Incorporation processes of extrinsic dislocations in singular, vicinal andgeneral grain boundaries in nickel

Authors
Poulat, S Decamps, B Priester, L Thibault, J
Citation
S. Poulat et al., Incorporation processes of extrinsic dislocations in singular, vicinal andgeneral grain boundaries in nickel, MAT SCI E A, 309, 2001, pp. 483-485
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
309
Year of publication
2001
Pages
483 - 485
Database
ISI
SICI code
0921-5093(20010715)309:<483:IPOEDI>2.0.ZU;2-L
Abstract
The relaxation of the stresses associated to grain boundary (GB) extrinsic dislocations is investigated by in situ transmission electron microscopy in nickel near-Sigma = 3 {1 1 1}, near-Sigma = 11 {3 1 1} and near-Sigma = 11 {3 3 2} GBs. The results show that the stress relaxation depends on the GB structure: in periodic GBs, it requires discrete interactions between inte rgranular dislocations; in non-periodic GBs, the widening of dislocation co ntrasts is attributed to a dislocation core spreading. (C) 2001 Elsevier Sc ience B.V. All rights reserved.