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Creep Deformation Mechanisms and Related Microstucture Development of AZ31 Magnesium Alloy

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Abstract

Because of ever increasing demanded of Magnesium alloys in various industries, high temperature deformation of Mg-Al-Zn alloys (AZ31) at constant stress (i.e. creep) were studied at a wide range of stresses and temperatures to characterize underlying deformation mechanism and dynamic recrystallization (DRX) Various microstructures (e.g. grain growth & DRX) are noted during steady-state creep mechanisms such as grain boundary sliding (GBS), dislocation glide creep (DGC) and dislocation climb creep (DCC). Although a combination of DRX and grain growth is characteristic of low stacking fault energy materials like Mg alloys at elevated temperatures, observation reveals grain growth at low strain-rates (GBS region) along with dynamic recovery (DRV) mechanism. Scanning Electron Microscopic (SEM) characterization of the fracture surface reveals more inter-granular fracture for large grains (i.e. GBS region with DRV process) and more dimple shape fracture for small grains (i.e. DGC & DCC region with DRX).

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Author information

Authors and Affiliations

  1. North Carolina State University Mater. Sci. Eng. Department, 911 Partner Way, 3035 EB1, Raleigh, NC, 27606-7907, USA

    Peiman Shahbeigi Roodposhti

  2. 3143 Burlington Engineering Labs, North Carolina State University, 2500 Stinson Drive, Raleigh, NC, 27606-7909, USA

    Apu Sarkar & Korukonda Linga Murty

Authors
  1. Peiman Shahbeigi Roodposhti
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  2. Apu Sarkar
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  3. Korukonda Linga Murty
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Editor information

Editors and Affiliations

  1. Department of Materials Science and Engineering, University of Florida, USA

    Michele V. Manuel Ph.D., B.S. (associate professor) (associate professor)

  2. Structural Materials Unit, National Institute for Materials Science, Tsukuba, Japan

    Alok Singh Ph.D. (Chief Researcher) (Chief Researcher)

  3. Magnesium Elektron Group Worldwide, USA

    Martyn Alderman (Divisional Director of Technology) (Divisional Director of Technology)

  4. IND LLC, USA

    Neale R. Neelameggham (‘The Guru’) (‘The Guru’)

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© 2015 TMS (The Minerals, Metals & Materials Society)

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Roodposhti, P.S., Sarkar, A., Murty, K.L. (2015). Creep Deformation Mechanisms and Related Microstucture Development of AZ31 Magnesium Alloy. In: Manuel, M.V., Singh, A., Alderman, M., Neelameggham, N.R. (eds) Magnesium Technology 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-48185-2_9

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