A new criterion for elasto-plastic transition in nanomaterials: Application to size and composite effects on Cu–Nb nanocomposite wires
| Autor: | Vanessa Vidal, Ludovic Thilly, Steven Van Petegem, Pierre-Olivier Renault, Helena Van Swygenhoven, Florence Lecouturier, Bernd Schmitt |
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| Přispěvatelé: | Laboratoire de Physique des Matériaux (PhyMat), Université de Poitiers-Centre National de la Recherche Scientifique (CNRS), Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Outillages, Matériaux et Procédés (CROMeP), IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire de Planétologie de Grenoble (LPG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers, Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA) |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Polymers and Plastics Composite number 02 engineering and technology Work hardening 01 natural sciences Stress (mechanics) 0103 physical sciences Line broadening Composite material Plastic deformation Elastic modulus 010302 applied physics Nanocomposite Metals and Alloys Bauschinger effect 021001 nanoscience & nanotechnology Microstructure X-ray diffraction Electronic Optical and Magnetic Materials [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] Tangent modulus Ceramics and Composites 0210 nano-technology |
| Zdroj: | Acta Materialia Acta Materialia, 2009, 57, pp.3157. ⟨10.1016/j.actamat.2009.03.021⟩ Acta Materialia, Elsevier, 2009, 57, pp.3157. ⟨10.1016/j.actamat.2009.03.021⟩ |
| ISSN: | 1359-6454 |
| Popis: | International audience; Nanocomposite wires composed of a multi-scale Cu matrix embedding Nb nanotubes are cyclically deformed in tension under synchrotron radiation in order to follow the X-ray peak profiles (position and width) during mechanical testing. The evolution of elastic strains vs. applied stress suggests the presence of phase-specific elasto-plastic regimes. The nature of the elasto-plastic transition is uncovered by the "tangent modulus" analysis and correlated to the microstructure of the Cu channels and the Nb nanotubes. Finally, a new criterion for the determination of the macroyield stress is given as the stress to which the macroscopic work hardening, θa = dσa/dε0, becomes smaller than one third of the macroscopic elastic modulus. |
| Databáze: | OpenAIRE |
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