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Room-temperature-deformation-induced chemical short-range ordering in a supersaturated ultrafine-grained Al-Zn alloy
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DOI：10.1016/j.scriptamat.2021.114423.png)
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Abstract
En 中文
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.
Keywords:
Short-range ordering
Al-Zn alloy
Supersaturation
Scanning transmission electron microscopy (STEM)
Density functional theory (DFT)
Journal
IF:
5.6
Papers:
1.6W
Citations:
5.1W