title: Quantitative chemical-structure evaluation using atom probe tomography: Short-range order analysis of Fe-Al.
abstract: Short-range-order (SRO) has been quantitatively evaluated in an Fe-18Al (at%) alloy using atom probe tomography (APT) data and by calculation of the generalised multicomponent short-range order (GM-SRO) parameters, which have been determined by shell-based analysis of the three-dimensional atomic positions. The accuracy of this method with respect to limited detector efficiency and spatial resolution is tested against simulated D03 ordered data. Whilst there is minimal adverse effect from limited atom probe instrument detector efficiency, the combination of this with imperfect spatial resolution has the effect of making the data appear more randomised. The value of lattice rectification of the experimental APT data prior to GM-SRO analysis is demonstrated through improved information sensitivity.
authors.affiliation: Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia; Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany. Electronic address: r.marceau@deakin.edu.au.
authors.forename: R K W
authors.initials: RK
authors.lastname: Marceau
authors.affiliation: Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia; School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia.
authors.forename: A V
authors.initials: AV
authors.lastname: Ceguerra
authors.affiliation: Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia; School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia.
authors.forename: A J
authors.initials: AJ
authors.lastname: Breen
authors.affiliation: Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Raabe
authors.affiliation: Australian Centre for Microscopy and Microanalysis, The University of Sydney, NSW 2006, Australia; School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia.
authors.forename: S P
authors.initials: SP
authors.lastname: Ringer
keywords: Atom probe tomography; Intermetallics (iron-aluminides); Short-range ordering