Surface electrolytic-plasma polishing of Ti-6Al-4V alloy with ultrafine-grained structure produced by severe plastic deformation

Smyslova, M. K.; Tamindarov, D. R.; Plotnikov, N V; Modina, Iuliia M.; Semenova, Irina P.

doi:10.1088/1757-899x/461/1/012079

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…At energy pulses, probably from microdischarges during PEP, the generation of motion of unstable dislocation clusters occurs, leading to stress relaxation and some softening of the UFG sample surface. Thus, as applied to UFG titanium alloy, PEP can be an independent process for surface treatment, allowing one to achieve high surface quality characteristics that are not attainable by other processing methods [14].…”

Section: Discussionmentioning

confidence: 99%

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Microstructural Features and Surface Hardening of Ultrafine-Grained Ti-6Al-4V Alloy through Plasma Electrolytic Polishing and Nitrogen Ion Implantation

Smyslova

Valiev

Смыслов

et al. 2021

Metals

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This work studies a near-surface layer microstructure in Ti-6Al-4V alloy samples subjected to plasma electrolytic polishing (PEP) and subsequent high-energy ion implantation with nitrogen (II). Samples with a conventional coarse-grained (CG) structure with an average α-phase size of 8 μm and an ultrafine-grained (UFG) structure (α-phase size up to 0.35 μm) produced by equal channel angular pressing were used in the studies. Features of phase composition and substructure in the thin surface layers are shown after sequential processing by PEP and II of both substrates with CG and UFG structures. Irrespective of a substrate structure, the so-called “long-range effect” was observed, which manifested itself in enhanced microhardness to a depth of surface layer up to 40 μm, exceeding the penetration distance of an implanted ion he. The effect of a UFG structure on depth and degree of surface hardening after PEP and ion-implantation is discussed.

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Section: Discussionmentioning

confidence: 99%

“…Before ion implantation, the sample surface was subjected to mechanical polishing and plasma electrolytic polishing to a mirror finish. The details of PEP processing are given in [14]. The ion implantation of the sample surface was carried out on an experimental set with a broadband ion source.…”

Section: Materials and Sample Preparation Proceduresmentioning

confidence: 99%

Microstructural Features and Surface Hardening of Ultrafine-Grained Ti-6Al-4V Alloy through Plasma Electrolytic Polishing and Nitrogen Ion Implantation

Smyslova

Valiev

Смыслов

et al. 2021

Metals

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“…At present, just a few research results have been published in the field of electrolyte plasma polishing, and most of them focus on the research of polishing mechanism and polishable material range [14][15][16]. The existing investigation results also suggest that EPP technology has a great application value in the medical field [17][18][19]. In 2021, Stepputat et al [13,20] studied the polishing effect of EPP technology on additive manufactured parts.…”

Section: Introductionmentioning

confidence: 99%

Spray electrolyte plasma polishing of GH3536 superalloy manufactured by selective laser melting

Wang

Zhao

et al. 2022

Int J Adv Manuf Technol

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The paper deals with the studies on spray electrolyte plasma polishing (SEPP) of the GH3536 superalloy produced by selective laser melting (SLM). The theoretical operation of SEPP is shown. The GH3536 superalloy plate manufactured by SLM is used as the experimental specimen. The regularity of surface roughness on cathode feed velocity is presented. Key parameters, like distance between anode and cathode, voltage, temperature and flow rate of the electrolyte are investigated. The surface roughness, micro morphology and chemical composition of the specimen before and after polishing are detected. SEPP technology is found to decrease the surface roughness from Ra = 13.93 μm to 0.107 μm, and the specimen is smooth and bright without obvious processing traces. The oxides and other impurities on the surface of the specimen are removed, and the contents of Ni, Cr and Fe increase. The SEPP technology proposed in this paper, as a new green and efficient surface finishing technology, has the potential for further development.

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“…[3,10,11] In this work, EPP of the samples was conducted in an electrolyte (low-concentrated 5% aqueous solution of KF and NH 4 F) at an electric current voltage, between the component and an electrolyte, of 320-350 V. The samples were polished at a current density of 0.2-0.5 A dm À2 and temperature of 70-90 C for 5 min. [11] The surface of the components after processing exhibited a high metallic luster. Then, TiVN vacuum-plasma coating was deposited onto the surface of all samples in accordance with the procedure described in earlier works.…”

mentioning

confidence: 99%

“…The calculation was carried out in at least five vision areas, the minimum number of measured grains was 1000. Prior to coating deposition, the surface of samples with the initial coarse‐grained (CG) and UFG structure was subjected to mechanical grinding with further electrolyte‐plasma polishing (EPP), which is used to polish complex‐profile components from titanium alloys and other structural materials . In this work, EPP of the samples was conducted in an electrolyte (low‐concentrated 5% aqueous solution of KF and NH 4 F) at an electric current voltage, between the component and an electrolyte, of 320–350 V. The samples were polished at a current density of 0.2–0.5 A dm −2 and temperature of 70–90 °C for 5 min .…”

mentioning

confidence: 99%

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

et al. 2020

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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.

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Surface electrolytic-plasma polishing of Ti-6Al-4V alloy with ultrafine-grained structure produced by severe plastic deformation

Cited by 15 publications

References 8 publications

Microstructural Features and Surface Hardening of Ultrafine-Grained Ti-6Al-4V Alloy through Plasma Electrolytic Polishing and Nitrogen Ion Implantation

Microstructural Features and Surface Hardening of Ultrafine-Grained Ti-6Al-4V Alloy through Plasma Electrolytic Polishing and Nitrogen Ion Implantation

Spray electrolyte plasma polishing of GH3536 superalloy manufactured by selective laser melting

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

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