SUPERALLOY EUTECTIC COMPOSITES WITH THE VI A REFRACTORY ELEMENTS - Cr, Mo AND W.

Abstract

Eutectics in the Ni, Al - refractory element (Cr, Mo, W) systems offer the potential for high temperature turbine blade and vane applications. The ternary phase diagrams for NiAlCr, NiAlMo and NiAlW can be manipulated to alter the eutectic phases and morphologies by simple quaternary alloying modifications. The resultant combination of chemistry and structure can be controlled to produce behavior well-matched to hot section component materials requirements. Growth of these alloys in terms of higher temperature applications should be possible, in view of the simplicity of present chemistries and the ease with which aligned structures can be produced.