公开(公告)号：US20180066341A1

公开(公告)日：2018-03-08

申请号：US15255383

申请日：2016-09-02

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jon Conrad SCHAEFFER ,  Shan LIU ,  Martin M. MORRA ,  Michael Douglas ARNETT

IPC: C22C19/05 ,  F01D5/28 ,  F01D9/04 ,  F01D25/00

CPC classification number: C22C19/058 ,  C22C19/03 ,  C22C19/05 ,  C22C19/056 ,  C22C19/057 ,  C22C30/00 ,  C22C45/00 ,  C22C45/04 ,  C22F1/10 ,  F01D5/288 ,  F01D9/041 ,  F01D25/005 ,  F05D2240/11 ,  F05D2300/175 ,  F05D2300/611

Abstract: A modified alloy is disclosed including a base alloy composition and an additive gamma prime antioxidant. The base alloy composition includes a concentration of a gamma prime antioxidant less than an effective concentration of the gamma prime antioxidant. The additive gamma prime antioxidant is intermixed with the base alloy composition to form the modified alloy, preferentially segregating to a gamma prime phase of the modified alloy and increasing the concentration of the gamma prime antioxidant to be at least the effective concentration of the gamma prime antioxidant. The effective concentration imparts reduced oxidation susceptibility of the gamma prime phase. An article is disclosed including the modified alloy. A coated article is disclosed including a coating disposed on a surface of an article having the base alloy composition. The coated article includes a reduced stress accelerated gamma prime oxidation static crack growth susceptibility in comparison with the base alloy composition.