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@ARTICLE{Heggen:10980,
author = {Heggen, M. and Houben, L. and Feuerbacher, M.},
title = {{P}lastic deformation mechanism in complex solids},
journal = {Nature materials},
volume = {9},
issn = {1476-1122},
address = {Basingstoke},
publisher = {Nature Publishing Group},
reportid = {PreJuSER-10980},
pages = {332 - 336},
year = {2010},
note = {We thank C. Thomas and M. Schmidt for producing the
materials and J. Barthel for carrying out the HAADF-STEM
image simulation. 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).},
abstract = {In simple crystalline materials, plastic deformation mostly
takes place by the movement of dislocations. Although the
underlying mechanisms in these materials are well explored,
in complex metallic alloys--crystalline solids containing up
to thousands of atoms per unit cell--the defects and
deformation mechanisms remain essentially unknown. Owing to
the large lattice parameters of these materials, extended
dislocation concepts are required. We investigated a typical
complex metallic alloy with 156 atoms per unit cell using
atomic-resolution aberration-corrected transmission electron
microscopy. We found a highly complex deformation mechanism,
based on the movement of a dislocation core mediating strain
and separate escort defects. On deformation, the escort
defects move along with the dislocation core and locally
transform the material structure for the latter. This
mechanism implies the coordinated movement of hundreds of
atoms per elementary glide step, and nevertheless can be
described by simple rearrangement of basic structural
subunits.},
keywords = {J (WoSType)},
cin = {IFF-8},
ddc = {610},
cid = {I:(DE-Juel1)VDB788},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
shelfmark = {Chemistry, Physical / Materials Science, Multidisciplinary
/ Physics, Applied / Physics, Condensed Matter},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:20190769},
UT = {WOS:000275901000022},
doi = {10.1038/nmat2713},
url = {https://juser.fz-juelich.de/record/10980},
}