Method for imparting strength and ductility to intermetallic pha

Details Method for imparting strength and ductility to intermetallic pha Method for imparting strength and ductility to intermetallic pha

1982-11-29

1984-10-23

Rutledge, L. Dewayne

Alloys or metallic compositions

Processes

420460, 420445, 420449, 75 05R, 148429, C22C 1900

Patent

active

044787910

ABSTRACT:
A method for achieving both improved high strength and improved ductility in intermediate phases is provided. The method, briefly stated, comprises the steps of providing a melt whose composition substantially corresponds to that of a preselected intermetallic phase having a crystal structure of the L1.sub.2 type, such as nickel aluminide, modified with from about 0.01 to 2.5 atomic percent boron, and rapidly solidifying the melt at a cooling rate of at least about 10.sup.3 .degree. C./second to form a solid body, the principal phase of which is of the L1.sub.2 type crystal structure in either its ordered or disordered state.

REFERENCES:
patent: Re28681 (1976-01-01), Baldwin
patent: 3902900 (1975-09-01), Restall
patent: 4126495 (1978-11-01), Ghosh
patent: 4292076 (1981-09-01), Gigliotti
patent: 4359352 (1982-11-01), Ray et al.

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