The joining simulation of nanostructured steel and aluminium cylinders by ECEP method

This study focused on developing bimetallic materials through the equal channel angular pressing (ECAP) process to combine the hardness of steel and the flexibility of aluminium. With two pieces made of steel and aluminium featuring differing elastic and plastic properties, the evaluation criteria used an average strain to assess material characteristics. The results showed that aluminium underwent compression and stretching during ECAP, leading to a higher strain of 13% in the inner part and a 6.4% increase in mass in the outer part. Steel experienced an 8.7% increase in strain and a 2.3% decrease in bulk. The bimetallic material displayed properties intermediate between aluminium and steel, with 43.3% less hardness than steel and 50.4% less flexibility than aluminium, but 89.9% more flexible than steel. The connection between aluminium and steel was attributed to friction between the materials, underscoring the successful integration of the desired hardness and flexibility properties in the bimetallic material.