Alloy Ti–3Al–2.5V Hot-Extruded Pipe Metal Structure and Properties

Pyshmintsev, I. Yu.; Kosmatskii, Ya. I.; Filyaeva, E. A.; Илларионов, А. Г.; Водолазский, Ф. В.; Баранникова, Н. А.

doi:10.1007/s11015-018-0671-5

Cited by 10 publications

(5 citation statements)

References 1 publication

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“…Works [18,19] showed that the formation of a similar texture {110}TD<001>ED during hot deformation of electrical steel, which has a bcc lattice, like the β-phase in titanium alloys. In addition, the formation of a similar texture of the α -phase was observed during hot extrusion of Gr9 and Ti-0.4Al alloys [20,21]. The obtained level of VT23 alloy strength is in good agreement with the data of mechanical tests available for the alloy [22], obtained upon cooling from the β-region at a rate in the range of 0.4-1 °/sec (1000-1150 MPa).…”

Section: Resultssupporting

confidence: 82%

Microstructure, Phase Composition, Physical and Mechanical Properties of Titanium Alloy VT23 Hot-Extruded Tube

Vodolazskiy

Илларионов

Shirinkina

2021

DDF

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Macro-, microstructural, fine structure, phase composition, texture and complex of physical and mechanical properties in titanium alloy VT23 (Ti-5.5Al-4.7V-2.5Mo-1.1Cr-0.7Fe, wt. %) tube were studded by the macroanalysis, optical and transmission microscopy, X-ray phase analysis, durometry and microindentation methods. A close relationship between the structural-textural-phase state formed during the extrusion and the obtained level of strength, plastic, durometric properties and the contact modulus of elasticity in a hot-extruded tube has been established.

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Section: Resultssupporting

confidence: 82%

Microstructure, Phase Composition, Physical and Mechanical Properties of Titanium Alloy VT23 Hot-Extruded Tube

Vodolazskiy

Илларионов

Shirinkina

2021

DDF

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“…Analysis of the IPF showed that the texture is uniform over the section and it contains two main components of the tangential prism (0001)TD<1010>ED and (0001)TD<11 2 0>ED. The formation of the component (0001)TD<1010>ED is associated with the process of deformation of the α-phase and is characteristic for hot extrusion at temperatures of the α-phase range of tubes of alloys based on the α-phase [19,20]. The second textural component (0001)TD<11 2 0>ED is usually formed from the first "deformation" component (0001)TD<1010>ED in technically pure titanium (which chemical composition close to the PT-1M alloy) due to the recrystallization [21].…”

Section: Resultsmentioning

confidence: 99%

Structure, Texture and Mechanical Properties through the Section of the Hot-Extruded Tube of Titanium Alloy PT-1M

Vodolazskiy

Баранникова

Илларионов

2020

MSF

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The study considers the formation of the structure, texture, and hardness of hot extruded tube of titanium alloy PT-1M. It is shown that hot extrusion at 840 °C, which is higher than the α-phase recrystallization temperature, results to the development of dynamic and primary recrystallization processes and ensures the formation of homogeneous and fine-grained structure through-out the cross section with a two-component tangential texture (0001)TD<100>ED+(0001)TD<110>ED (TD – tangential direction, ED – extrusion direction) and hardness of 155 HV. It has been established that a higher cooling rate of the surface areas of the tube after extrusion results to a less active development of recrystallization processes, which lead to the formation of a finer granular structure near the outer surface. This weakens recrystallization component of (0001)TD<110>ED, compared to other areas of the tube.

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“…The PT-3V alloy is an analog of Grade 9 alloy (Ti -(2.5-3.5)%Al-(2-3)%V) but differs from this one by an increased Al content. The bars of alloy of 20 mm in diameter were made by Chepetsky Mechanical Plant Co. by hot deformation with gradual reduction of temperature from the β-phase range to the (α+β)-one (see [62][63][64]). The chemical composition of the alloy is presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The heating rate Vh varied from 10 to 350 о С/min, the applied uniaxial stress P changed from 50 to 100 MPa, the processing time varied from 0 to 90 min. The welding temperature T ranged from 600 to 1140 о C: the welding was performed in the α-region (Т = 600 о C), near the boundary of the α-β phase transition for the Ti-Al-V alloys (Т = 700 о C), in the beginning of the two-phase α+βregion (T = 800 о C), and in the region of stable β-phase (Т = 1030, 1140 о C) (see [62][63][64]). The accuracy of temperature control was  10 о С. Welding was performed in vacuum (6 Pa).…”

Section: Methodsmentioning

confidence: 99%

Corrosion Resistance of the Welded Joints From the Ultrafine-Grained Near-α Titanium Alloys Ti-5Al-2V Obtained by Spark Plasma Sintering

Чувильдеев¹,

Нохрин²,

Likhnitskii³

et al. 2023

Preprint

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A diffusion welding of coarse-grained and ultrafine-grained (UFG) specimens of titanium near-α alloy Ti-5Al-2V used in nuclear power engineering was made by Spark Plasma Sintering. The failure of the welded specimens in the conditions of hot salt corrosion and of electrochemical corrosion were shown to have preferentially intercrystalline character. In the case of presence of macrodefects, crevice corrosion of the welded joints was observed. The resistance of the alloys against the intercrystalline corrosion was found to be determined by the concentration of vanadium at the titanium grain boundaries, by the size and volume fraction of the β-phase particles and by the presence of micro- and macropores in the welded joints. The specimens of the welded joints of the UFG alloy have higher hardness, hot salt corrosion resistance and the electrochemical corrosion.

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Alloy Ti–3Al–2.5V Hot-Extruded Pipe Metal Structure and Properties

Cited by 10 publications

References 1 publication

Microstructure, Phase Composition, Physical and Mechanical Properties of Titanium Alloy VT23 Hot-Extruded Tube

Microstructure, Phase Composition, Physical and Mechanical Properties of Titanium Alloy VT23 Hot-Extruded Tube

Structure, Texture and Mechanical Properties through the Section of the Hot-Extruded Tube of Titanium Alloy PT-1M

Corrosion Resistance of the Welded Joints From the Ultrafine-Grained Near-α Titanium Alloys Ti-5Al-2V Obtained by Spark Plasma Sintering

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