Investigation on interface bonding behaviour of thin aluminium clad steel strip

Abstract

Bonding behaviour with different rolling reductions was discussed by peeling test in order to determine critical reduction of thin aluminium clad steel strip bonded by cold rolling. The morphology and element distribution at the interface were observed and analysed using scanning electron microscope and energy dispersive spectrometer method, respectively. The initial bond reduction of 15–25% was suggested and the minimum reduction of 35–37% was determined based on the peel force data. At the reduction of 35%, normal stress per unit bonded length is calculated as about 3.1 N/mm, and effective peeling length of 0.035 mm is determined through the theoretical analysis, which can be used to calculate the interface bond strength by peeling test.