- Conference date: 13-17 June 2004
- Location: Columbus, Ohio (USA)
A crystal‐plasticity finite‐element method was applied to predict the flow behavior of two‐phase face‐centered‐cubic (fcc) and hexagonal‐close‐packed (hcp) alloy systems as a function of both the relative flow stresses of the phases and their volume fractions. The finite‐element model used an equiaxed microstructure typical of a wrought material in which individual grains were resolved with either cube elements or a dodecahedral geometry consisting of 48 tetrahedral elements. The relative strength differences between grains were quantified through differences in crystallographic orientation (geometric strength) or resolved shear strength at the slip system level (material strength). With this methodology, the flow behavior and strain‐rate partitioning between the phases were established as a function of both initial crystallographic orientation and initial slip system strength. When the model comprised micro‐scale discretization, the predicted strain‐rate partitioning between the phases was found to be in agreement with a self‐consistent modeling approach that also incorporated strength differences between the two phases.
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