Version 1
: Received: 6 August 2024 / Approved: 7 August 2024 / Online: 7 August 2024 (07:02:37 CEST)
How to cite:
Bernard, G.; Pejchal, V.; Sereda, O.; Logé, R. E. Carbon-based in-situ Ti-TiC Metal Matrix Composite manufactured by Laser Powder Bed Fusion. Preprints2024, 2024080485. https://doi.org/10.20944/preprints202408.0485.v1
Bernard, G.; Pejchal, V.; Sereda, O.; Logé, R. E. Carbon-based in-situ Ti-TiC Metal Matrix Composite manufactured by Laser Powder Bed Fusion. Preprints 2024, 2024080485. https://doi.org/10.20944/preprints202408.0485.v1
Bernard, G.; Pejchal, V.; Sereda, O.; Logé, R. E. Carbon-based in-situ Ti-TiC Metal Matrix Composite manufactured by Laser Powder Bed Fusion. Preprints2024, 2024080485. https://doi.org/10.20944/preprints202408.0485.v1
APA Style
Bernard, G., Pejchal, V., Sereda, O., & Logé, R. E. (2024). Carbon-based in-situ Ti-TiC Metal Matrix Composite manufactured by Laser Powder Bed Fusion. Preprints. https://doi.org/10.20944/preprints202408.0485.v1
Chicago/Turabian Style
Bernard, G., Olha Sereda and Roland E. Logé. 2024 "Carbon-based in-situ Ti-TiC Metal Matrix Composite manufactured by Laser Powder Bed Fusion" Preprints. https://doi.org/10.20944/preprints202408.0485.v1
Abstract
This study outlines a 3-step production process for Ti-TiC Metal Matrix Composite (MMC) employing powder Mechanical Blending, Laser Powder Bed Fusion (LPBF), and a heat treatment. A TiC fraction of more than 20 vol% was formed in-situ through the reaction of titanium with carbon during the LPBF process. The manufactured MMC pieces showed a record stiffness and fracture strain combination. The LPBF energy density impacted strongly porosity type. The as-built microstructure displayed an homogeneous distribution of sub-stoichiometric TiC dendrites which were fully converted into equiaxed TiC grains during the heat treatment. The TiC C/Ti ratio was found to be close to 0.5, resulting in an effective reinforcement content nearly twice the one expected for stoichiometric TiC, leading to stronger reinforcement. The mechanical analysis revealed a Young’s modulus of up to 149 GPa and an ultimate tensile strength of up to 770 MPa, indicating a 27% and 34% improvement, respectively, compared to commercially pure Titanium produced by LPBF and heat treated in the same conditions. A fracture strain of up to 2.8% was achieved. The combination of in-situ formation of defect-free TiC reinforcement and subsequent heat treatment enables to reach an exceptional ductility, considering the 20 vol% reinforcement content.
Keywords
Metal Matrix Composite; In-situ Composite; Laser Powder Bed Fusion; Titanium; Titanium Carbide; Mechanical Property
Subject
Chemistry and Materials Science, Ceramics and Composites
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
