Journal
SCRIPTA MATERIALIA
Volume 57, Issue 10, Pages 941-944Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.07.028
Keywords
magnesium alloys; precipitation; transmission electron microscopy (TEM); electron diffraction; domain structure
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beta'(1) precipitates in an Mg(97)Zn(2.5)y(0.5) alloy are shown to have a complex domain structure based on the structure of monoclinic Mg4Zn7 phase. All domains are oriented with [010]vertical bar vertical bar[0001](Mg) and one of the four planar matches with the matrix. Two of these orientations are related to two others by twinning on the (001) plane of the Mg4Zn7 phase. These orientations are brought about by crystallographic constraints from the matrix. An ordering of the domains creates a new structure. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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