On the creep deformation of nickel foams under compression
| Autor: | Yves Bienvenu, Jean-Dominique Bartout, Samuel Forest, Anthony Burteau |
|---|---|
| Přispěvatelé: | Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Dislocation creep
Materials science Viscoplasticity Constitutive equation General Engineering Energy Engineering and Power Technology chemistry.chemical_element Compression (physics) Nickel Deformation mechanism Buckling chemistry Creep [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Composite material |
| Zdroj: | Comptes Rendus. Physique Comptes Rendus. Physique, Académie des sciences (Paris), 2014, 15, pp.705-718. ⟨10.1016/j.crhy.2014.09.004⟩ |
| ISSN: | 1631-0705 1878-1535 |
| DOI: | 10.1016/j.crhy.2014.09.004⟩ |
| Popis: | International audience; A finite-element computational strategy is developed to study the viscoplastic deformation mechanisms at work in a nickel foam sample under compression creep. The constitutive law for pure nickel accounts for both diffusional and dislocation creep mechanisms. The finite-element results show the competition between both mechanisms due to the strong heterogeneity of the stress distribution in the foam. The initiation of the viscoplastic buckling phenomenon leading to cell crushing in tertiary creep is illustrated. The overall model prediction is compared to the results of compression creep tests performed in vacuo at 900 °C. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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