| Issue |
MATEC Web Conf.
Volume 321, 2020
The 14th World Conference on Titanium (Ti 2019)
|
|
|---|---|---|
| Article Number | 11078 | |
| Number of page(s) | 8 | |
| Section | Microstructure - Properties Relationships | |
| DOI | https://doi.org/10.1051/matecconf/202032111078 | |
| Published online | 12 October 2020 | |
Multi-strengthening-mechanisms in a novel titanium alloy with (TiHf)5Si3 particle-reinforcement
1 Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
2 Xi’an Rare Metal Materials Institute Co. Ltd., Xi’an 710016, China
* Corresponding author, E-mail address: tooru18@hotmail.com
The microstructure and mechanical properties of Ti-2Si-2Nb-2Fe-1Hf-1Ta-1W alloy with (TiHf)5Si3 particle-reinforcement and their underlying relations have been studied. Electron microscope observations and correlative statistical analysis have been made to analyze microstructure evolution with heat treatments. The (TiHf)5Si3 particles with 800 nm in diameter were found uniformly distributed at α/β boundaries and triple junctions and turned out to be stable even after heat treatments at high temperature for a long period, inhibiting grain growth and dislocation motion. In addition, multi-strengthening-mechanisms including particle strengthening, solid-solution strengthening, grain boundary strengthening and dislocation strengthening have been discussed.
Key words: titanium alloy / microstructure / mechanical property / strengthening
© The Authors, published by EDP Sciences, 2020
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