| A theoretical model is suggested which describes plastic deformation through detwinning processes in ultrafine-grained metallic materials containing high-density ensembles of nanoscale twins within grains (nanotwinned metals). In the framework of the suggested model, detwinning occurs via stress-driven migration of incoherent boundaries of nanoscale twins. The energy and stress characteristics of the detwinning processes in nanotwinned metals with face-centered cubic lattices are calculated. Our theoretical results are well consistent with corresponding experimental data reported in the literature. Also, the effect of the detwinning processes on the electric resistivity of nanotwinned metals is estimated. |
full paper (pdf, 304 Kb)