A new approach to crystal spin calculation during deformation texture development

Continuity in the plastic strain rate and its influence on texture evolution

“…A notable difference in these texture results is the overall weaker texture from the nonlocal simulation relative to the local and Taylor simulations, which is consistent with experimental evidence. Bolmaro et al (2000) found that a co-spin material point simulation resulted in a close correlation with the experimental texture and a maximum intensity approximately six times less than a simulation without co-spin.…”

“…This continuity condition implies a continuous lattice spin field (often referred to as the spin field hereafter) and has been dubbed co-rotation or cospin. Techniques of this nature have been used in self-consistent material point simulations (Bolmaro et al, 2000;Tomé et al, 2002), also coupled with finite elements Signorelli et al, 2006) resulting in textures that are closer to experimental values. This also proved to be useful in predicting recrystallization textures by allowing for grain fragmentation through the co-rotation of neighboring segments of grains (Bolmaro et al, 2005).…”

Predicting intragranular misorientation distributions in polycrystalline metals using the viscoplastic self-consistent formulation

“…Starting with Eq. (20) and assuming that the misorientations with respect to the mean are infinitesimal rotations, the same expression (Eq. (24)) can be derived.…”

“…Bolmaro et al [20] represented each grain within the viscoplastic self-consistent (VPSC) model by two fragments to which random neighbors were assigned. Co-rotation of grain fragments and their respective neighbors was assumed, resulting in the development of local misorientation between fragments.…”

Transformation Textures in Steels: A Simulation Based on Micromechanical Modeling Data

“…Grain fragmentation was allowed by cospinning [13,14] and a misorientation between fragments is generated during the deformation process. [15] The outcoming micromechanical data comprehends a set of 10,000 crystallite orientations, representative of the grains, their volume fractions, CRSS, individual strains and stresses, and misorientations among fragments and neighbors. The capability of calculating misorientations between grains and fragments is of paramount importance, since the RX models use that micromechanical data to obtain hot band textures of steels deformed on the RX regime.…”