Journal
SCRIPTA MATERIALIA
Volume 210, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2021.114423
Keywords
Short-range ordering; Al-Zn alloy; Supersaturation; Scanning transmission electron microscopy (STEM); Density functional theory (DFT)
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Funding
- Microscopy Australia node at the University of Sydney (Sydney Microscopy Microanalysis)
- Ministry of Education of the Russian Federation [0838-2020-0 006]
- Russian Foundation for Basic Research [20-03-00614]
- Australian Research Council [DP190102243]
- Sydney Informatics Hub HPC Allocation Scheme [LE190100021]
- China Scholarship Council [201506840096]
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This study reports chemical short-range ordering in an ultrafine-grained supersaturated Al-Zn alloy introduced by severe plastic deformation at room temperature, resulting in an ordered L1(0)-AlZn structure with dimensions of 1-3 nm. Vacancies introduced by severe plastic deformation are believed to play an important role in the formation of chemical short-range ordering at room temperature.
Chemical short-range ordering is an important structural feature that would significantly affect materials properties, including mechanical properties. Chemical short-range ordering has been discovered in many alloy systems and usually forms at high temperatures during the materials synthesis or thermal annealing processes. Here we report chemical short-range ordering in an ultrafine-grained supersaturated Al-Zn alloy introduced by severe plastic deformation (strain > 1) at room temperature. The chemical short-range ordering results in an ordered L1(0)-AlZn structure with the dimensions of 1-3 nm. It is believed that vacancies introduced by severe plastic deformation play an important role in the formation of the chemical short-range ordering at room temperature. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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