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A multiscale experimentally-based finite element model to predict microstructure and damage evolution in martensitic steels

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dc.contributor.author Meade, Edward D.
dc.contributor.author Sun, Fengwei
dc.contributor.author Tiernan, Peter
dc.contributor.author O’Dowd, Noel P.
dc.date.accessioned 2021-03-29T10:28:45Z
dc.date.available 2021-03-29T10:28:45Z
dc.date.issued 2021
dc.identifier.uri http://hdl.handle.net/10344/9933
dc.description peer-reviewed en_US
dc.description.abstract The objective of this work is to investigate the plastic deformation and associated microstructural evolution and damage in a martensitic steel at multiple length scales, using a combination of finite-element (FE) modelling and experimental measurements. A multiscale model is developed to predict damage evolution in the necked region of a uniaxial tensile test specimen. At the macroscale, a von Mises plasticity FE model in conjunction with a Gurson-Tvergaard-Needleman damage model is used to predict the global deformation and damage evolution. A physically based crystal plasticity model, incorporating a damage variable is used to investigate the microscale plastic deformation behaviour and the changes in crystal orientation under large strains. The model predicts that slip bands form at the onset of plastic deformation and rotate to become almost parallel to the loading direction at large strain. In the necked region, the initially randomly orientated microstructure develops texture, brought about by inelastic deformation and lattice rotation towards the stable [011] orientation. The predicted crystal orientations and missorientation distribution are in good agreement with measurements obtained through electron backscatter diffraction in the centre of the necked region of the tensile test specimens. The experimental and modelling techniques developed in this work can be used to provide information on the evolution of plastic deformation and damage as well as the orientation-dependent crack initiation and microstructural evolution during large deformation of engineering materials. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries International Journal of Plasticity;139, 102966
dc.subject Martensite en_US
dc.subject Crystal plasticity en_US
dc.subject Hierarchical microstructure en_US
dc.title A multiscale experimentally-based finite element model to predict microstructure and damage evolution in martensitic steels en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.ijplas.2021.102966
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor Chongqing University en_US
dc.relation.projectid 14/IA/2604 en_US
dc.relation.projectid 0241001104467 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US


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