| Issue |
MATEC Web Conf.
Volume 321, 2020
The 14th World Conference on Titanium (Ti 2019)
|
|
|---|---|---|
| Article Number | 12029 | |
| Number of page(s) | 9 | |
| Section | Microstructure Evolution | |
| DOI | https://doi.org/10.1051/matecconf/202032112029 | |
| Published online | 12 October 2020 | |
Ti-15Mo alloy prepared by cryogenic milling and spark plasma sintering
a Department of Physics of Materials, Charles University, Ke Karlovu 5, 12116 Prague, Czech Republic
b Institute of Plasma Physics, Czech Academy of Sciences, Za Slovankou 1782/3, 182 00 Prague, Czech Republic
In this study, Ti-15Mo alloy powder was prepared by gas atomization and subsequent cryogenic milling in order to achieve ultra-fine grained microstructure. Both milled and non-milled powders were compacted by spark plasma sintering (SPS) at temperature of 800 °C for different sintering times up to 6 minutes. Sintering temperature and time affect porosity, microstructure and phase composition of the alloy. Milled powder can be sintered at comparatively lower temperature to achieve fully dense material. Sintering below β-transus temperature results in α+β-structure. Furthermore, amount of α-phase is higher in the material sintered from the milled powder due to increased oxygen content and also due to refined microstructure which facilitates α-phase precipitation. Mechanical properties are also affected by formation of ω-phase during uncontrolled cooling in the SPS machine.
© The Authors, published by EDP Sciences, 2020
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