Recrystallization texture of Copper alloy layers in a Laminated Composite

摘要

Monolithic copper rolled to high deformation is known to exhibit "Cube" orientedrn({100} < 001 > ) recrystallization texture when annealed. This was not the case for the Cu alloy in a CA-Nb (Copper alloy - Niobium) layered composite when annealed even to temperature of 800 ℃. It is shown in this study that the presence of alloy elements of 0.1 wt%Fe and 0.03 wt%P can inhibit the cube dominated texture and develop the R orientation ({124} < 211 > ) instead for the copper alloy. It will also be shown that retained rolling texture is obtained instead for the Cu alloy in the composite via continuous recrystallization. The layered composite was processed using the roll-bonding technique. The roll-bonded samples were annealed at temperatures of 300℃, 500℃, 600℃, 700℃ and 800℃. Microstructural and texture characterization of the monolithic Cu and the composite after the heat treatments are carried out using X-ray techniques. Hardness measurement using an Instrumented-depth-sensing equipment was also used to study the hardness and recrystallization evolution of the Cu alloy in the composite.