Accession Number : ADD013163

Title :   Fabrication of Hollow, Cored, and Composite Shaped Parts from Selected Alloy Powders.

Descriptive Note : Patent, Filed 2 Jul 86, patented 14 Apr 87,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Goldstein,David

Report Date : 14 Apr 1987

Pagination or Media Count : 6

Abstract : Alloy powder is packed into a mold which comprises a complex-shaped solid graphite inner core and a similarly complex-shaped thin glass outer wall. The mold is evacuated, sealed, and then heated to the alloy sintering temperature, the glass softens and applies an isostatic pressure on the alloy as the alloy particles consolidate. After the consolidation step, the mold and its contents are cooled and the glass and graphite materials are removed from the alloy object. This method is particularly useful for preparing complex fittings of Nitinol shape memory alloys.

Descriptors :   *PATENTS, *ALLOYS, FABRICATION, POWDER METALLURGY, GRAPHITE, GLASS

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE