The Effect of Welding Parameters in Micro Plasma Arc Welding of Titanium Thin Sheets

Abstract

The titanium alloy is most attractive metallic materials for biomedical, chemical industries marine and aerospace applications. The Titanium Grade 2 alloy is one of the most widely used titanium alloy as it has excellent weldability and good resistant to corrosion. Present work describes the experimentation on micro plasma welding of titanium alloy. Microplasma arc welding is carried out on 0.5mm thick Titanium alloy to characterise the effect of welding parameters. Firstly, the proper ranges of process parameters (i.e., current and welding speed) are evaluated to obtain better quality of weld by conducting bead-on-plate welding. Then welding is performed on square butt joint configuration. Welded specimens are analyzed by micro-tensile, hardness and microstructure for critical assessment of the performance of titanium alloy. It is found that there are a number of threshold parameters that can control weldment size in Practical conditions Welding parameter combinations in the five different speeds and current ranges of 10-14 A, producing the high quality welds with good strength and toughness properties are presented.