Loss in coherency and coarsening behavior of Al3Sc precipitates

descriptionPublicationkeyboard_double_arrow_right Article 01 Feb 2004 English Publisher:Elsevier BVJournal:Acta Materialia, volume 52, pages 591-600 (issn: 1359-6454,

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Authors: S. Iwamura; Y. Miura;

doi: 10.1016/j.actamat.2003.09.042

Loss in coherency and coarsening behavior of Al3Sc precipitates

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Abstract

Abstract The coarsening behavior of the Al3Sc particles in Al–0.2wt%Sc alloy at 673–763 K is studied on the basis of TEM observations with the numerical model. Emphasis is on the effects of coherent/semi-coherent transition of the particles. The radius for coherent/semi-coherent transition of the Al3Sc particles is determined from TEM micrographs as 15–40 nm. The average particle radius, rave, of the Al3Sc particles obeys the rave3 growth low both in the coherent stage (rave 40 nm). However, in the intermediate stage, where coherent and semi-coherent particles coexist (15

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Kyushu University
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