Mechanical properties and high-temperature deformation behaviour of particle-strengthened NiAl alloys

Alloying of NiAl with Ta or Nb leads to an alloy with high high-temperature strength. Additional alloying with Cr leads to additional precipitation hardening. Highest strength is obtained by directional solidification, while alloys with improved ductility have been prepared by powder metallurgy. High-temperature deformation results in dynamic and meta-dynamic recrystallization of the Laves phase. Prototype components for engine application have been produced.