Features of duplex microstructural evolution and mechanical behavior in the titanium alloy processed by equal-channel angular pressing
Features of duplex microstructural evolution and mechanical behavior in the titanium alloy processed by equal-channel angular pressing
This report describes a study of the regularities in the kinetics of microstructure evolution and recrystallization processes in the Ti5.7Al3.8Mo1.2Zr1.3Sn alloy (Russian analogue VT8M-1) during processing by equal-channel angular pressing (ECAP). To produce a duplex (globular-lamellar) structure, the billets were subjected to preliminary heat treatment, including water-quenching from a temperature below the β-transus followed by annealing at 700ºС. For the ECAP temperature selection, the deformation behavior of the alloy with a duplex structure was investigated under upsetting in the temperature range of 650-800ºС. The evolution of the globular and lamellar fractions was examined during ECAP processing, and an emphasis was placed on the role of phase transformations, dynamic recrystallization and spheroidization of the α-phase which is realized with increasing accumulated strain when processing by ECAP. It is demonstrated that after 6 ECAP passes an equiaxed ultrafine-grained structure is formed with a mean α-phase grain/subgrain size of ~0.6 µm. The investigation includes an examination of the effect of microstructure on the mechanical properties of the alloy.
1-11
Semenova, Irina P.
1657aa64-fd27-41ad-8f11-de392bbf3eaf
Dyakonov, Grigory S.
f6df7398-6513-45f5-bc31-c175208a0c52
Raab, Georgy I.
27e23b0b-afdd-4171-8a1a-6c74e216b248
Grishina, Yulia F.
3acd72a2-f6f0-4e94-96a7-5000ce405eb5
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
29 August 2018
Semenova, Irina P.
1657aa64-fd27-41ad-8f11-de392bbf3eaf
Dyakonov, Grigory S.
f6df7398-6513-45f5-bc31-c175208a0c52
Raab, Georgy I.
27e23b0b-afdd-4171-8a1a-6c74e216b248
Grishina, Yulia F.
3acd72a2-f6f0-4e94-96a7-5000ce405eb5
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Semenova, Irina P., Dyakonov, Grigory S., Raab, Georgy I., Grishina, Yulia F., Huang, Yi and Langdon, Terence G.
(2018)
Features of duplex microstructural evolution and mechanical behavior in the titanium alloy processed by equal-channel angular pressing.
Advanced Engineering Materials, 20 (8), , [1700813].
(doi:10.1002/adem.201700813).
Abstract
This report describes a study of the regularities in the kinetics of microstructure evolution and recrystallization processes in the Ti5.7Al3.8Mo1.2Zr1.3Sn alloy (Russian analogue VT8M-1) during processing by equal-channel angular pressing (ECAP). To produce a duplex (globular-lamellar) structure, the billets were subjected to preliminary heat treatment, including water-quenching from a temperature below the β-transus followed by annealing at 700ºС. For the ECAP temperature selection, the deformation behavior of the alloy with a duplex structure was investigated under upsetting in the temperature range of 650-800ºС. The evolution of the globular and lamellar fractions was examined during ECAP processing, and an emphasis was placed on the role of phase transformations, dynamic recrystallization and spheroidization of the α-phase which is realized with increasing accumulated strain when processing by ECAP. It is demonstrated that after 6 ECAP passes an equiaxed ultrafine-grained structure is formed with a mean α-phase grain/subgrain size of ~0.6 µm. The investigation includes an examination of the effect of microstructure on the mechanical properties of the alloy.
Text
Semenova AEM 2018 accepted manuscript
- Accepted Manuscript
More information
Accepted/In Press date: 9 April 2018
e-pub ahead of print date: 30 April 2018
Published date: 29 August 2018
Identifiers
Local EPrints ID: 419450
URI: http://eprints.soton.ac.uk/id/eprint/419450
ISSN: 1438-1656
PURE UUID: 039909ee-6e59-4dd0-bec5-ae0da9cbcce6
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Date deposited: 12 Apr 2018 16:30
Last modified: 16 Mar 2024 06:27
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Contributors
Author:
Irina P. Semenova
Author:
Grigory S. Dyakonov
Author:
Georgy I. Raab
Author:
Yulia F. Grishina
Author:
Yi Huang
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