MATEC Web of Conferences (Jan 2020)

Ti-15Mo alloy prepared by cryogenic milling and spark plasma sintering

  • Terynková A.,
  • Kozlík J.,
  • Bartha K.,
  • Chráska T.,
  • Stráský J.

DOI
https://doi.org/10.1051/matecconf/202032112029
Journal volume & issue
Vol. 321
p. 12029

Abstract

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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.