Extended Simulations of the Roll Bonding Process

Abstract

AbstractRoll bonding is a joining‐by‐forming process in which two or more layers of different metals are passed through a pair of flat rolls. Under the high pressure, a permanent bond between the metals is generated by plastic deformation. The main factors influencing this process and the creation of bond strength are the size of the surface area and the normal pressure in the interface. In order to numerically predict the bond strength the FE implementation of a contact algorithm is performed. Simultaneously, the physical mechanisms typical of plastic deformation are taken into consideration. The focus particularly lies on the micro‐mechanical modeling of strain hardening by dislocation slip. A first study is given on the effects of the chemical impurities on the dislocation density and motion.