Ultra-Fine Grained Ti-15Mo Alloy Prepared by Powder Metallurgy

Abstract:

Ti-15Mo alloy belongs to metastable β-Ti alloys that are currently used in aircraft manufacturing and Ti15Mo alloy is a perspective candidate for the use in medicine thanks to its biotolerant composition. In this study, Ti15Mo alloy was prepared by advanced techniques of powder metallurgy. The powder of gas atomized Ti-15Mo alloy was subjected to cryogenic milling to achieve ultra-fine grained microstructure within the powder particles. Powder was subsequently compacted using spark plasma sintering (SPS). The effect of cryogenic milling on the microstructure and phase composition of final bulk material after SPS was studied by scanning electron microscopy. Sintering at 750°C was not sufficient for achieving full density in gas atomized powder, while milled material could be successfully sintered at this temperature. Alpha phase particles precipitated during sintering and their size, as well as the size of beta matrix grains, was strongly affected by the sintering temperature.

• Periodical: Materials Science Forum (Volume 941)
• Pages: 1276-1281
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.941.1276
• Online since: December 2018
• Authors: Anna Veverková*, Jiří Kozlík, Kristína Bartha, Tomáš Chráska, Josef Stráský
• Keywords: Cryogenic Milling, Metastable Beta Titanium Alloys, Powder Metallurgy, Spark Plasma Sintering

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