Facile route to implement transformation strengthening in titanium alloys

Zhao, G. and Xu, X. and Dye, D. and Rivera-Díaz-del-Castillo, P.E.J. and Petrinic, N. (2022) Facile route to implement transformation strengthening in titanium alloys. Scripta Materialia, 208: 114362. ISSN 1359-6462

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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.

Item Type:
Journal Article
Journal or Publication Title:
Scripta Materialia
Additional Information:
This is the author’s version of a work that was accepted for publication in Scripta Materialia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Scripta Materialia, 208, 2022 DOI: 10.1016/j.scriptamat.2021.114362
Uncontrolled Keywords:
?? twinning-induced plasticitytwinning-induced plasticitieschemical activationmaterials science(all)condensed matter physics ??
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Deposited On:
23 Feb 2022 14:35
Last Modified:
18 May 2024 01:46