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Effects of Microstructure and Processing Methods on Creep Behavior of AZ91 Magnesium Alloy

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Abstract

This review sheds light on the creep properties of AZ91 magnesium alloys with a major emphasis on the influence of microstructure on the creep resistance and underlying creep deformation mechanism based on stress exponent and activation energy. Effects of processing routes such as steel mold casting, die casting, and thixoforming are considered. Roles of a wide range of additional alloying elements such as Si, Sb, Bi, Ca, Sn, REs, and combined addition of them on the microstructure modification were investigated. The reaction between these elements and the Mg or Al in the matrix develops some thermally stable intermetallic phases which improves the creep resistance at elevated temperatures, however does not influence the creep mechanism.

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Acknowledgments

This work is financially supported by National Science Foundation through Grant DMR-0968825 and Department of Energy, Grant DE-NE0000538.

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Authors and Affiliations

  1. Institute of Materials Science, University of Connecticut, Storrs, USA

    Peiman Shahbeigi Roodposhti

  2. North Carolina State University, Raleigh, USA

    Peiman Shahbeigi Roodposhti, Apu Sarkar, Korukonda L. Murty & Ronald O. Scattergood

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  1. Peiman Shahbeigi Roodposhti
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Correspondence to Peiman Shahbeigi Roodposhti.

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Shahbeigi Roodposhti, P., Sarkar, A., Murty, K.L. et al. Effects of Microstructure and Processing Methods on Creep Behavior of AZ91 Magnesium Alloy. J. of Materi Eng and Perform 25, 3697–3709 (2016). https://doi.org/10.1007/s11665-016-2222-1

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  • DOI: https://doi.org/10.1007/s11665-016-2222-1

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