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Title: 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:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
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
Effect of chromium on room temperature ductility and fracture mode in Fe3Al journal October 1988
Tensile flow and fracture behavior of DO3 Fe-25 at. pct Al and Fe-31 at. pct al alloys journal February 1987
16 Percent Aluminum‐Iron Alloy Cold Rolled in the Order‐Disorder Temperature Range journal March 1954
An environmental effect as the major cause for room-temperature embrittlement in FeAl journal June 1989

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+1 more

Related Subjects

iron
aluminide
alloys
improved
room-temperature
ductility
method
process
disclosed
improving
temperature
strength
intermetallic
involves
thermomechanically
alloy
means
produce
elongated
grain
structure
heated
range
650
degree
800
b2-type
crystal
rapidly
cooled
moisture
free
atmosphere
retain
providing
metallic alloys
metallic alloy
rapidly cooled
intermetallic alloys
intermetallic alloy
aluminide alloys
aluminide alloy
temperature ductility
process involves
crystal structure
iron aluminide
type crystal
grain structure
free atmosphere
aluminide intermetallic
rapidly cool
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