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Title: 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 Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174449
Patent Number(s):
6,607,576
Application Number:
09/172,375
Assignee:
Chrysalis Technologies Incorporated (Richmond, VA) OSTI
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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