Microstructural changes in Cu-5.8 at.% In alloy caused by high pressure torsion

Abstract

Abstract Cu-5.8 at.% In alloy annealed at 380 °C for 400 h was subjected to high pressure torsion deformation at room temperature. Detailed microstructural studies were performed using scanning and transmission electron microscopy as well as X-ray diffraction. High pressure torsion resulted in strong grain refinement of the Cu matrix (to the nm range), while there was no refinement or dissolution of δ-phase (Cu7In3). The volume fraction of δ-phase after straining remained almost unchanged, thus indicating its strong stability under high pressure torsion.