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Simulation of stress concentration in Mg alloys using the crystal plasticity finite element method / S.-H. Choi in Acta materialia, Vol. 58 N° 1 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 320–329 Titre : Simulation of stress concentration in Mg alloys using the crystal plasticity finite element method Type de document : texte imprimé Auteurs : S.-H. Choi, Auteur ; D.H. Kim, Auteur ; S.-S. Park, Auteur Année de publication : 2010 Article en page(s) : pp. 320–329 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Crystal  plasticity  Finite  element  Stress  concentration  Texture  Twinning Résumé : A crystal plasticity finite element method (CPFEM), considering both crystallographic slip and deformation twinning, was developed to simulate the spatial stress concentration in AZ31 Mg alloys during in-plane compression. A predominant twin reorientation (PTR) model was successfully implemented to capture grain reorientation due to deformation twinning in twin-dominated deformation. By using the direct mapping technique for electron backscatter diffraction (EBSD) data, CPFEM can capture the heterogeneity of stress concentration at the grain boundaries in AZ31 Mg alloys during in-plane compression. The model demonstrated that deformation twinning enhances the local stress concentration at the grain boundaries between untwinned and twinned grains. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006065 [article] Simulation of stress concentration in Mg alloys using the crystal plasticity finite element method [texte imprimé] / S.-H. Choi, Auteur ; D.H. Kim, Auteur ; S.-S. Park, Auteur . - 2010 . - pp. 320–329. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 320–329 Mots-clés : Crystal  plasticity  Finite  element  Stress  concentration  Texture  Twinning Résumé : A crystal plasticity finite element method (CPFEM), considering both crystallographic slip and deformation twinning, was developed to simulate the spatial stress concentration in AZ31 Mg alloys during in-plane compression. A predominant twin reorientation (PTR) model was successfully implemented to capture grain reorientation due to deformation twinning in twin-dominated deformation. By using the direct mapping technique for electron backscatter diffraction (EBSD) data, CPFEM can capture the heterogeneity of stress concentration at the grain boundaries in AZ31 Mg alloys during in-plane compression. The model demonstrated that deformation twinning enhances the local stress concentration at the grain boundaries between untwinned and twinned grains. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006065