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

Sikka, Vinod K

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

Abstract

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:

Sikka, Vinod K ^[1]

Clinton, TN

Issue Date:: 1992-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 868147

Patent Number(s):: 5084109

Assignee:: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)

Patent Classifications (CPCs):: C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS

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C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C21D8/005 - {of ferrous alloys

C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
C22C38/06 - containing aluminium

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DOE Contract Number:: AC05-84OR21400

Resource Type:: Patent

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/

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                    Sikka, Vinod K. Ordered iron aluminide alloys having an improved room-temperature ductility and method thereof.  United States: N. p., 1992. 
        Web.

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                    Sikka, Vinod K. Ordered iron aluminide alloys having an improved room-temperature ductility and method thereof.  United States.

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                    Sikka, Vinod K. Wed .  
        "Ordered iron aluminide alloys having an improved room-temperature ductility and method thereof".  United States.  https://www.osti.gov/servlets/purl/868147.

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@article{osti_868147,

  title        = {Ordered iron aluminide alloys having an improved room-temperature ductility and method thereof},

  author       = {Sikka, Vinod K},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1992},

  month        = {1}

}

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Works referenced in this record:

Effect of chromium on room temperature ductility and fracture mode in Fe3Al
journal, October 1988

McKamey, C. G.; Horton, J. A.; Liu, C. T.
Scripta Metallurgica, Vol. 22, Issue 10
https://doi.org/10.1016/S0036-9748(88)80265-5

Tensile flow and fracture behavior of DO3 Fe-25 at. pct Al and Fe-31 at. pct al alloys
journal, February 1987

Mendiratta, M. G.; Ehlers, S. K.; Chatterjee, D. K.
Metallurgical Transactions A, Vol. 18, Issue 2
https://doi.org/10.1007/BF02825709

16 Percent Aluminum‐Iron Alloy Cold Rolled in the Order‐Disorder Temperature Range
journal, March 1954

Nachman, Joseph F.; Buehler, William J.
Journal of Applied Physics, Vol. 25, Issue 3
https://doi.org/10.1063/1.1721631

An environmental effect as the major cause for room-temperature embrittlement in FeAl
journal, June 1989

Liu, C. T.; Lee, E. H.; McKamey, C. G.
Scripta Metallurgica, Vol. 23, Issue 6
https://doi.org/10.1016/0036-9748(89)90263-9

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Similar Records

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

Abstract

Citation Formats

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

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