Interrelationship Modeling Among Weld Strength Improvement by Parametric Approach in TIG Welding using DEMATEL Software

Abstract

Tungsten Inert Gas (TIG) welding is an important and versatile welding technique used across the globe to join ferrous materials such as mild steel and nonferrous materials like stainless steel, aluminum alloys, and copper alloys. TIG welding technique has various parameters like current type, depth of penetration, length of the arc, welding speed, inert gas flow rate, and much more. These parameters are essential in obtaining a weld with desired strength and properties. By controlling these parameters, a sound and strong weld joint can be obtained. In this paper, five important parameters are selected, and a cause and effect diagram is plotted using DEMATEL (Decision Making Trail and Evaluation Laboratory) software. Then the degree of importance is calculated to find which of the five parameters are causes and which of the given parameters are effects. Further, a sensitivity test is done to check whether the results obtained from the used approach are feasible or not.