Method for limiting surface recrystallization

摘要

A method to limit surface zone recrystallization in a superalloy article includes limiting recrystallization in a surface zone of a superalloy article by treating the superalloy article in an oxygen-containing environment to introduce oxygen into the surface zone in an amount sufficient to pin any new grain boundaries in the surface zone.

主权项

1. A superalloy article comprising:
a nickel-based superalloy body that has a surface zone, the surface zone including oxygen dopant in an amount sufficient to pin any new grain boundaries in the surface zone that occur under a recrystallization condition of 1080° C./1976° F. for 4 hours, the amount of oxygen dopant being insufficient to produce a continuous oxide scale on the surface of the nickel-based superalloy body.