ЛОКАЛЬНАЯ ДЕФОРМАЦИЯ В ПОВЕРХНОСТНЫХ СЛОЯХ НА ГРАНИЦЕ ТРУБЧАТОЕ ИЗДЕЛИЕ – ДОРН ПРИ ДЕФОРМИРУЮЩЕМ ПРОТЯГИВАНИИ

Abstract

The paper concerns to examination of deformation distribution along the wall of a tube-like article at conditions of the twodimensional local state of strain for plastic burnishing. According to the adopted point of view the local deformation concentrates mainly in a plastic fold (wave) of metal to move before the frontal face of the burnishing mandrel. The case when lack of the fold, i.e, the twodimensional state of strain, is observed in the paper. The local deformation is determined by computing elongation of a mass of metal structure grains from microphotographs before and after different rates of strain. The microphotographs are shot at several points along the
wall thickness and they are applied in the paper.