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Solid solution decomposition and Guinier-Preston zone formation in Al-Cu alloys: A kinetic theory with anisotropic interactions
National Research Centre “Kurchatov Institute", Moscow, Russia.
KTH Royal Institute of Technology, Stockholm, Sweden;Institute of Quantum Materials Science, Ekaterinburg, Russia;Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia.ORCID iD: 0000-0001-8629-5193
Institute of Quantum Materials Science, Ekaterinburg, Russia;Institute of Metal Physics, Ural Division RAS, Ekaterinburg, Russia;Ural Federal University, Ekaterinburg, Russia.
KTH Royal Institute of Technology, Stockholm, Sweden.ORCID iD: 0000-0002-9920-5393
2018 (English)In: Physical Review Materials, E-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
American Physical Society, 2018. Vol. 2, no 3, article id 033603
Keywords [en]
Dynamics of phase separation, First order phase transitions, Kinetic theory, Phase diagrams, Phase separation, phase transition by order, Spinodal decomposition, Structural order parameter, Alloys, Solid solutions, Lattice models in condensed matter, Mean field theory, Statistical methods
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ltu:diva-72024DOI: 10.1103/PhysRevMaterials.2.033603ISI: 000427995000001Scopus ID: 2-s2.0-85054296064OAI: oai:DiVA.org:ltu-72024DiVA, id: diva2:1270422
Available from: 2018-12-13 Created: 2018-12-13 Last updated: 2023-05-08Bibliographically approved

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Gorbatov, Oleg

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