Facile route to implement transformation strengthening in titanium alloys
Facile route to implement transformation strengthening in titanium alloys
Developing lighter, stronger and more ductile aerospace metallic materials is in demand for energy efficiency strategies. Alloys with twinning-induced plasticity (TWIP) and/or transformation-induced plasticity (TRIP) effects have been exploited to defeat the conflict of strength versus ductility, yet very few if any physically informed methods exist to address the complex interactions between the transitions. Here we report a facile route to deploy transformation-mediated strengthening in Ti alloys, which particularly focuses on the supervised activation of TRIP and TWIP via a mechanism-driven modelling approach. New alloys were comparatively developed and presented notable resistances to strain localisation, but interestingly through distinct mechanical characteristics. Specifically, extraordinary strain-hardening rate (dσ/dε) with a peak value of 2.4 GPa was achieved in Ti-10Mo-5Nb (wt.%), resulting from the synergetic activation of hierarchical transformations. An efficient model integrating TRIP and TWIP was applied to understand the interplays of the transition mechanisms.
Alloy design, Mechanism-driven modelling, Ti alloys, Transformation strengthening, TRIP/TWIP
Zhao, Guohua
8d907d39-c1fd-42a4-add5-e180343dca3c
Xu, Xin
70c29754-0453-4dc3-950b-640a9ec20f7e
Dye, David
d46698b7-9fec-4f18-a1ba-e4714410f873
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Petrinic, Nik
9c46bbec-0ce2-4639-be53-cf43ea8d7b53
24 October 2021
Zhao, Guohua
8d907d39-c1fd-42a4-add5-e180343dca3c
Xu, Xin
70c29754-0453-4dc3-950b-640a9ec20f7e
Dye, David
d46698b7-9fec-4f18-a1ba-e4714410f873
Rivera-Díaz-del-Castillo, Pedro E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Petrinic, Nik
9c46bbec-0ce2-4639-be53-cf43ea8d7b53
Zhao, Guohua, Xu, Xin, Dye, David, Rivera-Díaz-del-Castillo, Pedro E.J. and Petrinic, Nik
(2021)
Facile route to implement transformation strengthening in titanium alloys.
Scripta Materialia, 208, [114362].
(doi:10.1016/j.scriptamat.2021.114362).
Abstract
Developing lighter, stronger and more ductile aerospace metallic materials is in demand for energy efficiency strategies. Alloys with twinning-induced plasticity (TWIP) and/or transformation-induced plasticity (TRIP) effects have been exploited to defeat the conflict of strength versus ductility, yet very few if any physically informed methods exist to address the complex interactions between the transitions. Here we report a facile route to deploy transformation-mediated strengthening in Ti alloys, which particularly focuses on the supervised activation of TRIP and TWIP via a mechanism-driven modelling approach. New alloys were comparatively developed and presented notable resistances to strain localisation, but interestingly through distinct mechanical characteristics. Specifically, extraordinary strain-hardening rate (dσ/dε) with a peak value of 2.4 GPa was achieved in Ti-10Mo-5Nb (wt.%), resulting from the synergetic activation of hierarchical transformations. An efficient model integrating TRIP and TWIP was applied to understand the interplays of the transition mechanisms.
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Accepted/In Press date: 16 October 2021
e-pub ahead of print date: 24 October 2021
Published date: 24 October 2021
Keywords:
Alloy design, Mechanism-driven modelling, Ti alloys, Transformation strengthening, TRIP/TWIP
Identifiers
Local EPrints ID: 492230
URI: http://eprints.soton.ac.uk/id/eprint/492230
ISSN: 1359-6462
PURE UUID: 111b08b8-5651-491e-b48a-30818a9c0743
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Date deposited: 22 Jul 2024 16:58
Last modified: 23 Jul 2024 02:08
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Contributors
Author:
Guohua Zhao
Author:
Xin Xu
Author:
David Dye
Author:
Pedro E.J. Rivera-Díaz-del-Castillo
Author:
Nik Petrinic
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