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Solid solution decomposition and Guinier-Preston zone formation in Al-Cu alloys: A kinetic theory with anisotropic interactions
Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia.;State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia..
KTH. Inst Quantum Mat Sci, Ekaterinburg 620072, Russia.;Nosov Magnitogorsk State Tech Univ, Magnitogorsk 455000, Russia..ORCID iD: 0000-0001-8629-5193
Inst Quantum Mat Sci, Ekaterinburg 620072, Russia.;RAS, Inst Met Phys, Ural Div, Ekaterinburg 620219, Russia.;Ural Fed Univ, Ekaterinburg 620002, Russia..
KTH.
2018 (English)In: PHYSICAL REVIEW MATERIALS, ISSN 2475-9953, Vol. 2, no 3, article id 033603Article in journal (Refereed) Published
Abstract [en]

Using methods of statistical kinetic theory parametrized with first-principles interatomic interactions that include chemical and strain contributions, we investigated the kinetics of decomposition and microstructure formation in Al-Cu alloys as a function of temperature and alloy concentration. We show that the decomposition of the solid solution forming platelets of copper, known as Guinier-Preston (GP) zones, includes several stages and that the transition from GP1 to GP2 zones is determined mainly by kinetic factors. With increasing temperature, the model predicts a gradual transition from plateletlike precipitates to equiaxial ones and at intermediate temperatures both precipitate morphologies may coexist.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 2, no 3, article id 033603
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-225713DOI: 10.1103/PhysRevMaterials.2.033603ISI: 000427995000001OAI: oai:DiVA.org:kth-225713DiVA, id: diva2:1196727
Funder
Swedish Foundation for Strategic Research , RMA11-0090
Note

QC 20180411

Available from: 2018-04-11 Created: 2018-04-11 Last updated: 2018-04-11Bibliographically approved

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Gorbatov, O. I.

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