Correlation between poly-modal grain size and peculiar mechanical properties of pure aluminum deformed by RCSR process

Nowadays, industrial demands on materials with high strength and superior physical properties have made ultra-fine grain metallic materials one of the hot topics for materials science studies. In the present study, the newly developed technique based on severe plastic deformation so-called Repetitive Corrugation and Straightening by Rolling (RCSR) was applied to study its effect on the microstructure and mechanical behavior of commercially pure aluminum. The microstructure and correlated mechanical behavior of specimens after RCSR was systematically studied. A polymodal microstructure as revealed by the microstructural studies, and high elongation with relative good strength after RCSR indicate promising results. Our studies show that the heterogeneous mode of deformation in RCSR could be responsible for the poly-modal microstructure that along with the proper evolution of texture components gives the material both high ductility and reasonable strength. In fact, the combination of RCSR performance and the physicomechanical properties of aluminum provide the opportunity to get outstanding tensile properties without any subsequent annealing process.