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Load partitioning between single bulk grains in a two-phase duplex stainless steel during tensile loading / Peter Hedström in Acta materialia, Vol. 58 N° 2 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 734-744 Titre : Load partitioning between single bulk grains in a two-phase duplex stainless steel during tensile loading Type de document : texte imprimé Auteurs : Peter Hedström, Auteur ; Tong-Seok Han, Auteur ; Ulrich Lienert, Auteur Article en page(s) : pp. 734-744 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : X-ray  diffraction  Synchrotron  radiation  Stainless  steels  Finite-element  modeling  (FEM)  Single-grain  strain Index. décimale : 669 Métallurgie Résumé : The lattice strain tensor evolution for single bulk grains of austenite and ferrite in a duplex stainless steel during tensile loading to 0.02 applied strain has been investigated using in situ high-energy X-ray measurements and finite-element modeling. Single-grain X-ray diffraction lattice strain data for the eight austenite and seven ferrite grains measured show a large variation of residual lattice strains, which evolves upon deformation to the point where some grains with comparable crystallographic orientations have lattice strains different by 1.5 × 10−3, corresponding to a stress of not, vert, similar300 MPa. The finite-element simulations of the 15 measured grains in three different spatial arrangements confirmed the complex deformation constraint and importance of local grain environment. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] Load partitioning between single bulk grains in a two-phase duplex stainless steel during tensile loading [texte imprimé] / Peter Hedström, Auteur ; Tong-Seok Han, Auteur ; Ulrich Lienert, Auteur . - pp. 734-744. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 734-744 Mots-clés : X-ray  diffraction  Synchrotron  radiation  Stainless  steels  Finite-element  modeling  (FEM)  Single-grain  strain Index. décimale : 669 Métallurgie Résumé : The lattice strain tensor evolution for single bulk grains of austenite and ferrite in a duplex stainless steel during tensile loading to 0.02 applied strain has been investigated using in situ high-energy X-ray measurements and finite-element modeling. Single-grain X-ray diffraction lattice strain data for the eight austenite and seven ferrite grains measured show a large variation of residual lattice strains, which evolves upon deformation to the point where some grains with comparable crystallographic orientations have lattice strains different by 1.5 × 10−3, corresponding to a stress of not, vert, similar300 MPa. The finite-element simulations of the 15 measured grains in three different spatial arrangements confirmed the complex deformation constraint and importance of local grain environment. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]