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Improvement in Tensile and Wear Properties of As-Cast Al–15%Mg2Si Composite Modified by Zn and Ni

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Abstract

The effects of different amounts of Zn and Ni on the microstructure, tensile and wear properties of as-cast in situ Al–15wt%Mg2Si composite have been investigated. Microstructural examinations were assessed by the use of optical microscope, scanning electron microscope (SEM) and energy-dispersive spectroscopy. The results showed that the additions of 5 wt% Zn and 0.5 wt% Ni to the composite refine the microstructure and enhance the ultimate tensile strength (UTS) value from 210 to 290 MPa and elongation values of the material from 2.0 to 5.2%. The presence of fine dimples and cracked particles on the fracture surfaces of Ni-added specimens revealed that ductile mode of fracture is dominant. It was found that the amount of weight loss during dry sliding wear test on Al–15wt%Mg2Si composite reduces from 3 mg to 0.9 mg after adding 5 wt% Zn and 0.5 wt% Ni to the composite.

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Acknowledgements

The authors gratefully acknowledge University of Tehran for laboratory facilities and financial support of this work and also Mr. Najafi for help in experimental works.

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Authors and Affiliations

  1. School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran, Iran

    M. Emamy, K. Tavighi & B. Pourbahari

  2. Department of Materials Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran

    A. B. Eradi-Zare

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  1. M. Emamy
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  2. A. B. Eradi-Zare
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  3. K. Tavighi
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  4. B. Pourbahari
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Correspondence to M. Emamy.

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Emamy, M., Eradi-Zare, A.B., Tavighi, K. et al. Improvement in Tensile and Wear Properties of As-Cast Al–15%Mg2Si Composite Modified by Zn and Ni. Inter Metalcast 11, 790–801 (2017). https://doi.org/10.1007/s40962-016-0125-4

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  • DOI: https://doi.org/10.1007/s40962-016-0125-4

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