Acta Metallurgica Sinica (English Letters)

, Volume 32, Issue 1, pp 31–40 | Cite as

Strength and Wear Behavior of Mg Alloy AE42 Reinforced with Carbon Short Fibers

  • Sabbah AtayaEmail author
  • Naser A. Alsaleh
  • Mohamed M. El-Sayed Seleman


In addition to the advantage of the lightweight of magnesium alloys, magnesium composites have moderate strength and elastic modulus. The proposed application of magnesium composites as diesel truck pistons makes it necessary to assess their wear performance. Little research data have been discussed on wear behavior of Mg alloy AE42 matrix and its composites. Thus, this paper reports wear behavior of magnesium alloy AE42 (Mg–Al–Mn—RE; rare earth) and its composite AE42-C, which contains 23 vol% of randomly oriented carbon short fibers. Materials characterization, including density measurements, hardness testing, microstructures investigation, and compression testing at temperatures of 25, 150, and 300 °C, were conducted. Wear tests were performed under various loads and sliding distances. Wear mechanisms were also proposed based on the examination of worn surfaces using optical microscopy and scanning electron microscopy equipped with EDX (energy-dispersive X-ray spectrometry) analysis system. The hardness of AE42-23 vol% C composite is twice the hardness of the Mg matrix alloy AE42. Significant improvements to yield stress and compressive strength at temperatures of 25, 150, and 300 °C of the composite versus the AE42 alloy are achieved. Wear resistance of the composite is improved considerably versus that of the Mg alloy AE42 at the various sliding distances. Smearing of graphite on the worn surface produces a lubricating film that delays change from mild to severe wear of the composite, especially at high loads. EDX analysis of the worn surface shows oxidation of the matrix alloy at higher wear loads, and this mechanism decreases in the presence of carbon fibers under the same loads. Abrasive wear, oxidation, and plastic deformation are the dominant wear mechanisms for the alloy matrix AE42, whereas mainly abrasive wear is the wear mechanism of AE42-23 vol% C composite under the proposed testing conditions.


Magnesium composites Carbon short fibers Compressive strength Wear resistance Wear mechanisms 



The authors thank Dr. S. Mielke (Kolbenschmidt Company, Neckarsulm Germany) for helping with production of the materials under study.


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Copyright information

© The Chinese Society for Metals and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Sabbah Ataya
    • 1
    • 2
    Email author
  • Naser A. Alsaleh
    • 2
  • Mohamed M. El-Sayed Seleman
    • 1
  1. 1.Metallurgical and Materials Engineering Department, Faculty of Petroleum and Mining EngineeringSuez UniversitySuezEgypt
  2. 2.Department of Mechanical Engineering, College of EngineeringAl Imam Mohammad Ibn Saud UniversityRiyadhSaudi Arabia

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