Anisotropy in hexagonal close-packed structures: improvements to crystal plasticity approaches applied to magnesium alloy
| العنوان: | Anisotropy in hexagonal close-packed structures: improvements to crystal plasticity approaches applied to magnesium alloy |
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| المؤلفون: | Sven C. Vogel, Carlos N. Tomé, Haitham El Kadiri, A.L. Oppedal, Mark F. Horstemeyer |
| المصدر: | Philosophical Magazine. 93:4311-4330 |
| بيانات النشر: | Informa UK Limited, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Materials science, Metallurgy, Hardening (metallurgy), Close-packing of equal spheres, Magnesium alloy, Composite material, Condensed Matter Physics, Microstructure, Crystal twinning, Anisotropy, Crystal plasticity, Electron backscatter diffraction |
| الوصف: | Due to its polarity, twinning in strongly textured hexagonal close packed (HCP) structures can be maximized or minimized under particular loading conditions. The resulting anisotropy can be dramatically demonstrated for magnesium with a fibre, for example. The stress–strain behaviour from compression loading parallel to the fibre produces a ‘parabolic’ stress–strain curve, but a ‘sigmoidal’ curve when loaded normal to the fibre. When modelling anisotropy in HCP structures with crystal plasticity, contemporary researchers usually fit hardening parameters to only these two extreme cases, i.e., maximized or minimized twinning activity, presuming that the same parameters would interpolate the correct behaviour under any other transitional stress direction. A comparison with experiments presented in this paper demonstrates that this assumption is not fully accurate, whether using the phenomenological Voce hardening model or the dislocation density based hardening model in the VPSC (visco-plastic self-... |
| تدمد: | 1478-6443 1478-6435 |
| DOI: | 10.1080/14786435.2013.827802 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::72bb05780bf8f20dcb88227c5a05dace https://doi.org/10.1080/14786435.2013.827802 |
| رقم الانضمام: | edsair.doi...........72bb05780bf8f20dcb88227c5a05dace |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14786443 14786435 |
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| DOI: | 10.1080/14786435.2013.827802 |