%0 Journal Article
%A Heggen, M.
%A Houben, L.
%A Feuerbacher, M.
%T Metadislocations in the complex metallic alloys T-Al-Mn-(Pd,Fe)
%J Acta materialia
%V 59
%@ 1359-6454
%C Amsterdam [u.a.]
%I Elsevier Science
%M PreJuSER-18706
%P 4458 - 4466
%D 2011
%Z 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).
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000291567900021
%R 10.1016/j.actamat.2011.03.069
%U https://juser.fz-juelich.de/record/18706