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1. (WO2018128746) SYSTEM AND METHODS FOR FABRICATING A COMPONENT BASED ON LOCAL THERMAL CONDUCTIVITY OF A BUILD MATERIAL

Pub. No.:    WO/2018/128746    International Application No.:    PCT/US2017/064993
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Fri Dec 08 00:59:59 CET 2017
IPC: B22F 3/105
B22F 3/00
Applicants: GENERAL ELECTRIC COMPANY
Inventors: MATHEWS, Harry, Kirk Jr.
GRAHAM, Michael, Evans
Title: SYSTEM AND METHODS FOR FABRICATING A COMPONENT BASED ON LOCAL THERMAL CONDUCTIVITY OF A BUILD MATERIAL
Abstract:
An additive manufacturing system includes an excitation energy source for generating a melt pool in a build material based on a build parameter. The system includes a sensing energy source and a first scanning device that directs the sensing energy source across the build material. The build material emits an ambient quantity of electromagnetic radiation prior to being contacted by an energy beam from the sensing energy source, and a sensing quantity of electromagnetic radiation different than the ambient quantity after contact by the energy beam. The system includes an optical system having an optical detector for detecting the sensing quantity of electromagnetic radiation and generating a detection signal in response. A computing device receives the detection signal and generates a control signal in response. The control signal is configured to modify the build parameter based on the sensing quantity of electromagnetic radiation to achieve a desired melt pool characteristic.