Properties of large heats of Fe sub 3 Al-based alloys
The scaleup of three Fe{sub 3}Al-based alloys at several commercial vendors is described. The scaleup processes examined the effect of crucible materials (MgO versus Al{sub 2}O{sub 3}), melting practice, vacuum-induction melting, vacuum-arc remelting, electroslag remelting, and processing under commercial conditions. Each alloy is designed for a specific use: sulfidation resistance, room-temperature ductility, and high-temperature strength. One of the alloys was also scaled up through powder production by nitrogen-gas atomization. The scaled-up heats varied in size from 50 to 250 kg (100 to 500 lb). The ingot sizes varied from 38- to 203-mm (1 1/2- to 8-in.) diam. The scaleup processes occurred at Ametek Specialty Metal Products Division; Haynes International, Inc.; Carpenter Technology Corporation; Special Metals Corporation; and Precision Rolled Products, Inc. The processing of 102-mm-diam (4-in.) ingots at the Oak Ridge National Laboratory into plate and sheet is described in detail. Tensile and creep data on a large powder-metallurgy and cast-and-worked alloys are presented. Recommendations are made for future work on the heats scaled up in this study. 2 refs., 25 figs., 6 tabs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5814038
- Report Number(s):
- ORNL/TM-11796; ON: DE91013268
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM ALLOYS
CREEP
TENSILE PROPERTIES
CHROMIUM ALLOYS
IRON BASE ALLOYS
NIOBIUM ALLOYS
ALUMINIUM OXIDES
CORROSION RESISTANCE
CRUCIBLES
DUCTILITY
MAGNESIUM OXIDES
MELTING
MICROSTRUCTURE
PROCESSING
SULFIDATION
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
IRON ALLOYS
MAGNESIUM COMPOUNDS
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
360103* - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion