Patent ID: 11925985
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  F  Y | IPC B  C  F

Claim 0:
1. A method of making a part, comprising:
forming the part via an additive manufacturing process, wherein the additive manufacturing process comprises layering, melting, and solidifying a metal alloy based on a three dimensional numerical model, wherein the metal alloy is in powder form; wherein the additive manufacturing process comprises layering the metal alloy in solid form, melting the metal alloy, and solidifying the metal alloy,
wherein the metal alloy comprises a nickel alloy, wherein the nickel alloy comprises Inconel 625, Inconel 713, Inconel 718, Inconel 738, Inconel 792, or a combination comprising at least one of the foregoing nickel alloys;
wherein the additive manufacturing process includes laser metal deposition, electron beam metal deposition, or a combination thereof; and
wherein the formed part comprises a microstructure, wherein the microstructure comprises an average columnar grain length; and
heat treating the formed part, wherein heat treating comprises heating to between 750° C. and 1200° C. for a time between 0.5 hours and 10 hours and then cooling the formed part below 750° C.,
wherein after heat treating, the formed part has an average columnar grain length of 400 micrometers to 1000 micrometers, as measured using electron backscattered diffraction.