Dislocation density based crystal plasticity finite element model of polycrystal with grain boundary effect

Abstract : Grain boundaries play an important role in determining the mechanical properties of metallic materials. The impedance of dislocation motion at the boundary results in a strengthening mechanism. In addition, dislocations can pile-up, be transmitted or be absorbed by the grain boundaries based on the local stress state and grain boundary character. In this study, a dislocation density based crystal plasticity finite element model is applied to incorporate the interaction between the dislocations and the grain boundaries, and a simulation is conducted on polycrystalline alpha iron deformed to 12% in uniaxial tension. The results indicate that the geometrically necessary dislocation density is generally higher near the grain boundary than within the grain interior. Taylor factor mismatch sometimes reveals strong localization effects near the grain boundaries.
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Communication dans un congrès
Mei Li ; Carelyn Campbell; Katsuyo Thornton; Elizabeth Holm; Peter Gumbsch. 2nd World Congress on Integrated Computational Materials, Jul 2013, Salt Lake City, UT, United States. Springer, Proceedings of the 2nd World Congress on Integrated Computational Materials Engineering (ICME), pp.271-276, 2016, 〈10.1007/978-3-319-48194-4_44〉
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https://hal.univ-lorraine.fr/hal-01517454
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Soumis le : mercredi 3 mai 2017 - 11:41:20
Dernière modification le : mercredi 12 septembre 2018 - 01:27:28

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Zhe Leng, Alankar Alankar, Nathalie Allain-Bonasso, Francis Wagner. Dislocation density based crystal plasticity finite element model of polycrystal with grain boundary effect. Mei Li ; Carelyn Campbell; Katsuyo Thornton; Elizabeth Holm; Peter Gumbsch. 2nd World Congress on Integrated Computational Materials, Jul 2013, Salt Lake City, UT, United States. Springer, Proceedings of the 2nd World Congress on Integrated Computational Materials Engineering (ICME), pp.271-276, 2016, 〈10.1007/978-3-319-48194-4_44〉. 〈hal-01517454〉

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