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Compositional evolution of long-period stacking ordered structures in magnesium studied by atom probe tomography

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Kim,  Jin-Kyung
Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Department of Energy Science, Sungkyunkwan University, Suwon 16419, South Korea;

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Guo,  Wei
Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Material Science Research and Development, Timken World Headquarters, North Canton, OH, USA;

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Choi,  Pyuck-Pa
Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea;

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Raabe,  Dierk
Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Kim, J.-K., Guo, W., Choi, P.-P., & Raabe, D. (2018). Compositional evolution of long-period stacking ordered structures in magnesium studied by atom probe tomography. Scripta Materialia, 156, 55-59. doi:10.1016/j.scriptamat.2018.07.017.


Cite as: http://hdl.handle.net/21.11116/0000-0001-E67A-3
Abstract
Mg alloys containing long-period stacking ordered (LPSO) structures are strong and ductile compared to conventional Mg alloys. We study here the compositional evolution of LPSO structures in a Mg97Y2Zn1 (at.) alloy upon annealing at 500 °C using atom probe tomography. In the material annealed for 2.5 h, the Zn/Y ratio of the building blocks in the interdendritic LPSO phase (0.73) is close to the stoichiometric composition of Y8Zn6 L12 clusters while that in plate-type LPSO structures (0.66) slightly deviates from the ideal value. The Y/Zn enrichment in LPSO structures in the α-Mg matrix slightly decreases with increasing annealing time. © 2018 Elsevier Ltd