Evaluation on Interface Bonding of Thin Aluminum Clad Steel Strip

Abstract

The bond strength were comparatively measured by tensile test, tension shear test and compression shear test in order to evaluate bonding behavior of thin aluminum clad steel strips bonded by cold rolling, and furthermore determine minimum stable reduction of clad strips. The morphologies after fracture were observed and analyzed using SEM (scanning electron microscope) and EDS (energy dispersive spectrometer). The results show that it is lower for the bond strength obtained by shear test than one obtained by tensile test, which largely attributes to different stress states during testing. Minimum stable reduction can be defined as one beyond which the fracture would completely occur at aluminum component layer instead of interface between components, which is suggested as 40-45% based on fracture feature of Al clad steel strip.