Accession Number : ADD013043

Title :   Enhanced Microstructural Stability of Nickel Alloys.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Duhl,David N ; Nguyen-Dinh,Xuan

Report Date : 08 Jan 1985

Pagination or Media Count : 5

Abstract : The microstructural stability of nickel base alloys at high temperatures is enhanced by the addition of cobalt within the range of 10.0 to 14.9 weight percent for reducing the precipitation of the sigma phase in alloys with more than 12 weight percent chromium. The nickel-base alloys having cobalt addition in the range as set forth are characterized by an electron vacancy number within the range of 2.4 to 2.7 inclusive.

Descriptors :   *PATENTS, *MICROSTRUCTURE, *STABILITY, *NICKEL ALLOYS, *THERMAL STABILITY, *COBALT, ALLOYS, CHROMIUM, ELECTRONS, HIGH TEMPERATURE, PRECIPITATION, STABILITY, ELECTRON DENSITY, PHASE SHIFT, METALLOGRAPHY, TUNGSTEN ALLOYS, TANTALUM ALLOYS, ALUMINUM ALLOYS, TITANIUM ALLOYS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE