Mechanical Properties and Interfacial Structure of Ti/Al Clad Plates Generated by Differential Temperature Rolling

Abstract

In this study, a Ti/Al clad plate was prepared by differential temperature rolling, where only the titanium layer is heated. The effects of the rolling reduction and Ti layer heating temperature on the shear strength and interface of Ti/Al clad plates were investigated. The results indicate that when the titanium layer was heated to 800° and the rolling reduction was 50%, the shear strength of the titanium/aluminum clad plates interface reached 107.5 MPa, which is close to the shear strength of aluminum matrix, and the fracture surface presented ductile fracture characteristics. During the heating process, an oxide layer was produced on the surface of the titanium plates. However, the oxide layer was completely broken with a large rolling reduction, and then, aluminum metal extruded into the cracks and made contact with fresh titanium metal. Under the action of high pressure and high temperature, Ti and Al atoms mutually diffuse so that the Ti/Al clad plates achieved a strong metallurgical bond.