Strength enhancement possibilities of low carbon steels

Purpose: The paper analyses methods of grain refinement and demonstrates development of structure and properties of metallic materials after severe plastic deformations (SPD). Design/methodology/approach: Technology ARB was experimentally verified. The material was rolled in 11 passes. Rolling proceeded at temperature 650 ̊C, with heating in furnace with inert atmosphere (Ar). Findings: True strain has achieved the value 9. Basic relations between magnitude of deformation, grain refinement and resulting mechanical properties were described. Bonding of degree was greater than 90%. Practical implications: ARB method is one of instrument for acquirement materials with ultrafine grain structure. Is it very simply apparatus, which can be used in practical technology (classical rolling mill). Originality/value: Development of structure was verified on low carbon steel. Obtained grain size was around 0.3 μm. Properties obtained by tensile test did not achieve the expected value. Grain size was homogenous in whole volume.