Investigation of the rupture of Ti/Steel laminated composite with soft interlayers

Abstract

The study presents experimental investigations of the contact hardening effect of thin Cu and Nb interlayers in laminated Ti/Steel composites. The four layer Ti-Cu-Nb-Steel with various Nb and Cu interlayer thickness values was obtained via explosion welding and subsequently heat treated at 600°C for 1.5 hr. The evolution of the microstructure of the interfaces between bonded metals before and after heat treatment was studied during composites tensile loading. FEM simulation was carried out to determine the critical value of the relative interlayer thickness at which the composite tensile strength in transverse to the bond interface direction is higher than of Cu.