This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1016/j.actamat.2011.03.069 in citations.
Metadislocations in the complex metallic alloys T-Al-Mn-(Pd,Fe)
Metadislocations in the complex metallic alloys T-Al-Mn-(Pd,Fe)
We investigate dislocations in the complex metallic alloys T-Al-Mn-Pd and T-Al-Mn-Fe using high-resolution aberration-corrected scanning transmission electron microscopy. The dislocations consist of a large core and separated escort defects [1]. Upon movement, dislocations and escort defects locally...
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Personal Name(s): | Heggen, M. |
---|---|
Houben, L. / Feuerbacher, M. | |
Contributing Institute: |
Mikrostrukturforschung; PGI-5 |
Published in: | Acta materialia, 59 (2011) S. 4458 - 4466 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2011
|
Physical Description: |
4458 - 4466 |
DOI: |
10.1016/j.actamat.2011.03.069 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Acta Materialia
59 |
Subject (ZB): | |
Publikationsportal JuSER |
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520 | |a We investigate dislocations in the complex metallic alloys T-Al-Mn-Pd and T-Al-Mn-Fe using high-resolution aberration-corrected scanning transmission electron microscopy. The dislocations consist of a large core and separated escort defects [1]. Upon movement, dislocations and escort defects locally transform the material and introduce stacks of planar faults which represent a slab of a different but related structure. Deformation modes involving glide and climb are observed. We find different types of dislocations with Burgers vectors (b) over bar = -(-tau)(-n)(0 0 1), with n = 2, 3, 4. They are associated to two, four and six planar faults, respectively, and are identified as metadislocations. The structural connection between metadislocations in the present phase and those in R-, epsilon(6)-, and xi-phases is discussed. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | ||
653 | 2 | 0 | |2 Author |a High-resolution electron microscopy (HREM) |
653 | 2 | 0 | |2 Author |a Aluminium alloys |
653 | 2 | 0 | |2 Author |a Dislocation structure |
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500 | |a We thank Dipl.-Ing. C. Thomas and M. Schmidt for producing the sample material. This work was supported by the 6th Framework EU Network of Excellence "Complex Metallic Alloys" (Contract No. NMP3-CT-2005-500140) and the Deutsche Forschungsgemeinschaft (PAK 36). | ||
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