Fabrication of Mg-Sn-Y/Al6061 Composite Plates by Asymmetrical Rolling with Differential Temperatures and their Microstructures and Mechanical Properties.

Mg/Al composites were successfully fabricated by the differential temperature + asymmetrical rolling (DTAR) and the isothermal + symmetrical rolling (ISR), respectively. The effects of DTAR and ISR on the tensile properties, bonding strength, interface morphology, and microstructure of composite plates were investigated. The results indicated that grains near the Mg layer of the Mg/Al interface were fine and equiaxed because of the occurrence of dynamic recrystallization on the Mg layer. In contrast, the grains at the center and near the Al side interface were elongated. DTAR enhanced the recrystallization degree of Mg side grains. The tensile properties and bonding strength of the composite plates increased gradually with increase in reduction rate, while the interface morphology was gradually flat with increase in reduction rate. The ultimate tensile strength of DTAR sample reaches 205 MPa, which is 25% higher than that of ISR sample. [ABSTRACT FROM AUTHOR]