Identifying the Effect of PWHT on Strength of Laser Beam Welding Joints of AA2024 Aluminum Alloy

Abstract

The corrosion-resistant and strength-to-weight ratios are the primary factors in high-strength aluminum alloy. Hence, the AA2024 alloy is a possible candidate in the critical structural fabrication industry. The traditional joining method is ineffective for welding aluminum alloys. Higher melting point and temperature variations cause alloy isolation

porosity and hot cracking are caused by melting point variations. As a result, to fabricate joints, a light heat source laser beam was used. The weaker area of most fusion-welded joints was the heat-affected zone (HAZ). The post-weld heat treatment was used at HAZ to improve the properties. According to the experimental findings, the joint welded with solution treatment and artificial aging had a maximum tensile strength of 358 MPa. Re-precipitation of precipitates may accomplish in HAZ.