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Metals 2011, 1(1), 3-15;

Evolution of Morphology and Microstructure in Electrodeposited Nanocrystalline Al–Mg Alloy Dendrites

Materials Science and Engineering Department, University of Florida, Gainesville, FL 32611, USA
Author to whom correspondence should be addressed.
Received: 8 August 2011 / Revised: 23 August 2011 / Accepted: 29 August 2011 / Published: 5 September 2011
(This article belongs to the Special Issue Nanocrystalline Metals and Alloys)
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Nanocrystalline Al–Mg dendrites were fabricated through galvanostatic electrodeposition. Initially feather-like morphology was formed exhibiting morphological evolution to smooth globules at its tips. With eventual deposition, rough globules formed over the smooth ones. The feather-like and smooth globules possessed supersaturated face centered cubic (fcc)–Al(Mg) phase with ~7 and ~20 at.% Mg respectively. The rough globules contained hexagonal close packed (hcp)–Mg(Al) phase with ~80 at.% Mg. Microstructural examinations revealed that the feather-like and rough globules possessed grain sizes of ~42 ± 15 and ~36 ± 12 nm respectively. The region, which exhibited morphological evolution from feather-like to smooth globules, possessed ~16 ± 7 nm grain size. The observed microstructural and compositional features were attributed to the local current density values. The formation of the Al–Mg dendrites is discussed in this paper. View Full-Text
Keywords: Al–Mg; nanocrystalline; dendrites; morphology; microstructure Al–Mg; nanocrystalline; dendrites; morphology; microstructure

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Tatiparti, S.S.V.; Ebrahimi, F. Evolution of Morphology and Microstructure in Electrodeposited Nanocrystalline Al–Mg Alloy Dendrites. Metals 2011, 1, 3-15.

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