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Ductile ordered intermetallic alloys.

C T Liu, J O Stiegler

    Science (New York, N.Y.)
    |November 9, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Ordered intermetallic alloys can overcome brittleness for high-temperature applications. Physical metallurgy principles, including alloying and microstructural control, enhance ductility and fabricability.

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    Area of Science:

    • Materials Science
    • Metallurgy
    • High-Temperature Alloys

    Background:

    • Ordered intermetallic alloys offer excellent high-temperature properties but suffer from low ductility and brittle fracture.
    • Embrittlement stems from limited slip systems (bulk brittleness) and weak grain boundaries.

    Purpose of the Study:

    • To demonstrate that the brittleness of ordered intermetallics can be overcome.
    • To explore the potential of these alloys as high-temperature structural materials.

    Main Methods:

    • Alloying processes to improve ductility and fabricability.
    • Microstructural control via rapid solidification and thermomechanical treatments.
    • Application of physical metallurgical principles.

    Main Results:

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    • Substantial improvements in ductility and fabricability observed.
    • Demonstrated success in overcoming brittleness in Ni(3)Al and Ni(3)V-Co(3)V-Fe(3)V alloys.
    • Validation of physical metallurgical principles for enhancing alloy performance.

    Conclusions:

    • The brittleness of ordered intermetallics is not an inherent limitation.
    • These alloys show significant potential for developing new high-temperature structural materials.
    • Further development guided by physical metallurgy principles is promising.