Optimization of TIG and EB welding parameters to improve tensile strength and corrosion resistance of AA2219-T87 aluminium-alloy

AA2219-T87 Aluminium - alloy is widely seen in various strategic applications due to the combination of good weldability and superior corrosion resistance. The welding procedures and welding parameters significantly affect the weldability and mechanical properties of aluminium alloys. In the current study, AA2219 alloy is welded using tungsten inert gas (TIG) and electron beam (EB) welding procedure to observe process parameters’ effect on tensile and corrosion properties. The experiments were planned by Box-Behneken design in which all the selected parameters were varied within a given range. Analysis of variance (ANOVA) was conducted, which established, that welding current is the major influencing parameter in TIG and EBW processes. The primary objective of the study is to develop the fitted mathematical model by integrating welding process parameters to predict the properties. The developed mathematical model was optimized by response surface methodology (RSM) to achieve the better ultimate tensile strength and corrosion resistance of AA2219 alloy upon welding by TIG, and EB welding process.