In-situ composite formation iron metastable precursor phases in the Nb-Cr-Ti system
- Los Alamos National Lab., NM (United States)
- Univ. of Wisconsin, Madison, WI (United States)
Metastable bcc solid solutions have been produced through rapid solidification processing in the Nb-Cr-Ti system. The microstructures resulting from the metastable precursor phase decomposition are dual-phase with isolated bcc dispersoids in a Laves phase (NbCr{sub 2}) matrix. The mechanical properties of the precursor phases, monolithic ordered intermetallic phases, and composite structures have been examined with ultra low-load microindentation. The decomposed dual-phase alloys illustrate enhanced toughness as compared to the monolithic material. The metastable precursor phase processing scheme contrasts with other in-situ techniques in that the volume fractions of the phases can be designed to specific amounts, permitting an effective microstructural tailoring scheme to produce controlled composite microstructures of NbCr{sub 2}-based materials.
- OSTI ID:
- 77983
- Report Number(s):
- CONF-950201--; ISBN 0-87339-283-3
- Country of Publication:
- United States
- Language:
- English
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