Phase decomposition and ordering in Ni-11.3 at.% Ti studied with atom probe tomography

Handle URI:
http://hdl.handle.net/10754/563723
Title:
Phase decomposition and ordering in Ni-11.3 at.% Ti studied with atom probe tomography
Authors:
Al-Kassab, Talaat; Kompatscher, Michael; Kirchheim, Reiner; Kostorz, Gernot; Schönfeld, Bernd
Abstract:
The decomposition behavior of Ni-rich Ni-Ti was reassessed using Tomographic Atom Probe (TAP) and Laser Assisted Wide Angle Tomographic Atom Probe. Single crystalline specimens of Ni-11.3at.% Ti were investigated, the states selected from the decomposition path were the metastable γ″ and γ' states introduced on the basis of small-angle neutron scattering (SANS) and the two-phase model for evaluation. The composition values of the precipitates in these states could not be confirmed by APT data as the interface of the ordered precipitates may not be neglected. The present results rather suggest to apply a three-phase model for the interpretation of SANS measurements, in which the width of the interface remains nearly unchanged and the L12 structure close to 3:1 stoichiometry is maintained in the core of the precipitates from the γ″ to the γ' state. © 2014 Elsevier Ltd.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program
Publisher:
Elsevier BV
Journal:
Micron
Issue Date:
Sep-2014
DOI:
10.1016/j.micron.2014.04.004
Type:
Article
ISSN:
09684328
Sponsors:
The authors are grateful to Erwin Fischer for growing the single crystals. This research was supported in part by the Swiss National Science Foundation. T. Al-Kassab would like to appreciate the generous base line funding support by KAUST.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorAl-Kassab, Talaaten
dc.contributor.authorKompatscher, Michaelen
dc.contributor.authorKirchheim, Reineren
dc.contributor.authorKostorz, Gernoten
dc.contributor.authorSchönfeld, Bernden
dc.date.accessioned2015-08-03T12:07:49Zen
dc.date.available2015-08-03T12:07:49Zen
dc.date.issued2014-09en
dc.identifier.issn09684328en
dc.identifier.doi10.1016/j.micron.2014.04.004en
dc.identifier.urihttp://hdl.handle.net/10754/563723en
dc.description.abstractThe decomposition behavior of Ni-rich Ni-Ti was reassessed using Tomographic Atom Probe (TAP) and Laser Assisted Wide Angle Tomographic Atom Probe. Single crystalline specimens of Ni-11.3at.% Ti were investigated, the states selected from the decomposition path were the metastable γ″ and γ' states introduced on the basis of small-angle neutron scattering (SANS) and the two-phase model for evaluation. The composition values of the precipitates in these states could not be confirmed by APT data as the interface of the ordered precipitates may not be neglected. The present results rather suggest to apply a three-phase model for the interpretation of SANS measurements, in which the width of the interface remains nearly unchanged and the L12 structure close to 3:1 stoichiometry is maintained in the core of the precipitates from the γ″ to the γ' state. © 2014 Elsevier Ltd.en
dc.description.sponsorshipThe authors are grateful to Erwin Fischer for growing the single crystals. This research was supported in part by the Swiss National Science Foundation. T. Al-Kassab would like to appreciate the generous base line funding support by KAUST.en
dc.publisherElsevier BVen
dc.subjectAtom probe tomographyen
dc.subjectNi-Ti alloysen
dc.subjectPhase transformationen
dc.subjectPrecipitate-matrix interfaceen
dc.titlePhase decomposition and ordering in Ni-11.3 at.% Ti studied with atom probe tomographyen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalMicronen
dc.contributor.institutionMisapor AG, 7302 Landquart, Switzerlanden
dc.contributor.institutionInstitut für Materialphysik, Georg-August Universität, 37077 Göttingen, Germanyen
dc.contributor.institutionDepartment of Physics, ETH Zurich, 8093 Zurich, Switzerlanden
dc.contributor.institutionLaboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerlanden
kaust.authorAl-Kassab, Talaaten
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