Mechanical Properties, Phase and Chemical Compositions of a Surface of the Ti–6Al–4V Alloy After Ultrasonic Impact Treatment in Chemically Active and Neutral Mediums

Vasylyev, M. O.; Mordyuk, B.N.; Prokopenko, G.I.; Voloshko, S. М.; Yatsenko, L. P.; Khripta, N. I.

doi:10.15407/mfint.40.08.1029

Cited by 7 publications

(1 citation statement)

References 16 publications

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“…Apart from the polymorphic transformations, changes in the phase composition of the surface layer of the Ti-6Al-4V alloy also happen during UIT. Due to the high reactivity of titanium, the formation of TiO 2 or TiN and Ti 2 N phases was observed in the surface layer of Ti-6Al-4V during UIT at room temperature in air or at cryogenic temperatures in liquid nitrogen correspondingly [12,13]. Other drawbacks of titanium and its alloys which make their mechanical processing difficult are relatively high friction coefficient and strong susceptibility to seizure.…”

Section: Introductionmentioning

confidence: 99%

Transformations of the Microstructure and Phase Compositions of Titanium Alloys during Ultrasonic Impact Treatment Part II: Ti-6Al-4V Titanium Alloy

Панин

Дмитриев

Nikonov

et al. 2022

Metals

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Experimental and theoretical studies enabled the reveal of patterns of the microstructure formation in the surface layer of Ti-6Al-4V titanium alloy subjected to ultrasonic impact treatment. The mixed amorphous and nanocrystalline structure of the 200 nm thick uppermost surface layer of titanium dioxide TiO2 was demonstrated using transmission electron microscopy. The 5 µm thick intermediate layer containing nanocrystalline a grains, and the 50–60 µm thick lower layer containing fragmented a-Ti grains with retained b phase were also observed. The refinement of the β-Ti phase during ultrasonic impact treatment was accompanied by the formation of the orthorhombic (α”) martensitic phase. Molecular dynamics simulation of strains of a vanadium-doped titanium crystallite subjected to ultrasonic impact treatment revealed the formation of striped dislocation substructures as well as the development of reversible b®a phase transformations. Ab initio calculations of the atomic structure of V-doped Ti crystallites containing a, b or a¢¢ phases of titanium were carried out. On the basis of the results of the experimental observations, a molecular dynamics simulation and ab initio calculations a mechanism was proposed, which associated the development of the strain-induced b®a¢¢ phase transformations in Ti-6Al-4V alloy with the presence of oxygen. The role of the electronic subsystem in the development of the strain-induced phase transformations was discussed.

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Section: Introductionmentioning

confidence: 99%

Transformations of the Microstructure and Phase Compositions of Titanium Alloys during Ultrasonic Impact Treatment Part II: Ti-6Al-4V Titanium Alloy

Панин

Дмитриев

Nikonov

et al. 2022

Metals

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The effect of ultrasonic impact treatment on deformation and fracture of electron beam additive manufactured Ti-6Al-4V under uniaxial tension

Panin

Kazachenok

Дмитриев

et al. 2022

Materials Science and Engineering: A

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Synthesis of Composite Coatings by Ultrasonic Impact Treatment of VT6 Titanium Alloy

Mordyuk¹,

Voloshko²,

Burmak³

et al. 2019

Metallofiz. Noveishie Tekhnol.

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Проведено модифікацію поверхневого шару титанового сплаву ВТ6 ультразвуковим ударним обробленням (УЗУО) із додаванням у деформаційну зону порошків α-Si 3 N 4 , β-Si 3 N 4 та Al 2 O 3. Методами рентгеноструктурного фазового аналізу та растрової електронної мікроскопії показано, що за умов інтенсивної пластичної деформації впродовж УЗУО формуються композитні поверхневі шари. Високотемпературне окиснення композитних шарів веде до формування суцільних покриттів. Дані гравіметричного аналізу зразків впродовж циклічного високотемпературного окиснення на повітрі (20 циклів по 5 годин за температури 650°С) показали, що

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Mechanical Properties, Phase and Chemical Compositions of a Surface of the Ti–6Al–4V Alloy After Ultrasonic Impact Treatment in Chemically Active and Neutral Mediums

Cited by 7 publications

References 16 publications

Transformations of the Microstructure and Phase Compositions of Titanium Alloys during Ultrasonic Impact Treatment Part II: Ti-6Al-4V Titanium Alloy

Transformations of the Microstructure and Phase Compositions of Titanium Alloys during Ultrasonic Impact Treatment Part II: Ti-6Al-4V Titanium Alloy

The effect of ultrasonic impact treatment on deformation and fracture of electron beam additive manufactured Ti-6Al-4V under uniaxial tension

Synthesis of Composite Coatings by Ultrasonic Impact Treatment of VT6 Titanium Alloy

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