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Microscale modelling of the deformation of a martensitic steel using the Voronoi Tessellation method

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Show simple item record Sun, Fengwei Meade, Edward D. O'Dowd, Noel P. 2019-01-24T16:38:58Z 2018
dc.description peer-reviewed en_US
dc.description.abstract The deformation of a martensitic steel (P91) at the microscale is investigated using the finite element method. The approach takes into account the hierarchical grain-packet-block microstructure of the steel as determined experimentally by electron backscatter diffraction (EBSD). The orientation relationship for P91 between the prior austenite grain (PAG) and the martensitic packet/block is determined and found to be consistent with the Kurdjumow-Sachs (K-S) relationship. This relationship is incorporated within a finite-element model to represent the material microstructure, using a representative volume element (RVE) generated by a modified centroidal Voronoi tesselation (VT) approach. A non-linear, rate dependent, finite strain crystal plasticity model is used to simulate the mechanical response of the material at the micro- and macro-level and the sensitivity of the results to the model assumptions is investigated. It is found that the global (macro) mechanical response predicted by the RVE generated using the modified VT model is in good agreement with that predicted by an RVE taken directly from the measured EBSD microstructure. The influence of block/packet/grain boundaries on the local (micro) deformation is examined and it is found that the microscale prediction obtained using the RVE based on the modified VT microstructure, with an appropriate choice of microstructural parameters, is consistent with that obtained using the measured EBSD map. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation 14IA2604 en_US
dc.relation.ispartofseries Journal of the Mechanics and Physics of Solids;113, pp. 35-55
dc.rights This is the author’s version of a work that was accepted for publication in Journal of the Mechanics and Physics of Solids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of the Mechanics and Physics of Solids, 2018, 113, pp. 35-55, en_US
dc.subject martensite steel en_US
dc.subject crystal plasticity en_US
dc.subject Voronoi tessellation en_US
dc.subject microstructure en_US
dc.subject finite element modelling en_US
dc.title Microscale modelling of the deformation of a martensitic steel using the Voronoi Tessellation method 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.jmps.2018.01.009
dc.contributor.sponsor SFI en_US
dc.relation.projectid 14/IA/2604 en_US 2020-01-31
dc.embargo.terms 2020-01-31 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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