Gas metal arc welding process parameter optimization for AA7075 T6

Abstract

Abstract Aluminium alloy 7075 T6 weld joints having size of plates 125 mm ×100 mm × 10 mm experimented to investigate the effects of process input parameters on the thermal, mechanical properties of GMAW. The process input parameters like current (A), heat flux (Q), flow rate of gas (G), speed of welding (S), wire feed rate (F) & shielding gas are affecting the thermal, metallurgical & mechanical properties of weldment. This experimental study aims at developing mathematical models for bead height (HB), bead width (WB) and bead penetration (PB) and investigating the effects of four process parameters This experimental analysis aims at temperature study for selection of process parameter & prediction of the bead geometry. The heat flows during welding process controls the grain size & material properties. The temperature spread is vital in affecting characteristic of weld joint. Transient thermal analysis gives temperature & residual stress distribution at varied mode of heat transfer phases.