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Interfacial microstructure and mechanical properties of Al alloy /Mg alloy laminated composite plates fabricated by equal channel angular processing

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Abstract

KAl (7075) alloy /Mg (AZ31) alloy laminated composite plates were successfully fabricated by the equal channel angular processing (ECAP) by using route A for 1, 2, and 3 passes at 573 K, respectively. After fabrication, the 1-pass ECAPed laminated composite plates were annealed at different temperatures. The microstructure evolution, phase constituent, and bonding strength near the joining interface of Al (7075) alloy /Mg (AZ31) alloy laminated composites plates were evaluated with scanning electron microscopy, X-ray diffraction, and shear tests. The experimental results indicated that a 20 μm diffusion layer was observed at the joining interface of Al (7075) alloy /Mg (AZ31) alloy laminated composites plates fabricated by the 1-pass ECAP, which mainly included Al3Mg2 and Mg17Al12 phases. With the increase of passes, the increase of diffusion layer thickness was not obvious and the form of crack in these processes led to the decrease of bonding strength. For 1-pass ECAPed composites, the thickness of diffusion layer remained unchanged after annealed at 473 K, while the bonding strength reached its maximum value 29.12 MPa. However, after elevating heat treatment temperature to 573 K, the thickness of diffusion layer increased rapidly, and thus the bonding strength decreased.

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Authors and Affiliations

  1. College of Mining Technology, Taiyuan University of Technology, Taiyuan, 030024, China

    Guorui Li  (李国瑞), Dong Zhao & Yaojiang Zhao

  2. Shanxi Key Laboratory of Advanced Magnesium based Materials,College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China

    Bin Zhou & Hongxia Wang  (王红霞)

Authors
  1. Guorui Li  (李国瑞)
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  2. Dong Zhao
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  3. Yaojiang Zhao
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  4. Bin Zhou
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  5. Hongxia Wang  (王红霞)
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Corresponding author

Correspondence to Hongxia Wang  (王红霞).

Additional information

Funded by the National Natural Science Foundations of China(No.51301118), the Projects of International Cooperation in Shanxi(2014081002), and the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (2013108)

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Li, G., Zhao, D., Zhao, Y. et al. Interfacial microstructure and mechanical properties of Al alloy /Mg alloy laminated composite plates fabricated by equal channel angular processing. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 417–421 (2016). https://doi.org/10.1007/s11595-016-1385-9

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  • DOI: https://doi.org/10.1007/s11595-016-1385-9

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