Abstract
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.
Highlights
Metal matrix materials (MMCs) are able to combine favorable properties of their components.The resulting mechanical properties of metal matrix composites (MMCs) can even be superior to the properties of each component itself
In order to investigate the impact of different process parameters, a randomized full factorial Design of Experiment (DoE)
(Design of Experiment) experimental plan was created based on the starting parameters
Summary
Metal matrix materials (MMCs) are able to combine favorable properties of their components. The resulting mechanical properties of MMCs can even be superior to the properties of each component itself. Material properties like specific strength, specific stiffness or wear resistance can be improved to a higher level [1,2,3]. Conventional processing methods are often constrained in terms of process control, dispersion control, mechanical properties or shape complexity [4]. The choice of matrix and filler materials is limited.
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