Formation and Dispersion of Precipitates during Hot Deformation in Al–1%Mn Alloys

Abstract

In this study, precipitation behavior in hot workings on Al1%Mn alloy was investigated. It has been identified specimens used in this study show thermally stabilized substructures after plain strain compression (PSC) test as a hot working. PSC tests were carried out between 300°C and 500°C. By using small angle x-ray scattering (SAXS) method, dispersion state of precipitations formed in hot workings were estimated. It was considered minute precipitations less than 10 nm in diameter were formed in hot worked areas. These minute precipitations were increased with increasing in compression temperature. In invariant area heated at 400°C, precipitations less than 10 nm were not identified. By using of HAADF-STEM, these minute precipitations less than 10 nm were confirmed, and it was cleared due to EDS analysis the precipitations consist of four elements such as aluminum, manganese, iron and silicon.