Omega phase strengthened 1.2GPa metastable beta titanium alloy with high ductility
Omega phase strengthened 1.2GPa metastable beta titanium alloy with high ductility
This paper provides a novel approach for exploiting ω phase strengthening in a metastable β titanium alloy while retaining high ductility. The addition of 1 wt% Fe into our previously designed Ti-7Mo-3Cr alloy can efficiently control the growth of ω phase following air-cooling, resulting in a ultrahigh yield strength (Rp0.2of 1210 MPa) with large ductility (εf of 0.15). Microstructural analysis of deformed alloys showed that the growth of ω phase in the air-cooled Ti-7Mo-3Cr-1Fe alloy modified the deformation mechanism from {332} twinning and dislocation slip, in the water-quenched alloy, to localized dislocation plasticity in ω-void channels.
Metastable beta titanium alloy, omega phase, Strengthening, Yield strength
77-81
Gao, Junheng
ff08c8df-b051-4ab1-bc03-3b6d68ab9d2e
Knowles, Alexander J.
f71ef220-af95-45a3-a103-1385e1ac0d6f
Guan, Dikai
d20c4acc-342a-43fa-a204-7283f0cc33bf
Rainforth, W. Mark
7226983c-4ca1-4f0a-8191-02e3424dc98f
15 March 2019
Gao, Junheng
ff08c8df-b051-4ab1-bc03-3b6d68ab9d2e
Knowles, Alexander J.
f71ef220-af95-45a3-a103-1385e1ac0d6f
Guan, Dikai
d20c4acc-342a-43fa-a204-7283f0cc33bf
Rainforth, W. Mark
7226983c-4ca1-4f0a-8191-02e3424dc98f
Gao, Junheng, Knowles, Alexander J., Guan, Dikai and Rainforth, W. Mark
(2019)
Omega phase strengthened 1.2GPa metastable beta titanium alloy with high ductility.
Scripta Materialia, 162, .
(doi:10.1016/j.scriptamat.2018.10.043).
Abstract
This paper provides a novel approach for exploiting ω phase strengthening in a metastable β titanium alloy while retaining high ductility. The addition of 1 wt% Fe into our previously designed Ti-7Mo-3Cr alloy can efficiently control the growth of ω phase following air-cooling, resulting in a ultrahigh yield strength (Rp0.2of 1210 MPa) with large ductility (εf of 0.15). Microstructural analysis of deformed alloys showed that the growth of ω phase in the air-cooled Ti-7Mo-3Cr-1Fe alloy modified the deformation mechanism from {332} twinning and dislocation slip, in the water-quenched alloy, to localized dislocation plasticity in ω-void channels.
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Published date: 15 March 2019
Keywords:
Metastable beta titanium alloy, omega phase, Strengthening, Yield strength
Identifiers
Local EPrints ID: 475019
URI: http://eprints.soton.ac.uk/id/eprint/475019
ISSN: 1359-6462
PURE UUID: ce6c0403-592e-4e6f-b0b3-58772f382a0a
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Date deposited: 08 Mar 2023 17:55
Last modified: 17 Mar 2024 04:17
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Contributors
Author:
Junheng Gao
Author:
Alexander J. Knowles
Author:
Dikai Guan
Author:
W. Mark Rainforth
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