Interfacial Microstructure and Properties of Ti/Al Composite Plate by Wave-Flat Rolling

The finite element simulation of wave-flat rolling and flat rolling of Ti/Al composite plate was established and carried out. Effects of different rolling modes on the microstructure and mechanical properties of the composite plate were analyzed. The results show that the warpage degree of the composite plate with reduction rate of 40% is lower than that with reduction rate of 35%, the equivalent stress and strain of the wave-flat-rolled composite plate are larger than those of the flat-rolled composite 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 1.8 mu m, and that at the trough is 2.4 mu m, while the thickness of the interfacial diffusion layer of the flat-rolled composite plate is 1.6 mu m. The degree of recrystallization of the wave-flat-rolled composite 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 composite plate, but the elongation is lower due to work hardening.