Development of an ω-phase in grade 2 titanium processed by HPT at high hydrostatic pressure
Development of an ω-phase in grade 2 titanium processed by HPT at high hydrostatic pressure
High-pressure torsion was used to process grade 2 titanium to 10 turns using different pressures up to a maximum of 8 GPa. X ray diffraction showed that the as-received material and the material processed at pressures of 2 GPa and 4 GPa were single phase but the material processed at 8 GPa contained both the h.c.p. and the simple hexagonal ω-phase. Nanoindentation was used to determine the mechanical behavior and the results show a pronounced increase in hardness due both to the severe plastic deformation processing and to the phase transformation at the highest pressure. A maximum hardness of ~4.7 GPa was attained.
1144-1148
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
October 2016
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Figueiredo, Roberto B. and Langdon, Terence G.
(2016)
Development of an ω-phase in grade 2 titanium processed by HPT at high hydrostatic pressure.
Materials Research, 19 (5), .
(doi:10.1590/1980-5373-MR-2016-0403).
Abstract
High-pressure torsion was used to process grade 2 titanium to 10 turns using different pressures up to a maximum of 8 GPa. X ray diffraction showed that the as-received material and the material processed at pressures of 2 GPa and 4 GPa were single phase but the material processed at 8 GPa contained both the h.c.p. and the simple hexagonal ω-phase. Nanoindentation was used to determine the mechanical behavior and the results show a pronounced increase in hardness due both to the severe plastic deformation processing and to the phase transformation at the highest pressure. A maximum hardness of ~4.7 GPa was attained.
Text
Figueiredo-MR-2016-19-1144 (Ti, HPT, omega phase)
- Version of Record
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Accepted/In Press date: 11 August 2016
e-pub ahead of print date: 29 August 2016
Published date: October 2016
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 399942
URI: http://eprints.soton.ac.uk/id/eprint/399942
ISSN: 1516-1439
PURE UUID: 4d7e4098-6d90-4583-95b8-eb2a4b36c803
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Date deposited: 05 Sep 2016 13:21
Last modified: 15 Mar 2024 03:14
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Author:
Roberto B. Figueiredo
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