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

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.
Inventors:
 [1]
  1. (Clinton, TN)
Issue Date:
OSTI Identifier:
868147
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN) ORNL
Patent Number(s):
US 5084109
Contract Number:
AC05-84OR21400
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
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; /148/