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Structural and Mechanical Properties of Ti-Co Alloys Treated by High Pressure Torsion

Straumal, Boris; Korneva, Anna; Kilmametov, Askar; Lityńska-Dobrzyńska, Lidia; Gornakova, Alena; Chulist, Robert; Karpov, Mikhail; Zięba, Paweł

Abstract:
The microstructure and properties of titanium-based alloys can be tailored using severe plastic deformation. The structure and microhardness of Ti–4 wt.% Co alloy have been studied after preliminary annealing and following high pressure torsion (HPT). The Ti–4 wt.% Co alloy has been annealed at 400, 500, and 600 °C, i.e., below the temperature of eutectoid transformation in the Ti–4 wt.% Co system. The amount of Co dissolved in α-Ti increased with increasing annealing temperature. HPT led to the transformation of α-Ti in ω-Ti. After HPT, the amount of ω-phase in the sample annealed at 400 °C was about 80­85%, i.e., higher than in pure titanium (about 40%). However, with increasing temperature of pre-annealing, the portion of ω-phase decreased (60–65% at 500 °C and about 5% at 600 °C). The microhardness of all investigated samples increased with increasing temperature of pre-annealing.

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Verlagsausgabe §
DOI: 10.5445/IR/1000090917
Veröffentlicht am 12.02.2019
Originalveröffentlichung
DOI: 10.3390/ma12030426
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Seitenaufrufe: 16
seit 13.02.2019
Downloads: 16
seit 14.02.2019
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1996-1944
urn:nbn:de:swb:90-909177
KITopen-ID: 1000090917
HGF-Programm 43.22.01 (POF III, LK 01)
Erschienen in Materials
Band 12
Heft 3
Seiten Article no: 426
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 30.01.2019
Schlagworte titanium alloys; high pressure torsion; microhardness
Nachgewiesen in Web of Science
Scopus
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