Texture analysis in ultrafine grained coppers processed by equal channel angular pressing

Abstract

Electrolytic tough pitch (ETP) and fire refined high conductivity (FRHC) copper samples were severely deformed at room temperature by equal channel angular pressing (ECAP) up to 16 passes (ε ~ 1 per pass), following route Bc. The effect of the initial texture on the evolution of texture after the ECAP process for both materials was analyzed. The annealed materials present a marked anisotropy, with a texture controlled by the <110> fiber. According to the orientation distribution function (ODF), this initial behavior allows the presence of a strong C ({001} <110>) component after the first two ECAP passes in both coppers. However in the second pass the C component significantly increases in the FRHC copper, whereas the ETP copper presents a much more balanced behavior of the A 1 * (111) [ 11 2] and A 2 * (111)[11 2 ] components. The textures obtained for both coppers after each ECAP pass exhibit predominant orientations with continuous distributions along the orientation fiber with simple shear texture.

Hardness and Texture of Electrolytic Copper Processed by ECAP at Ambient and Warm Temperature

“…4, the ODF is only at ϕ = 0° and ϕ = 45° for the sequence of number of ECAP passes in the route A and Bc in the ambient temperature condition. As can be seen, using the ODF of cold processed samples by ECAP, the texture presented by the evolution of passes through route A, it was found that right after the first pass, the Brass component (B) (110) [11 2] appeared of recrystallization texture and after the second pass, the components C (001) [ It can be said that the results obtained are following those found in the literature, as can be seen in the research carried out by Higuera and Cabrera [20]. They processing copper by ECAP via the Bc route at ambient temperature and demonstrated that after the first pass was carried out, the material preferentially exhibited deformed fiber B, due to a high proportion of component C with a moderate presence of components B/𝐵 and A/𝐴 ̅ .…”