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Prediction of cooling rate dependent ordering in metallic glass transition using a two-state model

TitlePrediction of cooling rate dependent ordering in metallic glass transition using a two-state model
Publication TypeJournal Article
Year of Publication2010
AuthorsHao SG, Wang CZ, Li MZ, Napolitano RE, Mendelev MI, Ho KM
Journal TitleComputational Materials Science
Volume49
Pages615-618
Date Published09
ISBN Number0927-0256
Accession NumberISI:000281619100024
Keywordsalloys, cooling rate, local atomic arrangements, local order, metallic glass transition, polytetrahedral materials, supercooled liquids, two-state model
Abstract

A two-state theoretical model is proposed to study the evolution of local order when a good metallic glass former is cooled down from the liquid state. We find that the development of order depends strongly on the cooling rate and that the ordered fraction converges to an upper limit at low cooling rates. We compare our model predictions with molecular dynamics (MD) simulation results for the Zr35.5Cu64.5 binary system, revealing good agreement for the fast cooling rates accessible through MD. The analytical model proposed here, however, can be extended to much lower rates which correspond to experimentally accessible processing routes. (C) 2010 Elsevier B.V. All rights reserved.
URL<Go to ISI>://000281619100024
DOIDoi 10.1016/J.Commatsci.2010.06.002