Investigation of Laser Surface Treatment on the Microstructure and Mechanical Properties of AlSiMn Alloy

Laser surface modiffication

Abstract

This work investigates high-temperature properties of AlSiMn alloy after laser remelting by continuous mode CO₂ laser energy. Substrate materials were prepared after solutionized heat- treated at 510^oC for 5 h followed by artificially aged at 160^oC for six hours. The result of the finding showed high improvement in mechanical properties by 80% of heat-treated samples. The formation of fine dendrite microstructure, rode like larger secondary dendrite and sound metallurgical bonded morphology played a great role. The maximum laser modified thickness of 2.23 mm was achieved.