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Dislocation-source shutdown and the plastic behavior of single-crystal micropillars

Tang, H ; Schwarz, K W ; Espinosa, H D

Physical review letters, 2008-05, Vol.100 (18), p.185503-185503, Article 185503 [Periódico revisado por pares]

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Título:
Dislocation-source shutdown and the plastic behavior of single-crystal micropillars
Autor: Tang, H ; Schwarz, K W ; Espinosa, H D
É parte de: Physical review letters, 2008-05, Vol.100 (18), p.185503-185503, Article 185503
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Dislocation dynamics simulations have been used to study the stress-strain response of single-crystal micropillars containing initial dislocation networks generated via a relaxation procedure intended to approximate real thermal annealing processes. We find that, when such networks are loaded, they exhibit periods of plastic deformation, caused by the operation of single junction-stabilized spiral sources, followed by intervals of purely elastic straining when the sources shut down. The results provide insight into the mechanisms responsible for the experimentally observed staircase stress-strain behavior.
Editor: United States
Idioma: Inglês

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