Characterization of the local mechanical properties of 5083-5383 MIG welded joints

Abstract

act. Due to the heat input effect, the weld seam and heat-affected zone (HAZ) are strength weakened phases in 5xxx aluminum welded joints. Therefore, the local mechanical properties of the 5xxx aluminum welded joint are worth studying for structural design. In this paper, the local mechanical properties of 5083-5383 MIG joints were studied. Through instrumented indentation and tensile tests with digital image correlation (DIC), the yield strength of the same area of the weld center, heat-affected zone, and the base metal (BM) was respectively characterized. The two methods show good consistency in the characterization of the yield strength in each region. The tensile strength of the weld zone and BM characterized by two methods also represent good consistency. The HV0.1 and HV10 Vickers hardness distribution of welded joints was studied, and the differences in the characterization of local mechanical properties of 5083-5383MIG welded joints by instrumented indentation test, tensile test with DIC and Vickers hardness are analyzed. The instrumented indentation test can be used for approximate non-destructive quantitative characterization of the local mechanical properties of 5083-5383 MIG welded joints.