Mechanical properties and structural features of nanocrystalline titanium produced by cryorolling

A broad spectrum of physicomechanical properties of the VT1-0 nanocrystalline titanium produced by cryomechanical fragmentation of the grain structure using rolling at a temperature close to liquid-nitrogen temperature has been studied. It has been found that the mechanism of grain refinement is ass...

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Bibliographic Details
Published inPhysics of the solid state Vol. 56; no. 8; pp. 1590 - 1596
Main Authors Moskalenko, V. A., Betekhtin, V. I., Kardashev, B. K., Kadomtsev, A. G., Smirnov, A. R., Smolyanets, R. V., Narykova, M. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.08.2014
Springer
Subjects
Mechanical Properties
Physics
Physics and Astronomy
Physics of Strength
Plasticity
Solid State Physics
Titanium
Twins
Nanocrystalline Titanium
Equal Channel Angular Pressing
Nanostructured State
Coherent Scattering Region
High Hydrostatic Pressure Treatment
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Summary:A broad spectrum of physicomechanical properties of the VT1-0 nanocrystalline titanium produced by cryomechanical fragmentation of the grain structure using rolling at a temperature close to liquid-nitrogen temperature has been studied. It has been found that the mechanism of grain refinement is associated with grain fragmentation by twins. Exactly the twin nature of internal interfaces (crystallite boundaries) provides the thermal and structural stability of nanocrystalline titanium produced by cryomechanical grain fragmentation in the temperature range to ∼500 K. It has been assumed that the observed decrease in the titanium density due to cryorolling is associated with a number of factors (high density of introduced dislocations, nanopore formation, and changes in titanium lattice parameters).
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783414080204