Design of ordered intermetallic alloys for high-temperature structural use. [Ni/sub 3/V-CO/sub 3/V-Fe/sub 3/V; Ni/sub 3/Al]
Many ordered intermetallic alloys possess attractive high-temperature properties; however, low ductility and brittle fracture restrict their use for structural applications. This paper summarizes the current work on alloy design of ordered intermetallics based on the Ni/sub 3/V-Co/sub 3/V-Fe/sub 3/V and Ni/sub 3/Al systems. Both macroalloying and microalloying were used to improve the ductility and fabricability of these alloys. Macroalloying is aimed at controlling ordered crystal sructures and properties in (Ni,Co,Fe)/sub 3/V alloys, whereas microalloying is directed toward alleviating both intrinsic and extrinsic grain-boundary weakness in nickel aluminides based on Ni/sub 3/Al. Success in development of these ductile intermetallics is discussed, with emphasis on metallurgical principles involved in the alloy design.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6570079
- Report Number(s):
- CONF-840417-3; ON: DE85000897
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
COBALT ALLOYS
CRYSTAL STRUCTURE
DUCTILITY
FABRICATION
FAILURES
FRACTURES
GRAIN BOUNDARIES
INTERMETALLIC COMPOUNDS
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
TENSILE PROPERTIES
VANADIUM ALLOYS