Control of solidification in laser powder bed fusion additive manufacturing using a diode laser fiber array

A method of method of forming or repairing a superalloy article having a columnar or equiaxed or directionally solidified or amorphous or single crystal microstructure includes emitting a plurality of laser beams from selected fibers of a diode laser fiber array corresponding to a pattern of a layer...

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Hauptverfasser: Carter, William Thomas, Zhou, Ning, Yuan, Lang, Duclos, Steven Jude, Jones, Marshall Gordon
Format: Patent
Sprache:eng
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Zusammenfassung:A method of method of forming or repairing a superalloy article having a columnar or equiaxed or directionally solidified or amorphous or single crystal microstructure includes emitting a plurality of laser beams from selected fibers of a diode laser fiber array corresponding to a pattern of a layer of the article onto a powder bed of the superalloy to form a melt pool; and controlling a temperature gradient and a solidification velocity of the melt pool to form the columnar or single crystal microstructure.