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Nanostructuring and Phase Transformations in the β‐Alloy Ti‐15Mo during High‐Pressure Torsion
Author(s) -
Gatina Svetlana,
Semenova Irina,
Leuthold Jörn,
Valiev Ruslan
Publication year - 2015
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500104
Subject(s) - materials science , alloy , torsion (gastropod) , volume fraction , phase (matter) , nanostructure , precipitation , shape memory alloy , diffusionless transformation , titanium alloy , elastic modulus , metallurgy , thermodynamics , composite material , microstructure , martensite , nanotechnology , medicine , chemistry , physics , surgery , organic chemistry , meteorology
In this paper, the processes of grain refinement and phase transformations in the Ti‐15Mo β‐alloy during high‐pressure torsion (HPT) at room temperature are investigated. The non‐monotonic character of the variation of the ω‐phase volume fraction has been demonstrated for an increasing number of turns; in particular, the HPT processing of 1 turn leads to the precipitation of 10% ω‐phase from the β‐matrix, but at 10 turns of HPT a reverse phase transformation is observed. It is shown that nanostructure formation with a minimum content of the ω‐phase allows for achievement of significant strengthening in the alloy while preserving a relatively low elastic modulus.