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Ordered iron aluminide alloys having an improved room-temperature ductility and method thereof

Patent ·
OSTI ID:868147
 [1]
  1. Clinton, TN
+ Show Author Affiliations
A process is disclosed for improving the room temperature ductility and strength of iron aluminide intermetallic alloys. The process involves thermomechanically working an iron aluminide alloy by means which produce an elongated grain structure. The worked alloy is then heated at a temperature in the range of about 650.degree. C. to about 800.degree. C. to produce a B2-type crystal structure. The alloy is rapidly cooled in a moisture free atmosphere to retain the B2-type crystal structure at room temperature, thus providing an alloy having improved room temperature ductility and strength.
Research Organization:
LOCKHEED MARTIN ENRGY SYST INC
DOE Contract Number:
AC05-84OR21400
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
Patent Number(s):
US 5084109
OSTI ID:
868147
Country of Publication:
United States
Language:
English

References (5)

Fabrication and mechanical properties of Fe sub 3 Al-based iron aluminides report March 1990
16 Percent Aluminum‐Iron Alloy Cold Rolled in the Order‐Disorder Temperature Range journal March 1954
Tensile flow and fracture behavior of DO3 Fe-25 at. pct Al and Fe-31 at. pct al alloys journal February 1987
An environmental effect as the major cause for room-temperature embrittlement in FeAl journal June 1989
Effect of chromium on room temperature ductility and fracture mode in Fe3Al journal October 1988

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Related Subjects

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