, Dimensionless, Expert System, Mild Steel, Tungsten Inert Gas, Fluidity.