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On Rotation Contour Contrast in Hot-Compressed Magnesium Alloys in a Scanning Electron Microscope

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Abstract

Two types of electron channeling contrast were observed in backscattered electron micrographs of deformed Mg–0.3Al–0.2Ca (wt%) alloy after the uniaxial hot-compression tests in a scanning electron microscope (SEM). The effects of SEM operation conditions namely, stage tilt and electron beam energy on each type of contrast were investigated. The electron backscattered diffraction crystallographic orientation mapping was used to map the local crystal orientation across the grains. The observed contrast was described as rotation contour contrast (RCC) and found to have crystallographic origin. The appearance of RCC was attributed to the local rotation of the crystal during the deformation of the grain.

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Acknowledgments

The authors would like to thank Dr. Stefan Zaefferer at Max-Planck Institute for Metals Research (MPIE) in Dusseldorf, Germany for their technical assistance and constructive contribution to this research.

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Authors and Affiliations

  1. Department of Geosciences and High Pressure Science and Engineering Center, University of Nevada, Las Vegas (UNLV), Las Vegas, NV, 89154, USA

    Shirin Kaboli

  2. Department of Mining and Materials Engineering, McGill University, Montreal, QC, H3A 0C5, Canada

    Raynald Gauvin

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  1. Shirin Kaboli
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  2. Raynald Gauvin
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Correspondence to Shirin Kaboli.

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Kaboli, S., Gauvin, R. On Rotation Contour Contrast in Hot-Compressed Magnesium Alloys in a Scanning Electron Microscope. Metallogr. Microstruct. Anal. 5, 188–195 (2016). https://doi.org/10.1007/s13632-016-0275-z

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  • DOI: https://doi.org/10.1007/s13632-016-0275-z

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