Iron aluminide alloys with improved properties for high temperature applications
An improved iron aluminide alloy of the DO[sub 3] type is described that has increased room temperature ductility and improved high elevated temperature strength. The alloy system further is resistant to corrosive attack in the environments of advanced energy conversion systems such as those using fossil fuels. The resultant alloy is relatively inexpensive as contrasted to nickel based and high nickel steels currently utilized for structural components. The alloy system consists essentially of 26--30 at. % aluminum, 0.5--10 at. % chromium, 0.02--0.3 at. % boron plus carbon, up to 2 at. % molybdenum, up to 1 at. % niobium, up to 0.5 at. % zirconium, up to 0.1 at. % yttrium, up to 0.5 at. % vanadium and the balance iron. 3 figs.
- DOE Contract Number:
- AC05-84OR21400
- Assignee:
- Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
- Patent Number(s):
- US 4961903; A
- Application Number:
- PPN: US 7-319771
- OSTI ID:
- 7021474
- Resource Relation:
- Patent File Date: 7 Mar 1989
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of iron aluminides for coal conversion systems
Development of nickel-iron aluminides
Related Subjects
ALUMINIUM ALLOYS
CORROSION RESISTANCE
DUCTILITY
THERMODYNAMIC PROPERTIES
CHROMIUM ALLOYS
HEAT RESISTING ALLOYS
IRON BASE ALLOYS
BORON ADDITIONS
CARBON ADDITIONS
MOLYBDENUM ADDITIONS
NIOBIUM ADDITIONS
VANADIUM ADDITIONS
YTTRIUM ADDITIONS
ZIRCONIUM ADDITIONS
ALLOYS
BORON ALLOYS
HEAT RESISTANT MATERIALS
IRON ALLOYS
MATERIALS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
TENSILE PROPERTIES
VANADIUM ALLOYS
YTTRIUM ALLOYS
ZIRCONIUM ALLOYS
360104* - Metals & Alloys- Physical Properties
360105 - Metals & Alloys- Corrosion & Erosion
360103 - Metals & Alloys- Mechanical Properties