Processing influences on elevated temperature properties of reaction synthesized Fe{sub 3}Al
- Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)
An Fe-28%Al alloy containing 5% Cr has been synthesized by reaction of elemental powders, followed by consolidation using hot isostatic pressing or hot extrusion. The resulting materials are fully dense, homogeneous, and have a gain size of less than 5{micro}m. Processing strongly influences the propensity toward secondary recrystallization. While the HIPped material is extremely resistant to grain growth, under some circumstances the hot extruded material undergoes secondary recrystallization, resulting in grain sizes of several millimeters. Elevated temperature tensile properties and strain rate sensitivities are reported for fine and very coarse grained materials. Grain boundary sliding is not a significant deformation mode for any of the materials. The properties are compared to those of Fe{sub 3}Al processed from conventional hot extruded prealloyed powder. It has been found that the reaction synthesized materials generally have superior elevated temperature tensile strength.
- DOE Contract Number:
- AC07-94ID13223
- OSTI ID:
- 233986
- Report Number(s):
- CONF-950908-; ISBN 0-87170-539-7; TRN: IM9624%%90
- Resource Relation:
- Conference: 2. international conference on heat resistant materials, Gatlinburg, TN (United States), 11-14 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Heat-resistant materials 2. Conference proceedings of the 2. international conference on heat-resistant materials; Natesan, K. [ed.] [Argonne National Lab., IL (United States)]; Ganesan, P. [ed.] [INCO Alloys International, Inc., Huntington, WV (United States)]; Lai, G.Y. [ed.] [Haynes International, Inc., Kokomo, IN (United States)]; PB: 687 p.
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IRON ALLOYS
SYNTHESIS
FABRICATION
GRAIN SIZE
TENSILE PROPERTIES
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
INTERMETALLIC COMPOUNDS
POWDERS
CHEMICAL REACTIONS
HOT PRESSING
EXTRUSION
RECRYSTALLIZATION
HEAT TREATMENTS
YIELD STRENGTH
STRAIN RATE
TRANSMISSION ELECTRON MICROSCOPY
PARTICULATES
OXIDES
EXPERIMENTAL DATA