The intermittency of plasticity in an Al3%Mg alloy
| Autor: | Y. Bougherira, T.A. Lebedkina, Claude Fressengeas, N. P. Kobelev, Mikhail Lebyodkin, Denis Entemeyer |
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| Přispěvatelé: | Laboratoire de physique et mécanique des matériaux (LPMM), Université Paul Verlaine - Metz (UPVM)-Institut National Polytechnique de Lorraine (INPL)-Ecole Nationale d'Ingénieurs de Metz (ENIM)-Centre National de la Recherche Scientifique (CNRS), Institute of Solid State Physics (ISSP, RAS), Russian Academy of Sciences [Moscow] (RAS) |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
History
Materials science Strain (chemistry) Portevin–Le Chatelier effect Thermodynamics 02 engineering and technology Plasticity Strain rate 021001 nanoscience & nanotechnology 01 natural sciences Computer Science Applications Education law.invention Stress (mechanics) Acoustic emission law Tension (geology) Intermittency 0103 physical sciences [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph] Composite material 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Physics: Conference Series Journal of Physics: Conference Series, IOP Publishing, 2010, 240, pp.012009. ⟨10.1088/1742-6596/240/1/012009⟩ |
| ISSN: | 1742-6588 1742-6596 |
| DOI: | 10.1088/1742-6596/240/1/012009⟩ |
| Popis: | International audience; Statistics of acoustic emission accompanying plastic deformation and of stress serrations caused by the Portevin-Le Chatelier effect are studied during tension of an Al3%Mg alloy at room temperature. Power-law distributions of acoustic emission reflecting self-organization of dislocations and intermittency of plastic flow are found, irrespective of the strain rate, both before and after the critical strain for the onset of the serrated flow. In contrast, several regimes including both power-law and peaked distributions are observed at the macroscopic scale of stress serrations, depending on the applied strain rate. |
| Databáze: | OpenAIRE |
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