Grain nucleation and growth during phase transformations

Research output: Contribution to journalJournal article – Annual report year: 2002Researchpeer-review

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The mechanical properties of polycrystalline materials are largely determined by the kinetics of the phase transformations during the production process. Progress in x-ray diffraction instrumentation at synchrotron sources has created an opportunity to study the transformation kinetics at the level of individual grains. Our measurements show that the activation energy for grain nucleation is at least two orders of magnitude smaller than that predicted by thermodynamic models. The observed growth curves of the newly formed grains confirm the parabolic growth model but also show three fundamentally different types of growth. Insight into the grain nucleation and growth mechanisms during phase transformations contributes to the development of materials with optimal mechanical properties.
Original languageEnglish
JournalScience
Volume298
Issue number5595
Pages (from-to)1003-1005
ISSN0036-8075
DOIs
Publication statusPublished - 2002
CitationsWeb of Science® Times Cited: No match on DOI
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