Bonding strength of Al/Mg/Al alloy tri-metallic laminates fabricated by hot rolling |
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Authors: | X P Zhang M J Tan T H Yang X J Xu J T Wang |
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Affiliation: | (1) Department of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, People’s Republic of China |
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Abstract: | One of major drawbacks of magnesium alloy is its low corrosion resistance, which can be improved by using an aluminized coating.
In this paper, 7075 Al/Mg-12Gd-3Y-0·5Zr/7075 Al laminated composites were produced by a hot roll bonding method. The rolling
temperature was determined based on the flow stresses of Mg-12Gd-3Y-0·5Zr magnesium alloy and 7075 Al alloy at elevated temperature.
The bonding strength of the laminate composites and their mechanism were studied. The effects of the reduction ratio (single
pass), the rolling temperature, and the subsequent annealing on the bonding strength were also investigated. It was observed
that the bonding strength increased rapidly with the reduction ratio and slightly with the rolling temperature. The bonding
strength increases with the annealing time until the annealing time reaches 2 h and then decreases. The mechanical bond plays
a major role in the bonding strength. |
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Keywords: | |
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