ADDITIVE MANUFACTURING METHODS AND APPARATUS FOR FORMING OBJECTS FROM A NICKEL-BASED SUPERALLOY IN A LAYER-BY-LAYER MANNER

ADDITIVE MANUFACTURING METHODS AND APPARATUS FOR FORMING OBJECTS FROM A NICKEL-BASED SUPERALLOY IN A LAYER-BY-LAYER MANNER

An additive manufacturing method wherein an object is formed by selectively solidifying layers of powder with at least one energy beam. The method includes forming the object from a nickel-based superalloy, wherein exposure parameters and an exposure pattern for the at least one energy beam result i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BROCHU, Mathieu, WANG, Xianglong, MATA, Oscar Sanchez, LERMA, Jose Alberto Muniz, ATABAY, Sila Ece
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
CASTING
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:An additive manufacturing method wherein an object is formed by selectively solidifying layers of powder with at least one energy beam. The method includes forming the object from a nickel-based superalloy, wherein exposure parameters and an exposure pattern for the at least one energy beam result in the object having a directionally solidified microstructure with columnar grains aligned with a build direction, perpendicular to the layers. A composition of the nickel-based alloy by weight % may include: 9.3-9.7W, 9.0-9.5Co, 7.5-8.5Cr, 5.4-5.7Al, 3.1-3.3Ta, 1.4-1.6Hf, 0.6-0.9Ti, Mo 0.4-0.6, 007-0.015Zr, 0.01-0.02B with a carbon concentration of around 0.07-0.09 wt % and a balance of Ni.