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Caught in the act: Grain-switching and quadrijunction formation in annealed aluminum
Journal article   Peer reviewed

Caught in the act: Grain-switching and quadrijunction formation in annealed aluminum

Siddhartha Pathak, Roger D. Doherty, Anthony D. Rollett, Johann Michler and Kilian Wasmer
Scripta materialia, v 69(1), pp 37-40
01 Jul 2013

Abstract

Materials Science Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Nanoscience & Nanotechnology Science & Technology Science & Technology - Other Topics Technology
Contrary to current understanding, an apparently stable single-phase quadrijunction, and one lacking any low-energy grain boundary member, has been experimentally observed during grain switching in large (similar to mm) grained pure annealed aluminum. Electropolishing below the quadrijunction revealed a 3-D microstructure characterized by a rapidly shrinking grain with a faceted boundary indicating a significant anisotropy of energy and/or mobility. This unusual occurrence is described in detail in the expectation that a reasonable model for this observation might be found. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

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Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Nanoscience & Nanotechnology
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