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000018706 0247_ $$2DOI$$a10.1016/j.actamat.2011.03.069
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000018706 084__ $$2WoS$$aMaterials Science, Multidisciplinary
000018706 084__ $$2WoS$$aMetallurgy & Metallurgical Engineering
000018706 1001_ $$0P:(DE-Juel1)VDB5029$$aHeggen, M.$$b0$$uFZJ
000018706 245__ $$aMetadislocations in the complex metallic alloys T-Al-Mn-(Pd,Fe)
000018706 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2011
000018706 300__ $$a4458 - 4466
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000018706 440_0 $$067$$aActa Materialia$$v59$$x1359-6454$$y11
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000018706 500__ $$aWe thank Dipl.-Ing. C. Thomas and M. Schmidt for producing the sample material. This work was supported by the 6th Framework EU Network of Excellence "Complex Metallic Alloys" (Contract No. NMP3-CT-2005-500140) and the Deutsche Forschungsgemeinschaft (PAK 36).
000018706 520__ $$aWe 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.
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000018706 65320 $$2Author$$aHigh-resolution electron microscopy (HREM)
000018706 65320 $$2Author$$aAluminium alloys
000018706 65320 $$2Author$$aDislocation structure
000018706 65320 $$2Author$$aPhase transformations
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000018706 7001_ $$0P:(DE-Juel1)VDB4944$$aHouben, L.$$b1$$uFZJ
000018706 7001_ $$0P:(DE-Juel1)130637$$aFeuerbacher, M.$$b2$$uFZJ
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