Effect of rolling on microstructure and properties of explosive welding TA1/5052 and TA1/1060/5052 composite plates
TA 1/5052 composite plate composed of pure titanium TA1 and 5052 aluminum alloy and TA 1/1060/5052 composite plate with an intermediate layer of pure aluminum 1060 were prepared by explosive welding method.The effect of rolling on microstructure and properties of the explosive welding TA1/5052 and TA1/1060/5052 composite plates was studied,and the effect of intermediate layer addition on the interface of the composite plates was studied too.The results show that the interface bonding between explosive welding TA1/5052 and TA1/1060/5052 composite plates is good,and the microstructure of the interface after annealing is mainly α-Ti,α-Al and TiAl3 intermetallic compound.The composite plates have a significant improvement in hardness compared to the original titanium and aluminum plates,while also exhibit good tensile and bending properties,and no delamination occurs during the mechanical property testing.After rolling,due to the effect of rolling pressure,the thickness of the diffusion layer of the composite plates decreases,the microstructure changes,the grains near the interface are extruded and deformed,and gradually elongate during the feeding process,presenting a fibrous structure.In addition,strong work hardening occurs during the rolling process,leading to an increase in the tensile strength and microhardness of the composite plates.Adding an intermediate layer can significantly improve the interface morphology of the composite plates and inhibit the formation of Ti/Al intermetallic compounds at the interface.
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