Optimization of properties of directly consolidated Cu-C composite via thermoemechanical processing

Abstract

This diploma thesis deals with the direct consolidation of Cu-C powder composite (0.1 and 1 wt.% C) processed through a thermomechanical process via rotary swaging for a swaging ratio of 1.1 under warm temperature, with final diameters of the samples being 7, 6, and 5 mm. Gleeble compression test confirmed the presence of strain hardening without dynamic recrystallization, and the maximum stress achieved for both samples is 400-425MPa. FEA revealed that effective stress and strain are higher at the surface. SEM analysis confirms the graphite precipitate in sample 2, which increased the strength of the composite. Also, elongated grains and improved consolidation were achieved in 5mm samples.