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Mechanical Behavior of a Magnesium Alloy Nanocomposite Under Conditions of Static Tension and Dynamic Fatigue

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Abstract

In this paper, the intrinsic influence of nano-alumina particulate (Al2O3p) reinforcements on microstructure, microhardness, tensile properties, tensile fracture, cyclic stress-controlled fatigue, and final fracture behavior of a magnesium alloy is presented and discussed. The unreinforced magnesium alloy (AZ31) and the reinforced composite counterpart (AZ31/1.5 vol.% Al2O3) were manufactured by solidification processing followed by hot extrusion. The elastic modulus, yield strength, and tensile strength of the nanoparticle-reinforced magnesium alloy were noticeably higher than the unreinforced counterpart. The ductility, quantified by elongation-to-failure, of the composite was observably lower than the unreinforced monolithic counterpart (AZ31). The nanoparticle-reinforced composite revealed improved cyclic fatigue resistance over the entire range of maximum stress at both the tested load ratios. Under conditions of fully reversed loading (R = −1) both materials showed observable degradation in behavior quantified in terms of cyclic fatigue life. The conjoint influence of reinforcement, processing, intrinsic microstructural features and loading condition on final fracture behavior is presented and discussed.

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Acknowledgments

The authors express and extend most sincere thanks and appreciation to the two ‘unknown’ reviewers for their comments, corrections and suggestions. These have been included/incorporated and addressed in the revised manuscript and have helped add to improving the overall quality and content.

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Authors and Affiliations

  1. Division of Materials Science and Engineering, Department of Mechanical Engineering, The University of Akron, Akron, OH, 443250-3903, USA

    T. S. Srivatsan & C. Godbole

  2. Department of Geology, The University of Akron, Akron, OH, 443250-3903, USA

    T. Quick

  3. Department of Mechanical Engineering, National University of Singapore, 9, Engineering Drive 1, Singapore, 117-576, Singapore

    M. Paramsothy & M. Gupta

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  1. T. S. Srivatsan
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  2. C. Godbole
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Correspondence to T. S. Srivatsan.

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Srivatsan, T.S., Godbole, C., Quick, T. et al. Mechanical Behavior of a Magnesium Alloy Nanocomposite Under Conditions of Static Tension and Dynamic Fatigue. J. of Materi Eng and Perform 22, 439–453 (2013). https://doi.org/10.1007/s11665-012-0276-2

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  • DOI: https://doi.org/10.1007/s11665-012-0276-2

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