The effect of iron, gallium and molybdenum on the room temperature tensile ductility of NiAl

Abstract

The low density and high thermal conductivity of NiAl compared to nickel-base superalloys make NiAl alloys attractive materials for turbine airfoils. The lack of ductility at lower temperatures has been one of the barriers limiting the use of NiAl alloys. The authors identify microalloying additions to NiAl which have demonstrated very significant improvements in the room temperature tensile ductility. The purpose of this paper is to provide details of the experimental data and preliminary information on the potential mechanisms for the ductility improvement.