Abstract
ABSTRACT Alloys based on B2 NiAl and FeAl are potential structural materials for high temperature applications. This paper summarizes some of the results from hot consolidation of these alloys in joint programs between CWRU and NASA Lewis Research Center. The major emphasis has been on using powders and consolidating them by hot extrusion and by hot pressing in order to obtain a range of microstructures. Alloying additions have been made in the elemental form as well as in the prealloyed forms. Oxide dispersion strengthening has been attempted. Dynamic recrystallization plays an important role in the microstructural development during hot consolidation of these alloys, the resulting grain size being controlled by powder variables as well as the processing parameters. Results of processing of cast alloys by hot extrusion techniques are also included for comparison.
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