Alternate method for inducing superplastic properties in nonsupe

Details Alternate method for inducing superplastic properties in nonsupe Alternate method for inducing superplastic properties in nonsupe

1982-03-24

1983-03-08

Stallard, W.

Metal treatment

Compositions

Heat treating

C22F 100

Patent

active

043759947

ABSTRACT:
The invention is a method for inducing superplastic properties in nonsuperplastic metal and metal alloy powders by adding to such powders a small quantity of pure metal capable of alloying with the nonsuperplastic material to form a eutectic having superplastic properties. The powder is initially heated to the melting temperature of the desired eutectic to form the superplastic eutectic at the grain boundaries of the nonsuperplastic material. After forming, the powder is heat soaked to further dissolve the pure metal, destroying the formed eutectic and restoring the natural grain boundaries of the nonsuperplastic material.

REFERENCES:
patent: 3591916 (1971-07-01), Arthur
patent: 3649375 (1972-03-01), Venkatesan
patent: 3862863 (1975-01-01), Gervais et al.
patent: 3997369 (1976-12-01), Grimes et al.

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