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Effects of the Formation of Al x Cu y Gradient Interfaces on Mechanical Property of Steel/Al Laminated Sheets by Introducing Cu Binding-Sheets

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Abstract

Steel/Cu/Al laminated sheets were fabricated by two-pass hot rolling to improve the mechanical properties of steel/Al sheets. The bonding properties and deformability of the steel/Cu/Al sheets were studied. Steel/Al and steel/Cu/Al samples were rolled at 350°C for 15 min with the first-pass reduction of 40%, and then heated at 600°C for 5 min with different reductions. It was found that the steel/Cu/Al samples rolled by the second-pass reduction of 85% could endure the maximum 90° bend cycle times of 45, exhibiting excellent fatigue resistance as well as deformability. The steel/Al samples could only reach the maximum 90° bend cycle times of 20. Furthermore, the scanning electron microscope, energy-dispersive spectrometer, and electron backscattered diffraction results showed that the preferred growth orientations of Cu, Al4Cu9, and Al2Cu on the steel/Cu/Al laminated sheets are {−1, 1, 2} 〈1, −1, 1〉, {1, 0, 0} 〈0, 1, 0〉 and {−1, 1, 2} 〈1, −1, 1〉 {1, 1, 0} 〈0, 0, 1〉. The orientation relationships between Cu and Al2Cu are {1, 1, 0}(fcc)//{1, 1, 0}(bct) and {1, 1, 1}(fcc)//{1, 1, 1}(bct). The improved bonding property and excellent fatigue resistance as well as deformability were mainly ascribed to the tight combination and consistent deformability across steel, Al, and the transition layers (Cu, Al4Cu9, and Al2Cu).

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant No. 51201112), the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20121402120004), Natural Science Foundation of Shanxi (Grant Nos. 2013021013-3 and 2012011021-2).

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Authors and Affiliations

  1. College of Material Science and Engineering, Taiyuan University of Technology, Taiyuan, People’s Republic of China

    Aili Wei, Xinghai Liu, Quanxin Shi & Wei Liang

  2. Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan, People’s Republic of China

    Wei Liang

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  1. Aili Wei
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  2. Xinghai Liu
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  3. Quanxin Shi
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  4. Wei Liang
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Correspondence to Wei Liang.

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Wei, A., Liu, X., Shi, Q. et al. Effects of the Formation of Al x Cu y Gradient Interfaces on Mechanical Property of Steel/Al Laminated Sheets by Introducing Cu Binding-Sheets. JOM 67, 1436–1442 (2015). https://doi.org/10.1007/s11837-015-1398-4

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  • DOI: https://doi.org/10.1007/s11837-015-1398-4

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