Effects of Alloying Element Cu and Rare Earth La on Properties of Aluminum Alloys
1 CT The effects of alloying element Cu and rare earth La on the performance of aluminum alloy die castings were mainly studied. Through comparative analysis of the experimental hardness, tensile strength, elongation data and fracture morphology of each group, it was found that aluminum alloys with 1.98% Cu and 0.32% La elements added at the same time had the best mechanical properties compared to the original base materials. Hardness, tensile strength and elongation increased by 61.2%, 51.5% and 63.9%, respectively, and the quality of aluminum alloys increased significantly.