Method for reducing heat treatment residual stresses in...

Details Method for reducing heat treatment residual stresses in... Method for reducing heat treatment residual stresses in...

2006-11-21

2006-11-21

King, Roy (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

With measuring, testing, or sensing

C148S675000

Reexamination Certificate

active

07138020

ABSTRACT:
In accordance with an embodiment of the present invention, a method for reducing residual stress in a nickel-base superalloy article comprising about 40–70% of gamma prime phase and having a gamma prime solvus temperature is disclosed. The method comprises the steps of super-solvus heat treating the superalloy article about 5–40° F. (3–22° C.) above the gamma prime solvus temperature; and holding at the super-solvus heat treatment temperature for about 0.25–2 hours, wherein the heat-treated superalloy article has reduced residual stress.

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