A crystal plasticity study of heterophase interface character stability of Cu/Nb bicrystals

Bulk texture evolution of nanolamellar Zr–Nb composites processed via accumulative roll bonding

“…Based on these studies, these metals are generally expected to deform via multiple slip modes and not predominantly by twinning at the room temperature and quasi-static strain rates of the ARB process. Specifically, the Nb composition studied here has been found to deform primarily by {1 1 0}h1 1 1i slip and secondly by {1 1 2}h1 1 1i slip with no deformation twinning during large-strain rolling or uniaxial deformation [40,46] over a wide range of temperatures and strain rates [47]. The high-purity Zr composition used here has been shown in [48] to deform primarily by prismatic slip, secondly by pyramidal hc + ai slip, and, after large strains, also by basal slip.…”

“…At the fine length scales and high interface densities associated with nanolayer thicknesses, it is reasonable to think the influence of the interface is enhanced. It has been proposed, for instance, in fcc-bcc composites that the bimetal interface can influence slip and twinning activity in several ways, such as via nucleation and transmission of certain slip systems [80,81] and twinning systems [78], geometric constraints [80], kinematic constraints associated with codeformation [46] and its formation energy [67]. Many of these studies are carried out using atomic-scale simulations [78,[82][83][84], involving small numbers of dislocations and short time scales, and thus it is not straightforward to translate these results to texture evolution.…”

“…Many of these studies are carried out using atomic-scale simulations [78,[82][83][84], involving small numbers of dislocations and short time scales, and thus it is not straightforward to translate these results to texture evolution. Some attempts have been made to incorporate such dislocation-interface interactions into larger scale polycrystalline plasticity models, like VPSC or 3D full-field spatially resolved techniques, such as crystal plasticity finite element [46,47,[85][86][87]. Only very recently has CPFE been extended to examine the effect Fig.…”

A study of microstructure-driven strain localizations in two-phase polycrystalline HCP/BCC composites using a multi-scale model

“…A C C E P T E D Jia et al, 2013;Mayeur et al, 2015;Mayeur et al, 2013) and HCP/BCC composites (Ardeljan et al, 2014a) under plane strain compression. In these models, the individual phases were either polycrystalline or single crystals and in all cases, assumed to co-deform at the bimetal interface.…”

“…In the polycrystalline models, localized areas of stress or strain concentrations were observed. In the bicrystal models, whether localizations developed depended on the particular orientations being coupled (Jia et al, 2013;Mayeur et al, 2013) and how much the interface influenced slip (Mayeur et al, 2015). Simulating the transition from localized stress or strain to shear banding, however, required incorporating an additional, non-crystallographic shear band system (Jia et al, 2013).…”