A review of the metastable omega phase in beta titanium alloys: the phase transformation mechanisms and its effect on mechanical properties

JA Ballor, T Li, F Prima, CJ Boehlert… - International …, 2023 - journals.sagepub.com
Since its discovery in 1954, the omega (ω) phase in titanium and its alloys has attracted
substantial attention from researchers. The β-to-ω and ω-to-α phase transformations are …

Development of a high strength and high ductility near β-Ti alloy with twinning induced plasticity effect

L Ren, W Xiao, C Ma, R Zheng, L Zhou - Scripta Materialia, 2018 - Elsevier
A multi-alloyed near β-Ti alloy Ti-6Cr-4Mo-2Al-2Sn-1Zr (Ti-64221) with high strength and
high ductility was designed utilizing the d-electron theory combined with molybdenum …

[HTML][HTML] Eliminating porosity defects, promoting equiaxed grains and improving the mechanical properties of additively manufactured Ti-22V-4Al with super-transus …

CH Ng, MJ Bermingham, MS Dargusch - Additive Manufacturing, 2023 - Elsevier
High energy input additive manufacturing (AM) such as wire-based directed energy
deposition technologies are capable of high deposition rates but can result in coarse …

[HTML][HTML] Modelling martensitic transformation in titanium alloys: The influence of temperature and deformation

M Bignon, E Bertrand, F Tancret… - Materialia, 2019 - Elsevier
New theory is presented to describe the occurrence of plasticity-induced transitions in
titanium alloys. The approach is able to predict the composition dependence of …

Enhanced yield strength by fine grain strengthening and TRIP/TWIP effect of metastable β-type Ti-4V-2Mo-2Fe alloy with high ductility

H Lu, H Shi, H Zhang, W Ma, Y Guo, S Liang… - Materials …, 2024 - Elsevier
In this paper, we have obtained metastable β Ti-4V-2Mo-2Fe (at.%) alloys with exceptional
mechanical properties through the control of grain size. The microstructure analysis reveals …

[HTML][HTML] Role of omega phase evolution in plastic deformation of twinning-induced plasticity β Ti–12V–2Fe–1Al alloy

W Wang, X Zhang, W Mei, J Sun - Materials & Design, 2020 - Elsevier
The evolution of the ω phase and its role in plastic deformation in a twinning-induced
plasticity β Ti–12 V–2Fe–1Al alloy aged at 373–573 K have been studied in this work. The …

Phase Transitions in Ti Alloys Driven by the High Pressure Torsion

B Straumal, A Gornakova, G Davdian… - Materials …, 2023 - jstage.jst.go.jp
The high pressure torsion (HPT) of various binary Ti alloys with β-stabilizers (Fe, Co, Ni, Mo,
Nb) was studied. Before HPT, the samples were annealed and contained (i) pure β …

Effect of reverse β-to-ω transformation on twinning and martensitic transformation in a metastable β titanium alloy

JF Xiao, ZH Nie, CW Tan, G Zhou, R Chen… - Materials Science and …, 2019 - Elsevier
A metastable β titanium alloy, Ti–2Al-9.2 Mo–2Fe (wt.%), with athermal ω phase after
quenching has been subjected to high strain rate (∼ 3000 s− 1) compression at ambient …

Enhanced twinning-induced plasticity effect by novel {315} α ″/{332} β correlated deformation twins in a Ti-Nb alloy

X Zhang, W Wang, J Sun, Y Gao… - International Journal of …, 2022 - Elsevier
This paper reports a new {315} α ″type deformation twinning system, in adition to {130}<
310> α ″in a full α ″Ti-23Nb (at.%) alloy. The {315} α ″twins were identified by trace …

Composition design of a novel Ti-6Mo-3.5 Cr-1Zr alloy with high-strength and ultrahigh-ductility

K Chen, Q Fan, J Yao, L Yang, S Xu, W Lei… - Journal of Materials …, 2022 - Elsevier
The strength-elongation to fracture (ε f) trade-off and low strain hardening rate have been a
longstanding dilemma in titanium alloys. In this work, we innovatively manufactured a novel …