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Fracture Behavior and Grain Boundary Sliding During High-Temperature Low-Stress Deformation of AZ31 Magnesium Alloy

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Mechanical and Creep Behavior of Advanced Materials

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

Low-stress high-temperature tensile-creep behavior of AZ31 Mg alloy was investigated to characterize microstructure evolution, uncover dominant creep mechanism and find a correlation with common creep models. The stress exponent, inverse grain size exponent and activation energy value were evaluated. Cavity nucleation from stress concentration sites, types of fracture surfaces and microstructural evidence of grain migrations were observed in crept samples that are indicative of Rachinger mechanism of grain boundary sliding (GBS). Experimental data reveal a reasonable correlation with Langdon’s model. Further analysis on fracture behavior of this alloy in a wider range of stresses show that they follow Monkman-Grant model in predicting the fracture time.

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Acknowledgements

This research is supported by the National Science Foundation, Grant 0968825.

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Authors and Affiliations

  1. University of Connecticut, Storrs, CT, 06269, USA

    Peiman Shahbeigi Roodposhti

  2. North Carolina State University, Raleigh, NC, 27695, USA

    Peiman Shahbeigi Roodposhti & Korukonda L. Murty

Authors
  1. Peiman Shahbeigi Roodposhti
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  2. Korukonda L. Murty
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Corresponding author

Correspondence to Peiman Shahbeigi Roodposhti .

Editor information

Editors and Affiliations

  1. Dept of Chemical and Matls Engrg, University of Idaho Dept of Chemical and Matls Engrg, Moscow, Idaho, USA

    Indrajit Charit

  2. North Carolina State University , Raleigh, North Carolina, USA

    Yuntian T. Zhu

  3. Los Alamos National Laboratory , Los Alamos, New Mexico, USA

    Stuart A. Maloy

  4. University of Tennessee at Knoxville , KNOXVILLE, Tennessee, USA

    Peter K. Liaw

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Roodposhti, P.S., Murty, K.L. (2017). Fracture Behavior and Grain Boundary Sliding During High-Temperature Low-Stress Deformation of AZ31 Magnesium Alloy. In: Charit, I., Zhu, Y., Maloy, S., Liaw, P. (eds) Mechanical and Creep Behavior of Advanced Materials. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51097-2_23

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