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Investigation of deformation mechanisms involved in the plasticity of AZ31 Mg alloy: in situ neutron diffraction and EPSC modelling
journal contribution
posted on 2008-11-25, 00:00 authored by O Muransky, D Carr, Matthew BarnettMatthew Barnett, E Oliver, P SittnerIn situ neutron diffraction and Elasto-Plastic Self-Consistent (EPSC) polycrystal modelling have been employed to investigate which deformation mechanisms are involved in the plasticity of extruded AZ31 Mg alloy during the tensile loading along the extrusion direction. On the basis of this study we were able to determine the relative activity of the slip and twinning deformation modes. By tuning the parameters of the EPSC model (i.e. the critical resolved shear strengths and hardening parameters), excellent agreement with the experimental data has been achieved. It is shown that the strain in the crystallographic ⟨c ⟩direction is accommodated mainly by ⟨c + a ⟩ dislocation slip on second-order pyramidal planes. The results further indicate that either slip of ⟨a ⟩dislocations occurs on {10.1} pyramidal planes or cross-slip from basal and prismatic planes takes place.
History
Journal
Materials science and engineering A: structural materials: properties, microstructures and processingVolume
496Issue
1-2Pagination
14 - 24Publisher
ElsevierLocation
Lausanne, SwitzerlandPublisher DOI
ISSN
0921-5093eISSN
1873-4936Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2008, ElsevierUsage metrics
Keywords
magnesiumdeformation mechanismsplasticityEPSC modellingneutron diffractionScience & TechnologyTechnologyNanoscience & NanotechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringScience & Technology - Other TopicsMaterials ScienceMAGNESIUM ALLOYTEXTURE DEVELOPMENTNONBASAL SLIPSIMULATIONBEHAVIORMETALSLIMechanical Engineering
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