LOW DENSITY SINGLE CRYSTAL SUPER ALLOY

Assignee

CANNON-MUSKEGON CORPORATION, A CORP OF MI

Filed

Dec 4, 1984

Granted

Jan 26, 1988

Location

SPRING LAKE MI US

Abstract

A single crystal nickel alloy is provided having many of the foundry and performance characteristics of the higher density, single crystal, nickel base super alloys from which the vanes and blades are cast for high performance turbine aircraft engines. The lower density of this alloy permits its use for rebuilding and upgrading the performance of older turbine aircraft engines of designs which cannot withstand the centrifugal forces generated by the new state of the art higher density single crystal super alloys. The alloy for the first time provides a lower density single crystal alloy capable of heat treatment to stabilize its microstructure for high temperature, high stress use. It also provides for the first time a lower density alloy having acceptable resistance to the effects of high temperature sulfidation, salt corrosion and also to have good coating life. By significant changes in the alloy composition the resulting alloy has creep rupture and stress rupture performance characteristics similar to that of the high density nickel base super alloys while maintaining a density characteristic of equiaxe alloys.

Source: Google Patents