Parameter free quantitative analysis of atom probe data by correlation functions: Application to the precipitation in Al-Zn-Mg-Cu

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 approache...

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Bibliographic Details
Published inScripta materialia Vol. 154; pp. 106 - 110
Main Authors Zhao, Huan, Gault, Baptiste, Ponge, Dirk, Raabe, Dierk, De Geuser, Frédéric
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2018
Elsevier
Subjects
Al-Zn-Mg-(Cu) alloy
Atom probe tomography
Condensed Matter
Materials Science
Pair-correlation function
Physics
Precipitation hardening
Small-angle scattering
Pair-correlation function
Al-Zn-Mg-(Cu) alloy
Small-angle scattering
Precipitation hardening
Atom probe tomography
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Summary: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. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2018.05.024