Study on Microstructure and Properties of Magnesium Base Composite Cladding Sheet

The magnesium base composite cladding sheet was prepared by rolling method.After rolling and annealing, the size of Mg/Al (LA103Z/6013-T4)composite sheet was 0.87 mm/200 mm×630 mm.At the edge of the composite sheet, there was 10-15mm edge crack.And the other areas were well combined, without crack, unbound, bulge or other defects.The interface of LA103Z/6013-T4 was examined by OM and SEM, and the strength and bonding of the composite sheet were inspected by tensile test and shearing test.The tests results show that the interface between LA103Z and 6013-T4 is uniform without unbound, crack, melting block or other defects.The line scan spectra of Al and Mg elements shows"X"shape, which indicates that the interface elements diffuse.The tensile test results show that the yield strength of the composite is 243 MPa, the tensile strength is 273 MPa, and the elongation is 5%.It indicates that the composite sheet shows high strength.The shear test results show that the bonding strength of the composite sheet is more than 59 MPa.The results show that the LA103Z/6013-T4 composite sheet has excellent strength and bonding quality, and can be used in engineering.