Influence of Severe Plastic Deformation on Mechanical Properties and Structure of Aluminium Alloys

Abstract

Article is devoted to analysis of ECAP (Equal Channel Angular Pressing) method, which uses a high degree of deformation to achieve a very fine-grained structure of formed material. Utilization of The ECAP technology enables attainment of required properties of selected materials by using of severe plastic deformation (SPD methods). In the experimental part the influence of the number of passes through forming tool with classical geometry (angle of 90° between channels) was studied to achieve maximum hardening (expressed by deformation resistance and achieved value of hardness HV10). Also the metallographic analysis (detection of achieved grain refinement) was carried out. From comparison of results achieved at both alloys it can be stated that for given forming by ECAP method the EN AW-8006 alloy is preferable, because higher strength degree was obtained by achieving of very fine grained structure. When using the same method of forming by ECAP method the EN AW-2024 alloy has lower hardening and structure refinement.

Keywords

• severe plastic deformation
• mechanical properties
• fine-grained structure
• forming
• EN AW-2024
• EN AW-8006
• ECAP
• hardness
• transmission electron microscopy