Effects of Sc Contents on Microstructure and Mechanical Properties of 6061/AZ31B Composite Plate
Taking AZ31B as substrates and 6061 liquid metals with different Sc contents(0,0.1％,0.2％,0.3％,0.4％)as casting materials,6061/AZ31B composite plate was solid-liquid rolled.The microstructure and phase com-positions of alloys were analyzed by OM、SEM and XRD,and mechanical properties were tested.The results indicate that the thicknesses of bonding interface of composite plates with different Sc contents have little change,which are all about 5 μm,while grains are significant refined.The refinement effect is optimal with Sc content of 0.2％,and compos-ite plates exhibit desirable mechanical properties,where the tensile strength and shear strength reach peak values of 234.841 MPa and 70.032 MPa,respectively,which is 22.0％and 69.3％higher than those of ones without Sc addition.
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