Oxidation, carburization and/or sulfidation resistant iron aluminide alloy
Abstract
The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or Zro.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B. .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.
- Inventors:
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1174449
- Patent Number(s):
- 6607576
- Application Number:
- 09/172,375
- Assignee:
- Chrysalis Technologies Incorporated (Richmond, VA)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Sikka, Vinod K., Deevi, Seetharama C., Fleischhauer, Grier S., Hajaligol, Mohammad R., and Lilly, Jr., A. Clifton. Oxidation, carburization and/or sulfidation resistant iron aluminide alloy. United States: N. p., 2003.
Web.
Sikka, Vinod K., Deevi, Seetharama C., Fleischhauer, Grier S., Hajaligol, Mohammad R., & Lilly, Jr., A. Clifton. Oxidation, carburization and/or sulfidation resistant iron aluminide alloy. United States.
Sikka, Vinod K., Deevi, Seetharama C., Fleischhauer, Grier S., Hajaligol, Mohammad R., and Lilly, Jr., A. Clifton. Tue .
"Oxidation, carburization and/or sulfidation resistant iron aluminide alloy". United States. https://www.osti.gov/servlets/purl/1174449.
@article{osti_1174449,
title = {Oxidation, carburization and/or sulfidation resistant iron aluminide alloy},
author = {Sikka, Vinod K. and Deevi, Seetharama C. and Fleischhauer, Grier S. and Hajaligol, Mohammad R. and Lilly, Jr., A. Clifton},
abstractNote = {The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, .ltoreq.1% Cr and either .gtoreq.0.05% Zr or Zro.sub.2 stringers extending perpendicular to an exposed surface of the heating element or .gtoreq.0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Zr, .ltoreq.1% C, .ltoreq.0.1% B. .ltoreq.30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, .ltoreq.1% oxygen, .ltoreq.3% Cu, balance Fe.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {8}
}
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