Transformations of Cu(in) supersaturated solid solutions under high-pressure torsion

Abstract High-pressure torsion of six homogenized Cu–In alloys (2.3 to 13.5 at. % In) with negative mixing enthalpy has been studied. The torsion torque reached a steady-state after 1–2 anvil rotations. Differently to the alloys with positive mixing enthalpy, the Cu(In) solid solution did not decompose. Moreover, the precipitates of δ-phase in the Cu–13.5 at. % In alloy partially dissolved and additionally enriched the Cu(In) solid solution.