In-situ high-energy X-ray diffraction and crystal plasticity modeling to predict the evolution of texture, twinning, lattice strains and strength during loading and reloading of beryllium

نویسندگان

چکیده

Deformation behavior of beryllium during compressive loading and cross-reloading is studied using in-situ high energy synchrotron X-ray diffraction microscopy crystal plasticity modeling. The evolution texture, twinning, elastic lattice strains, flow stress are measured compared with the predictions an advanced elastic-plastic self-consistent (EPSC) model. model initialized experimentally texture residual produced by a simulation cooling calibrated to establish set parameters portion data. rest data used for validation It shown that sufficiently flexible reproduce particularities pertaining complex strain-path-change strain rate sensitive deformation material including transients in stress-strain response, anisotropic hardening great accuracy single parameters. From comparison experimental predictions, we infer shifts active mechanisms between slip systems from soft hard vice versa as well twinning de-twinning primarily responsible drastic changes one path another. In particular, twins form in-plane followed either through-thickness direction or forming additional twin variants some existing another direction. consequence relative compression mediated history dependent dislocation density governing hardening. secondary effects improving come accounting stress, system-level backstress, latent

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ژورنال

عنوان ژورنال: International Journal of Plasticity

سال: 2022

ISSN: ['1879-2154', '0749-6419']

DOI: https://doi.org/10.1016/j.ijplas.2022.103217