Structure and Mechanical Properties of Powder Copper Produced by Angular Extrusion

Abstract

The influence of equal-channel angular extrusion on the structurization and mechanical properties of powder billets of high initial porosity has been studied. The presence of a densification centre with the sizes and density increasing with accumulated strain is established. The densification center after the third pass has 0.99 relative density, 845 MPa microhardness, 80 nm grains, and 530 MPa compression yield strength. Angular extrusion allows production of powder material with high mechanical properties from high-porous initial billets after three passes.