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Nanocrystalline body-centred cubic beta-titanium alloy processed by high-pressure torsion

Nanocrystalline body-centred cubic beta-titanium alloy processed by high-pressure torsion
Nanocrystalline body-centred cubic beta-titanium alloy processed by high-pressure torsion
Processing by high-pressure torsion at room temperature was employed to achieve a uniform nanostructure in a metastable Ti67.4Nb24.6Zr5Sn3 bcc ? alloy with grains of ?20–60 nm after five turns. By comparison, there was an ultrafine grain structure after equal-channel angular pressing at 903 K. The majority of refined grains were identified as bcc ?-titanium with the presence of a small fraction of orthorhombic ?? martensite. It is proposed that the pronounced grain refinement is facilitated by a stress-/strain-induced ? ? ?? martensitic transformation. However, the presence of a large fraction of ? phase in the high-pressure torsion processed samples is attributed to a reverse ?? ? ? martensitic transformation stimulated by the applied shear stress and the inhibition effect of the nanoscale grains on martensite formation
1662-1667
Xu, Wei
cef87ede-4edd-4bde-a9f8-a4c63e18c418
Wu, Xiaolin
4d89c421-f5a7-4d7e-bf6c-2c16d8ad6ea4
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Stoica, Mihai
c357da29-4f76-4f93-af8b-a44016bbbdd5
Calin, Mariana
2f83b72f-97aa-49d6-89e3-eeb81de64a72
Eckert, Jurgen
64592f06-8c23-48a4-bd57-196824f94a9e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Xia, Kenong
07ef42d9-f9f6-4b04-8a9b-6217795a8498
Xu, Wei
cef87ede-4edd-4bde-a9f8-a4c63e18c418
Wu, Xiaolin
4d89c421-f5a7-4d7e-bf6c-2c16d8ad6ea4
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Stoica, Mihai
c357da29-4f76-4f93-af8b-a44016bbbdd5
Calin, Mariana
2f83b72f-97aa-49d6-89e3-eeb81de64a72
Eckert, Jurgen
64592f06-8c23-48a4-bd57-196824f94a9e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Xia, Kenong
07ef42d9-f9f6-4b04-8a9b-6217795a8498

Xu, Wei, Wu, Xiaolin, Figueiredo, Roberto B., Stoica, Mihai, Calin, Mariana, Eckert, Jurgen, Langdon, Terence G. and Xia, Kenong (1970) Nanocrystalline body-centred cubic beta-titanium alloy processed by high-pressure torsion. International Journal of Materials Research, (12), 1662-1667.

Record type: Article

Abstract

Processing by high-pressure torsion at room temperature was employed to achieve a uniform nanostructure in a metastable Ti67.4Nb24.6Zr5Sn3 bcc ? alloy with grains of ?20–60 nm after five turns. By comparison, there was an ultrafine grain structure after equal-channel angular pressing at 903 K. The majority of refined grains were identified as bcc ?-titanium with the presence of a small fraction of orthorhombic ?? martensite. It is proposed that the pronounced grain refinement is facilitated by a stress-/strain-induced ? ? ?? martensitic transformation. However, the presence of a large fraction of ? phase in the high-pressure torsion processed samples is attributed to a reverse ?? ? ? martensitic transformation stimulated by the applied shear stress and the inhibition effect of the nanoscale grains on martensite formation

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More information

Published date: 1 January 1970
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 72221
URI: https://eprints.soton.ac.uk/id/eprint/72221
PURE UUID: 8ea2abc1-8ee7-4d54-adc2-6e718d4b7ead
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 01 Feb 2010
Last modified: 06 Jun 2018 12:48

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Contributors

Author: Wei Xu
Author: Xiaolin Wu
Author: Roberto B. Figueiredo
Author: Mihai Stoica
Author: Mariana Calin
Author: Jurgen Eckert
Author: Kenong Xia

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