Investigation of Ductile Fracture of Nanostructured Al-6082 Material

Abstract

In this paper we are going to investigate the ductile fracture in cold forming of nanostructured Al - 6082 alloy material during axi-symmetric collar (flanged) tests and cylindrical upsetting tests by using eight types of fracture criteria. The material of specimens were taken out of ECAP was made by one, four, and eight passes (route C) in three perpendicular axes. The material has ultrafine grain size and an anisotropic behaviour. A simple yield criterion and material law are used to describe the plastic deformation of the nanostructured material. The collar tests and cylindrical upsetting tests produced typical ductile fractures in all types of specimens.