Synthesis and brittle-to-ductile transition of the ω-Al0.7Cu0.2Fe0.1 tetragonal phase

Abstract Synthesis of ω-Al–Cu–Fe single phase material is reported. Microhardness tests performed over the temperature range 293–898 K indicate a brittle-to-ductile transition between 673 K and 823 K. Fracture toughness was determined from indentation cracks at 293 K. Both the hardness and fracture toughness are comparable to that of the icosahedral Al 0.635 Cu 0.240 Fe 0.125 material.