Experimental Investigation and Numerical Modeling of Macro and Micro Scale Plasma Are Welding Process

Abstract

The critical issue of manufacturing and assembly industries on material joining newlineprocesses is to achieve the quality of weld joints with minimum thermal stresses and distortion. newlinePlasma arc welding, as an advanced fusion welding technique, possesses the ability to create newlinequality weld joints with minimal flaws and strong structural integrity. The welding process newlineopens an avenue to join a variety of materials using high-density welding methods by newlinecontrolling the process parameters. Moreover, compared to other fusion welding methods, newlineplasma arc welding possesses an edge in terms of flexibility and versatility, allowing to joining newlineof diverse materials by adjusting various process parameters to create distinct welding modes, newlineincluding conduction, transition, and keyhole welding. Understanding the phenomenon of newlinewelding mechanism and interaction within the weldment and its periphery plays a critical role newlinein improving the quality of the weld joint. Moreover, several interactive phenomena take place newlineduring the fusion welding process such as heating, melting, vaporization, and solidification of newlinemetal elements from the surface and inside the weld pool. The performance and quality of the newlineweld joint are mainly evaluated by examining the distribution of residual stress and thermally newlineinduced distortion, even with efforts being taken to reduce undesirable influence during the newlinefusion welding process. However, the welding-induced distortions and residual stresses depend newlineon the thermal phenomena involved in the fusion welding process. Consequently, there is a newlinepersistent need in the welding industry for simplified experimental methods that can offer newlineinsights into the time-temperature history, weld bead dimensions, as well as welding-induced newlinedistortions, and residual stresses.