Rights statement: 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
Accepted author manuscript, 5.1 MB, PDF document
Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Facile route to implement transformation strengthening in titanium alloys
AU - Zhao, G.
AU - Xu, X.
AU - Dye, D.
AU - Rivera-Díaz-del-Castillo, P.E.J.
AU - Petrinic, N.
N1 - 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
PY - 2022/2/1
Y1 - 2022/2/1
N2 - 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.
AB - 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.
KW - Alloy design
KW - Mechanism-driven modelling
KW - Ti alloys
KW - Transformation strengthening
KW - TRIP/TWIP
KW - Energy efficiency
KW - Molybdenum alloys
KW - Niobium alloys
KW - Plasticity
KW - Strain hardening
KW - Strain rate
KW - Ternary alloys
KW - Titanium alloys
KW - Vanadium alloys
KW - Alloy designs
KW - Energy-efficiency strategies
KW - Mechanism-driven modeling
KW - Metallic material
KW - Titanium (alloys)
KW - Transformation induced plasticity
KW - Transformation-induced plasticity/twinning-induced plasticity
KW - Twinning-induced plasticities
KW - Chemical activation
U2 - 10.1016/j.scriptamat.2021.114362
DO - 10.1016/j.scriptamat.2021.114362
M3 - Journal article
VL - 208
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
M1 - 114362
ER -