TY  - JOUR
AU  - Heggen, M.
AU  - Houben, L.
AU  - Feuerbacher, M.
TI  - Metadislocations in the complex metallic alloys T-Al-Mn-(Pd,Fe)
JO  - Acta materialia
VL  - 59
SN  - 1359-6454
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - PreJuSER-18706
SP  - 4458 - 4466
PY  - 2011
N1  - 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).
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000291567900021
DO  - DOI:10.1016/j.actamat.2011.03.069
UR  - https://juser.fz-juelich.de/record/18706
ER  -