Crystallographic Analysis of &amp;alpha; Phase Formation in a Metastable &amp;beta; Ti Alloy

Ohmori, Yasuya; Natsui, Hiroshi; Nakai, Kenta

doi:10.2320/matertrans1989.39.49

Cited by 14 publications

(9 citation statements)

References 21 publications

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“…These relationships have been verified through multiple independent studies [1,12,20,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. A representation of the (1010) ω ||(211) β relationship is shown in Figure 2.…”

Section: Crystal Structure and Orientation Relationshipsmentioning

confidence: 76%

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

Ballor

Prima

et al. 2022

International Materials Reviews

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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 central to β-titanium alloy design, but the transformation mechanisms have been a subject of debate. With new generations of aberration-corrected transmission electron microscopy and atom probe tomography, both the spatial resolution and compositional sensitivity of phase transformation analysis have been rapidly improving. This review provides a detailed assessment of the new understanding gained and related debates in this field enabled by advanced characterization methods. Specifically, new insights into the possibility of a coupled diffusional-displacive component in the β-to-ω transformation and key nucleation driving forces for the ω-assisted α phase formation are discussed. Additionally, the influence of ω phase on the mechanical properties of β-titanium alloys is also reviewed. Finally, a perspective on open questions and future direction for research is discussed.

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Section: Crystal Structure and Orientation Relationshipsmentioning

confidence: 76%

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

Ballor

Prima

et al. 2022

International Materials Reviews

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“…Note that most of the observations fall into this bounded area. The confined double shear version of PTMC was used to calculate the HP in previous studies for an fcc/bct system [5] and for an hcp/bcc system [32]. The numerical results of the HP lies on an ellipse-like curve, but the nature of the curve was not elucidated in the previous studies.…”

Section: General Equations For Hp Normal and Their Applicationsmentioning

confidence: 99%

Application of the O-line model to martensite crystallography

Zhang

2011

Sci. China Technol. Sci.

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The O-line model is usually applied to precipitation crystallography. Its application to investigation of martensite crystallography has received little attention. In this paper, the relationship between O-line model and the prism matching model for martensite crystallography is established. The formulas in the O-line model are applicable to martensite crystallography. Analytical solution of the habit plane corresponding to the minimum shape strain has been derived. A calculation example of {3 10 15} f martensite in a ferrous alloy is provided. While the results are in agreement with the former models for martensite crystallography, the advantage of O-line model is that it offers analytical solutions, facilitating further systematic investigations. habit plane, O-line model, martensite crystallography, PTMC Citation:

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“…phase never precipitated and the laths were ready nucleated, was observed in a commercial phase alloy Ti-10V-2Fe-3Al (by mass%). 13,14) Superelasticity was improved by short time aging at 873 K after solution treatment in the -type Ti16Nb-4.9Sn alloy. 4) These phenomena is probably common in -Ti alloys.…”

Section: Effect Of Aging Conditions On Superelasticitymentioning

confidence: 99%

Effects of Sn Content and Aging Conditions on Superelasticity in Biomedical Ti–Mo–Sn Alloys

et al. 2006

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The effects of Sn content and aging conditions on superelasticity in Ti-Mo-Sn alloys were investigated. Martensitic transformation temperature decreased with an increasing of Sn content. A large superelastic strain of 3.0% was obtained in a solution-treated Ti-5 mol%Mo-5 mol%Sn alloy in the tensile test. The superelasticity in the Ti-5 mol%Mo-5 mol%Sn at room temperature was improved by aging at 873 K for short periods between 180 and 420 s. A specimen aged at 873 K for 300 s exhibited superelasticity with a recovery strain of 3.5% in the tensile test. A recovery strain of 3.0% was consistently achieved in cyclic tensile deformations.

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Crystallographic Analysis of α Phase Formation in a Metastable β Ti Alloy

Cited by 14 publications

References 21 publications

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

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

Application of the O-line model to martensite crystallography

Effects of Sn Content and Aging Conditions on Superelasticity in Biomedical Ti–Mo–Sn Alloys

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Crystallographic Analysis of &alpha; Phase Formation in a Metastable &beta; Ti Alloy

Cited by 14 publications

References 21 publications

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

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

Application of the O-line model to martensite crystallography

Effects of Sn Content and Aging Conditions on Superelasticity in Biomedical Ti&ndash;Mo&ndash;Sn Alloys

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Crystallographic Analysis of α Phase Formation in a Metastable β Ti Alloy

Effects of Sn Content and Aging Conditions on Superelasticity in Biomedical Ti–Mo–Sn Alloys