Study on Interfacial Microstructure and Properties of Ti/Al Composite Plate by Wave-flat Rolling

Abstract:

The finite element simulation of wave-flat rolling and flat rolling of Ti/Al composite plate was established and experiments were carried out to analyze the effects of different rolling modes on the microstructure and mechanical properties of the composite plate.The results show that the warpage degree of the clad plate is lower than that of 35% when the reduction rate of the clad plate is 40%, the equivalent stress and strain of the wave-flat-rolled clad plate are larger than those of the flat-rolled clad plate, and no holes and cracks are found in the bonding interface.The thickness of the interfacial diffusion layer at the crest of the wave is 1.8μm, and that at the trough is 2.4μm, while the thickness of the interfacial diffusion layer of the flat-rolled clad plate is 1.6μm.The degree of recrystallization of the wave-flat-rolled clad plate Al plate is higher than that of flat-rolling, and its tensile strength, bending resistance, and hardness are also higher than those of the flat-rolled clad plate, but the elongation is lower due to work hardening.

Key words:Ti/Al composite plate; finite element simulation; wave-flat rolling; mechanical properties