公开(公告)号：US20180057920A1

公开(公告)日：2018-03-01

申请号：US15252783

申请日：2016-08-31

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Martin Matthew MORRA ,  Andrew Joseph DETOR ,  Etienne MARTIN ,  Reza SHARGHI-MOSHTAGHIN

IPC: C22F1/10 ,  C22C19/05 ,  C22C30/00 ,  F01D5/28

CPC classification number: C22F1/10 ,  C21D2211/004 ,  C22C19/03 ,  C22C19/056 ,  C22C30/00 ,  F01D5/28 ,  F05D2240/30 ,  F05D2300/175 ,  F05D2300/608

Abstract: Provided is a method of fabricating an article, including deforming an ingot of a nickel-based superalloy to form an intermediate article, forming a substantially homogeneous dispersion of Laves phase precipitates within the intermediate article, wherein the Laves phase precipitates are present at a concentration of at least about 0.05% by volume and the precipitates have a mean diameter of less than one micron. Also provided is a nickel-based superalloy including a substantially homogeneous dispersion of Laves phase precipitates, wherein the intergranular and transgranular Laves phase precipitates are present at a concentration of at least about 0.1% by volume and wherein the precipitates have a mean diameter of less than one micron. Precipitation of Laves phase may control microstructure during Thermo-mechanical processing and produce superalloys with refined grain size.