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Rare Earth Oxide Dispersoid Stability and Microstructural Effects in Rapidly Solidified Ti3Al and Ti3A1-Nb

Published online by Cambridge University Press:  25 February 2011

J. A. Sutliff  and
R. G. Rowe
J. A. Sutliff
Affiliation:
General Electric Corporate Research and Development Schenectady, NY 12301
R. G. Rowe
Affiliation:
General Electric Corporate Research and Development Schenectady, NY 12301
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Abstract

The microstructures of titanium aluminide alloys containing a rare earth oxide dispersion have been characterized using analytical electron microscopy. The alloys, based on Ti3A1 (alpha-2), contained 0 to 10.7 atom% Nb and 0.5 atom% Er. Alloys were rapidly solidified by melt spinning and were subsequently consolidated by HIP and extrusion. The microstructure of each alloy was examined in the as-cast, as-HIP'ed, and as-extruded conditions. A fine dispersoid spaced less than 100 nm apart was observed in ribbon aged at 750°C. The effects of processing conditions on the dispersoid distribution as a function of matrix chemistry were studied. Hot deformation was also examined to investigate the nature of the interaction between the dispersoids and the matrix during deformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 371
Copyright
Copyright © Materials Research Society 1986

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References

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