EXPERIMENTAL INVESTIGATION OF HOT CRACKING SUSCEPTIBILITY OF WROUGHT ALUMINUM ALLOYS

摘要

The process of gas tungsten arc (GTA) and gas metal arc (GMA) welding of heat treatable wrought aluminum alloys 6005-T6 and 6082-T6, filler metal composition and preheating temperature as the main factors affecting the formation of hot cracking are considered. It has been shown in experiments that specimens welded with 5356 filler wire are more prone to hot cracking than those welded with 4043 wire, and GMAW demonstrates less cracks than GTAW due to its lower heat input. The effect of preheating proves to have little or no consequence.