Dispersion strengthened extruded metal products substantially fr

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making articles of indefinite length

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419 20, 419 19, 419 12, 419 13, 75231, 75234, 75233, C22C 1900

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045992142

ABSTRACT:
Disclosed are extruded dispersion strengthened metallic materials which are substantially free of texture as well as a method for producing such materials. The method comprises extruding a billet of dispersion strengthened metallic powder material comprised of one or more metals and one or more refractory compounds said powder material having a mean grain size less than about 5 microns and whose grain size is substantially stable at the extrusion conditions, through a die having an internal contour such that the material is subjected to a natural strain rate which is substantially constant as it pass through the die.

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patent: 4376660 (1983-03-01), Amin
Powder Metallurgy of Superalloys, G. H. Gessinger.
"Superplasticity: Prerequisites and Phenomenology" by Wadsworth, Oyama and Sherby, Interamerican Conference on Materials Technology, Aug. 12-15 (1980).

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