Prediction of alloy precipitate shapes from first principles

S. Müller*, C. Wolverton, L. W. Wang, A. Zunger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We have elucidated the physical mechanisms governing the observed size-and temperature dependence of precipitate shapes in Al-Zn alloys via quantum-mechanical first-principles simulations. In remarkable quantitative agreement with alloy aging experiments, we find that with decreasing temperature and increasing average size, the precipitates change from spherical to plate-like shape. Although the precipitates are created by an inherently kinetic heat treatment process, the entire series of their size vs. shape relation can be explained in terms of thermodynamic arguments and understood in terms of strain and chemical energies.

Original languageEnglish (US)
Pages (from-to)33-39
Number of pages7
JournalEurophysics Letters
Volume55
Issue number1
DOIs
StatePublished - Jul 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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