Changes of structure and crystallographic texture of cladding tubes from austenitic steel under thermal creep testing

摘要: The process of changes in structure and crystallographic texture cladding tubes from austenitic steel ChS68 under thermal creep testing were studied. Testing was conducted at the temperature 700 oC air by their stretching axial direction stress 160 MPa until rupture. By data phase analysis a number processes, accompanying plastic deformation during tests elevated temperature, identified. main components original tube, as well different parts tested tube are {110} {112} . In rupture zone component tension with axis along becomes stronger. This effect is connected activation dislocation slip deformed area near new-formed neck. At same time character indicates to development dynamic recrystallization, conditioned total influence all factors, which control passage creep. addition, it revealed martensitic transformations maximal result its tests.