Title

Investigation on bonding strength of steel/aluminum clad sheet processed by horizontal twin-roll casting, annealing and cold rolling

RIS ID

109802

Publication Details

Chen, G., Li, J. T., Yu, H. L., Su, L. H., Xu, G. M., Pan, J. S., You, T., Zhang, G., Sun, K. M. & He, L. Z. (2016). Investigation on bonding strength of steel/aluminum clad sheet processed by horizontal twin-roll casting, annealing and cold rolling. Materials and Design, 112 263-274.

Abstract

In this work, a stainless steel/aluminum clad sheet was produced successfully by horizontal twin-roll casting. The interface morphology, element distribution and bonding strength of the clad sheets after different annealing and cold rolling processes were investigated using optical microscopy, electron probe micro-analyzer and T-type peel test. The surfaces of the steel and aluminum sheets after peeling were studied using scanning electron microscopy. In the as-cast clad sheet, a 3 μm thick diffusional layer exists at the Fe/Al interface. The average peel strength is 12 N/mm. Suitable annealing treatment can greatly improve the bonding quality of the interface. The average peel strength increases with increasing annealing temperature, from 12 N/mm at 450 °C to 21 N/mm at 510 °C. After annealing at 540 °C, the diffusional layer becomes almost three times the original thickness, which results in a sharp drop in the average peel strength to 5 N/mm. Cold rolling processing also improves the bonding strength of the clad sheets. The average peel strength of the clad sheet annealed at 510 °C increases as the reduction in thickness by cold rolling increases, from 23 N/mm for 25% reduction, to 28 N/mm for 40% reduction.

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.matdes.2016.09.061