Studies on hardness, elastic modulus and high temperature oxidation resistance of TiC and TiB2 dispersed titanium aluminide (Ti45Al5Nb0.5Si) composites developed by laser direct energy deposition
Source abstract
Abstract
In this study, TiC (5–10 wt%) and TiB 2 (5–10 wt%) reinforced TiAl (Ti45Al5Nb0.5Si) composites have been developed by laser direct energy deposition (LDED) process. The microstructures of TiAl/TiC and TiAl/TiB 2 composites consist of TiC and TiB 2 particles dispersed in γ and α 2 matrix. The microhardness of the composites is improved from 571 HV to 634–683 HV (for TiC dispersion) and 649–694 HV (for TiB 2 dispersion). The activation energy of cyclic oxidation is increased from 228 kJ/mol (Ti45Al5Nb0.5Si) to 271–301 kJ/mol (TiC dispersion) and 262–296 kJ/mol (TiB 2 additions). The mechanism of oxidation of the composites is established.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · Metal and Thin Film Mechanics · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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