Preparation and properties for Ti/Al clad plates generated by differential temperature rolling

In this study, a Ti/Al clad plate was prepared by differential temperature rolling, where only the titanium layer was heated. The effects of the rolling reduction and Ti layer heating temperature on the shear strength, interface and distribution of thickness ratios of Ti/Al clad plates were investigated. The results indicate that when the titanium layer was heated to 800 degrees C and the rolling reduction was 50%, the shear strength of the titanium/aluminum clad plates interface reached 108 MPa, which was close to the shear strength of aluminum matrix (126 MPa), and the fracture surface presented ductile fracture characteristics. During the heating process, an oxide layer was generated on the surface of the titanium plates. However, this oxide layer was broken in large area with a large rolling reduction, and then, aluminum metal extruded into the cracks and made contact with fresh titanium metal. The Ti/Al clad plates achieved a strong metallurgical bond under the action of high pressure and high temperature. With increased heating temperature of the titanium layer and with increased total rolling reduction, the deformation of Ti and Al became more homogeneous reaching almost the same thickness reduction. The deformations of the Al and Ti layers were up to 51.4% and 48.6% for a 50% reduction at 800 degrees C.