چكيده به لاتين
In this research the influence of pure shear extrusion (PSE) process as a severe plastic deformation technique on microstructure and mechanical properties of AA 1050 aluminum alloy is investigated. Therefore, Electron backscatter diffraction (EBSD) and tensile tests were carried out.
Initially, AA 1050 was extruded from 1 to 4 passes by route A, i.e. without rotation between each pass, and afterwards the microstructural modification of material was analyzed. Besides, in order to study further potencies of PSE and its effects on the bulk material, AA 1050 alloy was also deformed by route B, i.e. applying 90o rotation between each pass. Accordingly, samples were taken from the surface and center of the deformed material. EBSD analysis was applied to examine the effect of route B on grain refimenment of the peripheral and central regions of extruded samples after the second and fourth PSE passes.
EBSD test results revealed that route B, provides a more efficient grain refinement throughout the bulk material. Moreover, it was also proved that by applying both routes A and B, a more sufficient grain refinement takes place in the peripheral regions of the material in comparison with the central regions.
As a result, samples extruded via route B, as the optimized deformation route, were chosen for mechanical properties evaluation. It was clarified by the obtained tensile test results that after each PSE pass, the tesnsile strength as well as elongatin would be promoted.