Journal
JOURNAL OF MATERIALS RESEARCH
Volume 29, Issue 17, Pages 1941-1950Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2014.122
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Funding
- Australian Research Council [DP110101653]
- European Commission [264635]
- Deutsche Forschungsgemeinschaft [SFB/Transregio 79]
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This study presents results of selective laser melting (SLM), powder metallurgy (PM), and casting technologies applied for producing Ti-TiB composites from Ti-TiB2 powder. Diffraction patterns and microstructural investigations reveal that chemical reaction occurred between Ti and TiB2 during all the three processes, leading to the formation of Ti-TiB composites. The ultimate compressive strength of SLM-processed and cast samples are 1421 and 1434 MPa, respectively, whereas the ultimate compressive strengths of PM-processed 25%, 29%, and 36% porous samples are 510, 414, and 310 MPa, respectively. The Young's moduli of porous composite samples are 70, 45, and 23 GPa for 25%, 29%, and 36% porosity levels, respectively, and are lower than those of SLM-processed (145 GPa) and cast (142 GPa) samples. Fracture analysis of the SLM-processed and cast samples shows shear fracture and microcracks across the samples, whereas failure of porous samples occurs due to porosities and weak bonds among particles.
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