Version 1
: Received: 6 August 2024 / Approved: 7 August 2024 / Online: 7 August 2024 (07:02:37 CEST)
Version 2
: Received: 4 October 2024 / Approved: 5 October 2024 / Online: 7 October 2024 (03:41:47 CEST)
How to cite:
Bernard, G.; Pejchal, V.; Sereda, O.; Logé, R. E. In-Situ Fabrication of Ductile Ti-TiCx Metal Matrix Composite by Laser Powder Bed Fusion with Enhanced Elastic Modulus. Preprints2024, 2024080485. https://doi.org/10.20944/preprints202408.0485.v2
Bernard, G.; Pejchal, V.; Sereda, O.; Logé, R. E. In-Situ Fabrication of Ductile Ti-TiCx Metal Matrix Composite by Laser Powder Bed Fusion with Enhanced Elastic Modulus. Preprints 2024, 2024080485. https://doi.org/10.20944/preprints202408.0485.v2
Bernard, G.; Pejchal, V.; Sereda, O.; Logé, R. E. In-Situ Fabrication of Ductile Ti-TiCx Metal Matrix Composite by Laser Powder Bed Fusion with Enhanced Elastic Modulus. Preprints2024, 2024080485. https://doi.org/10.20944/preprints202408.0485.v2
APA Style
Bernard, G., Pejchal, V., Sereda, O., & Logé, R. E. (2024). In-Situ Fabrication of Ductile Ti-TiCx Metal Matrix Composite by Laser Powder Bed Fusion with Enhanced Elastic Modulus. Preprints. https://doi.org/10.20944/preprints202408.0485.v2
Chicago/Turabian Style
Bernard, G., Olha Sereda and Roland E. Logé. 2024 "In-Situ Fabrication of Ductile Ti-TiCx Metal Matrix Composite by Laser Powder Bed Fusion with Enhanced Elastic Modulus" Preprints. https://doi.org/10.20944/preprints202408.0485.v2
Abstract
The production of high stiffness Ti-based Metal Matrix Composites (Ti-MMCs) displaying significant ductility by additive manufacturing technologies is not yet at the level of conventionally produced Ti-MMCs.This study outlines the production process of stiffness-driven Ti-TiC MMCs displaying a remarkable ductility. The process consists in 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 as-built sub-stoichiometric TiC dendrites are converted in equiaxed TiC grains during the heat treatment. The TiC C/Ti ratio was found to be close to 0.5 in as-built conditions, and 0.7 in heat treated conditions, 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 total elongations of up to 2.8%. The former represents a 27% improvement compared to commercially pure Titanium and the latter exceeds by 115% reported values for LPBF Ti-MMCs with similar Young’s modulus. It is enabled by the in-situ formation of defect-free TiC reinforcements combined with their globularisation through heat treatment.
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.
