3D configuration and mechanical properties of the helically architectured hybrid materials processed by High Pressure Torsion Extrusion
Configuration, structure and tensile properties of commercially pure copper and hybrid samples processed by High Pressure Torsion Extrusion (HPTE) had been investigated. HPTE technique allows to achieve large strains (up to 30) during one pass in large-scale rod specimens with the diameter of 10 mm and the length of 35 mm. Hybrid materials of two kinds combining copper matrix with soft (aluminum) and hard (iron) wires were prepared. After HPTE the microstructure of Cu matrix was refined and armoring wires had got helical shape. X-ray tomography and the resulting 3D configurations allowed us to see the change in the shape of the reinforcing elements after HPTE.
We performed room temperature mechanical tests and microstructure investigations using optical and scanning electron microscopy of the as-processed samples. In case of armoring of Cu with Fe wires, multistage tensile curve of the hybrid samples were obtained. Resulting yield and ultimate tensile strength were discussed.