Modified Embedded-Atom Method Interatomic Potential for Mg-Y Alloys

Ahmad, Rasool and Groh, Sébastien and Ghazisaeidi, Maryam and Curtin, William A.. (2018) Modified Embedded-Atom Method Interatomic Potential for Mg-Y Alloys. Modelling and Simulation in Materials Science and Engineering, 26 (6). 065010.

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Official URL: https://edoc.unibas.ch/65046/

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An interatomic potential for the Mg–Y binary system is developed within the framework of the second-nearest-neighbor modified embedded-atom method (MEAM) based on a very good MEAM potential for pure Mg. The Mg–Y potential is fitted to a range of key physical properties, either experimental or computed by first-principles methods, including the Y interaction energy with basal and pyramidal stacking faults, and properties of the B2 Mg–Y intermetallic phase. Reasonable agreement is obtained—much better than existing potentials in the literature—but differences remain for subtle but important aspects of Y solutes in Mg. The predictions of the potential for Y misfit volume in Mg, Y solute interactions with the pyramidal II (c + a) edge dislocation and {1012} <1011> tension-twin boundary are then compared against recent density functional theory results, and reasonable accuracy is obtained. In light of the spectrum of results presented here, the applicability and limitations of this Mg–Y MEAM potential for investigating various plasticity phenomena in Mg–Y solid solution alloys are carefully discussed.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedical Engineering > Imaging and Computational Modelling > Center for medical Image Analysis & Navigation (Cattin)
UniBasel Contributors:Groh, Sebastien
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Oct 2018 12:39
Deposited On:08 Oct 2018 12:39

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