Journal
SCRIPTA MATERIALIA
Volume 154, Issue -, Pages 106-110Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.05.024
Keywords
Al-Zn-Mg-(Cu) alloy; Precipitation hardening; Atom probe tomography; Small-angle scattering; Pair-correlation function
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Funding
- Chinese Scholarship Council
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Atom probe tomography enables precise quantification of the composition of second phase particles from their early stages, leading to improved understanding of the thermodynamic and kinetic mechanisms of phase formation and quantify structure-property relationships. Here we demonstrate how approaches developed for small angle scattering can be adapted to atom probe tomography. By exploiting nearest-neighbor distributions and radial distribution function, we introduce a parameter free methodology to efficiently extract information such as particle size, composition, volume fraction, number density and inter-particle distance. We demonstrate the strength of this approach in the analysis of a precipitation-hardened model Al-Zn-Mg-Cu high-strength lightweight alloy. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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