Abstract
In the current study, we proposed a method of differential temperature rolling with electromagnetic induction heating to prepare Ti/Al composite plates in a protective atmosphere to realize the homogeneous deformation of Ti/Al bonding rolling and improve the interfacial bonding strength of the composite plates. The temperature field required for homogeneous deformation rolling of titanium and aluminum was constructed using finite element simulation by adjusting the parameters of electromagnetic induction heating, which made a temperature difference of about 632 °C between titanium and aluminum, and the temperature of each plate was relatively uniform. The induction heating experiment was designed based on the finite element simulation, and the experiment verified the accuracy of the simulation results. The effects of rolling temperature and reduction rate of homogeneous deformation and bonding strength of Ti/Al composite plates were evaluated by rolling experiments. With the increase of rolling temperature and reduction rate of titanium, when the heating temperature of the Ti plate is 750–850 °C, and the reduction rate is 30%–48%, the reduction rate of Ti plate and Al plate gradually tend to be the same. When the titanium plate and aluminum plate temperature is 850 °C and 188 °C, respectively, with a rolling reduction rate of 48%, the deformation rate of Ti plate and Al plate is 46.8% and 48.6%, respectively. Moreover, the bonding strength of the composite plate reaches 77MPa.
Highlights
Titanium, "space metal", with excellent properties such as high strength, low density, corrosion resistance, and fatigue resistance, is widely used in aerospace, military, and medical fields [1,2,3]
The heat loss of the titanium plate increases with the increase in titanium plate temperature; the warming trend of the titanium plate gradually slows down
When induction heating lasted for 24s, the temperature of the titanium plate was 850 °C, and that of the aluminum plate was 188 °C, and the deformation resistance difference between the two metals was significantly reduced
Summary
"space metal", with excellent properties such as high strength, low density, corrosion resistance, and fatigue resistance, is widely used in aerospace, military, and medical fields [1,2,3]. Aluminum has a broad application in various industrial fields due to its optimum electrical and thermal conductivity, corrosion resistance, and low price [4]. The main preparation methods of Ti/Al composite plate include explosive welding [9], solid-liquid cast-roll bonding [10] and roll bonding, etc. Huang [10] prepared Ti/Al composite plates by solid-liquid cast-rolling bonding and analyzed the mechanical properties and interfacial microstructure. Compared with explosive welding and solid-liquid cast-rolling bonding, roll bonding has many advantages, including high dimensional accuracy of the product, uniform thickness of each plate of composite material, uniformity and consistent properties of composite material, high production continuity, which is conducive to the realization of mass production and automation [13, 14]
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