Publisher： Trans Tech Publications
E-ISSN： 1662-9795|2016|725|249-254
ISSN： 1013-9826
Source： Key Engineering Materials, Vol.2016, Iss.725, 2017-02, pp. : 249-254
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Abstract
In this study, using experiment results obtained by electron backscatter diffraction, information on crystal orientation is introduced into a computational model for crystal plasticity simulation considering the effects of grain boundaries and dislocation sources to express the effect of the microstructure of ultrafine-grained metals. Finite-element simulations are performed for a polycrystal of an aluminum plate under biaxial tension. The multiscale crystal plasticity simulations depict the yield surface of the ultrafine-grained aluminum produced by accumulative roll-bonding processes. The anisotropic material coefficients of a higher-ordered yield function for ultrafine-grained aluminum are derived using a genetic algorithm.
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