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Numerical analysis of twin thickening process in magnesium alloys
journal contribution
posted on 2017-02-01, 00:00 authored by F Siska, L Stratil, J Cizek, Alireza Ghaderi, Matthew BarnettMatthew BarnettA finite element study of the stress field evolution around the {101¯2} tensile twin of different thickness in magnesium alloy is performed. The system is represented by the 2D models of one and three elastic elliptical inclusions with different aspect ratios surrounded by the plastic matrix. Anisotropic elasticity and crystal plasticity theory are used to describe the material behavior. Numerical results for single inclusion overestimate the initial stress for the stable twin aspect ratio by a factor of two compared to the experimental results. Multiple inclusions case obtains values closer to the experimental ones. Therefore it is concluded that the process of twin thickening cannot be solved within the analysis of the single inclusion and an interaction between twins in the same and neighboring grains plays a crucial role during the twin thickening process.
History
Journal
Acta materialiaVolume
124Pagination
9 - 16Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
1359-6454Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2016, Acta Materialia Inc.Usage metrics
Categories
Keywords
Magnesium alloyTwinningFEMCrystal plasticityScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringMaterials ScienceCLOSE-PACKED METALSSTRESS STATEHCP METALSDEFORMATIONNUCLEATIONRELAXATIONZIRCONIUMGROWTHMODELSLIPMechanical EngineeringCondensed Matter Physics
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