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Developing Tungsten-Filled Metal Matrix Composite Materials Using Laser Powder Bed Fusion

: Jäcklein, M.; Pfaff, A.; Hoschke, K.

Volltext ()

Applied Sciences 10 (2020), Nr.24, Art. 8869, 10 S.
ISSN: 2076-3417
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer EMI ()

The additive manufacturing technique laser powder bed fusion (L-PBF) opens up potential to process metal matrix composites (MMCs) with new material pairings free from limitations of conventional production techniques. In this work, we present a study on MMC material development using L-PBF. The generated composite material is composed of an X3NiCoMoTi 18-9-5 steel as matrix and spherical tungsten particles as filler material. A Design of Experiment (DoE)-based process parameter adaption leads to an Archimedean density close to the theoretical density in the case of 60 vol% tungsten content. A maximum ultimate tensile strength of 836 MPa is obtained. A failure analysis reveals a stable bonding of the tungsten particles to the steel matrix. This encourages the investigation of further material combinations. An additional heat treatment of the MMC indicates the potential to design specific material properties; it also highlights the complexity of such treatments.