Peculiarities of microstructure and mechanical behavior of VT8M-1 alloy processed by rotary swaging

Modina, Iuliia M.; Polyakov, A.; D’yakonov, G. S.; Yakovleva, T. V.; Рааб, А. Г.; Semenova, Irina P.

doi:10.1088/1757-899x/461/1/012056

Cited by 12 publications

(25 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such a structure was fairly uniform across the cross section of the sample. [9] This may be due to the fact that dynamic recrystallization prevailed in the process of rotational swaging with a higher strain rate whereas static recrystallization was almost suppressed. As a result, this led to the formation of smaller grains and subgrains in the microstructure of the RS-processed billet.…”

Section: Methodsmentioning

confidence: 99%

“…As a result, this led to the formation of smaller grains and subgrains in the microstructure of the RS-processed billet. [9] Architecture and Properties of Vacuum-Plasma Coating: The TiVN coating architecture with a total thickness of about 6 μm consisted of two visible layers (Figure 2a,b) in SEM and a circular polished section in the optical microscope (OM); in addition, there was a V sublayer with a thickness of 0.2 μm, which was deposited directly onto the substrate, as well as a 0.2 μm-thick TiV sublayer between TiVN layers. However, they were slightly visible in the images due to a small thickness.…”

Section: Methodsmentioning

confidence: 99%

“…[4][5][6][7] The aim of this article is the study of the adhesion strength of TiVN protective coating on the selected alloy after the formation of UFG structure in it, using the famous known SPD technique-rotary swaging (RS). [8,9] The titanium alloy VT8M-1 used in this investigation was provided by VSMPO-AVISMA Corporation (Verkhnaya Salda, Russia) with the following composition wt%: Ti-5.7Al-3.8 Mo-1.2Zr-1.3Sn. The b-transus temperature (TPT) in the alloy is 980 AE 5 C. The VT8M-1 alloy rods each having 70 and 1000 mm length were subjected to heat treatment (HT) by heating the alloy to 940 C, subsequent quenching in water, annealing for an hour at 700 C, and cooling in air to obtain a globular-lamellar structure.…”

mentioning

confidence: 99%

“…This procedure is described with more details in a recently published work. [9] The structure of SPD-processed samples was analyzed by a JEOL 6290 scanning electron microscope and JEOL 2100 transmission electron microscope. Thin transmission electron microscopy (TEM) foils were prepared by electrolytic polishing using TenuPol-5 at a negative temperature.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Architecture and Increased Adhesive Strength of Vacuum‐Plasma Coating on Ultrafine‐Grained Titanium Alloy

et al. 2020

View full text Add to dashboard Cite

Herein, the research conducted in the field of vacuum‐plasma coating TiVN deposited on the substrate of VT8M‐1 titanium alloy (Ti–5.7Al–3.8 Mo–1.2Zr–1.3Sn) with an ultrafine‐grained (UFG) structure processed by severe plastic deformation (SPD) is explained. The strength characteristics of deposited coating, layer thickness, chemical composition and adhesive properties on substrates with the initial coarse‐grained (CG) and UFG structures are studied. The influence of substrate UFG structure on increasing the hardness of deposited coating and its adhesive characteristics is established. The nature of enhancing the adhesion strength of the coating depending on the substrate microstructure is discussed.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Architecture and Increased Adhesive Strength of Vacuum‐Plasma Coating on Ultrafine‐Grained Titanium Alloy

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It is well known that during rotary swaging billets are slightly reduced in a gradual manner, which enables to achieve a higher strain degree in the material along with a more homogeneous deforma on of a billet [6]. As a result, an UFG structure is formed in a bulk billet from VT8М-1, which is reported in [7]. The possibility to produce long-sized semi-finished parts suppor ng further shape-genera ng opera ons is another advantage of this technique.…”

Section: Introduc Onmentioning

confidence: 99%

Thermal Stability of Titanium Alloy VT8M-1 with Ultrafine-Grained Structure

et al. 2020

View full text Add to dashboard Cite

The paper considers the effect of a long-duration heating at a service temperature of 450oC on VT8M-1 with a coarse-grained (CG) and ultrafine-grained (UFG) microstructure. A duplex ultrafine-grained microstructure, composed of equiaxed grains of primary α-phase and an ultrafine constituent of α- and β-phases, was processed by thermal treatment and further rotary swaging. This type of a microstructure demonstrates a best combination of strength and ductility at room temperature in comparison with the CG structure. A thermal stability of an UFG state was studied at 450°C for 50, 100, 200, 300, 400, and 500 hours. The evolution of the alloy microstructure against the duration of heating was considered by transmission electronic microscopy (TEM), scanning electronic microscopy (SEM). No increase in the alloy structural elements and strength decrease resulting from a long-term annealing (up to 500 hours) at T=450°C have been observed. This proves a high thermal stability of the UFG structure and mechanical properties of VT8M-1 processed via rotary swaging.

show abstract

Advanced Materials for Mechanical Engineering: Ultrafine‐Grained Alloys with Multilayer Coatings

et al. 2021

View full text Add to dashboard Cite

Research has demonstrated that the formation of a bulk ultrafine‐grained (UFG) structure in metals and alloys through severe plastic deformation (SPD) enables increasing of their strength properties and decreasing of the temperature range of superplasticity. Designers and process engineers generally show a great interest in such materials because the development of mechanical engineering industries places ever‐increasing demands on the performance properties of commercial alloys, especially for parts operating under extreme conditions. One of the approaches for a comprehensive enhancement of the performance characteristics of structural materials is a combination of a UFG structure in the bulk of a material, providing an increase in strength, and an additional surface modification providing resistance to erosion and corrosion damage. As a result, a set of material service properties can be enhanced, which is difficult to achieve through only metal nanostructuring or only surface modification. This approach has been demonstrated through an example of UFG titanium alloys produced by SPD, including those with nanostructured multilayer TiVN coatings of different “architectures.” Accordingly, herein, the trends, problems, and prospects of surface modification for the innovative application of structural UFG titanium alloys in advanced mechanical engineering are examined.

show abstract

Peculiarities of microstructure and mechanical behavior of VT8M-1 alloy processed by rotary swaging

Cited by 12 publications

References 13 publications

Architecture and Increased Adhesive Strength of Vacuum‐Plasma Coating on Ultrafine‐Grained Titanium Alloy

Architecture and Increased Adhesive Strength of Vacuum‐Plasma Coating on Ultrafine‐Grained Titanium Alloy

Thermal Stability of Titanium Alloy VT8M-1 with Ultrafine-Grained Structure

Advanced Materials for Mechanical Engineering: Ultrafine‐Grained Alloys with Multilayer Coatings

Contact Info

Product

Resources

About