New type of precipitate in Mg-rare-earth alloys
This paper describes the crystallographic features of a platelet-shaped precipitate that forms in the early stage of age hardening of Mg alloys containing rare-earth elements in the Ce subgroup. Transmission electron microscopy combined with computer simulation revealed that the precipitate, the hab...
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Published in | Philosophical magazine. A, Physics of condensed matter. Defects and mechanical properties Vol. 82; no. 3; pp. 497 - 510 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis Group
01.02.2002
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Online Access | Get full text |
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Summary: | This paper describes the crystallographic features of a platelet-shaped precipitate that forms in the early stage of age hardening of Mg alloys containing rare-earth elements in the Ce subgroup. Transmission electron microscopy combined with computer simulation revealed that the precipitate, the habit plane of which is a {1100} matrix prism plane, is morphologically analogous to Guinier-Preston zones in Al-Cu alloys, that is two dimensional, but possesses an ordered structure based on the D0
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superlattice. The precipitate also contains periodically arranged atomic steps that are similar to antiphase boundaries in ordered alloys. These periodic steps result in a split of superlattice reflections similar to that observed in diffraction patterns obtained from a long-period superlattice such as CuAu II. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0141-8610 1460-6992 |
DOI: | 10.1080/01418610208239612 |