MICROSTRUCTURE OF COMMERCIALLY PURE TITANIUM AFTER CRYOGENIC MILLING AND SPARK PLASMA SINTERING

1 KOZLÍK Jiří
Co-authors:
1 HARCUBA Petr 1 STRÁSKÝ Josef 2 CHRÁSKA Tomáš 1 JANEČEK Miloš
Institutions:
1 Charles University, Department of Physics of Materials, Prague, Czech Republic, jiri.kozlik@mff.cuni.cz
2 Czech Academy of Sciences, Institute of Plasma Physics, Prague, Czech Republic, chraskat@ipp.cas.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
1298-1303
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
23 views / 6 downloads
Abstract

Commercially pure titanium was prepared by advanced powder metallurgy methods with the aim to produce the ultra-fine grained material. Cryogenic attritor milling was used as a first step to refine the microstructure at liquid argon temperatures to suppress recovery and dynamic recrystallization. Spark plasma sintering was subsequently employed to produce bulk material, exploiting its ability to achieve fully dense structure in short time and thus to reduce the grain growth. In order to understand the undergoing microstructural changes during the process, detailed investigation was performed after each preparation step. Powder morphology was changed significantly after milling, while particle fragmentation was only limited. Grain size after sintering was in micrometer scale, relatively independent of sintering conditions.

Keywords: Titanium, cryogenic milling, spark plasma sintering, microstructure
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