Towards superior high temperature properties in low density ferritic AlCrFeNiTi compositionally complex alloys

Three novel precipitation strengthened bcc alloys which exhibit a smooth microstructural gradient with composition have been fabricated in bulk form by induction casting. All three alloys are comprised of a mixture of disordered A2-(Fe, Cr) and L21-ordered (Ni, Fe)2AlTi type phases both as-cast and after long-term annealing at 900 ∘C. The ratio of disordered to ordered phase, primary dendrite fraction, and overall microstructural coarseness all...