Готові списки джерел за темами / Electrolytic plasma polishing

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Добірка наукової літератури з теми "Electrolytic plasma polishing"

Автор: Grafiati

Опубліковано: 23 вересня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Electrolytic plasma polishing"

Aliakseyeu, Yu G., A. Yu Korolyov, V. S. Niss, A. E. Parshuto, and A. S. Budnitskiy. "ELECTROLYTE-PLASMA POLISHING OF TITANIUM AND NIOBIUM ALLOYS." Science & Technique 17, no. 3 (May 31, 2018): 211–19. http://dx.doi.org/10.21122/2227-1031-2018-17-3-211-219.

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Titanium and niobium alloys are widely used at present in aircraft, nuclear energy, microwave technology, space and ultrasonic technology, as well as in manufacture of medical products. In most cases production technology of such products involves an implementation of a quality polishing surface. Mechanical and electrochemical methods are conventionally used for polishing products made of titanium and niobium alloys. Disadvantages of mechanical methods are low productivity, susceptibility to introduction of foreign particles, difficulties in processing complex geometric shapes. These materials are hard-to-machine for electrochemical technologies and processes of their polishing require the use of toxic electrolytes. Traditionally, electrochemical polishing of titanium and niobium alloys is carried out in acid electrolytes consisting of toxic hydrofluoric (20–25 %), sulfuric nitric and perchloric acids. The disadvantage of such solutions is their high aggressiveness and harmful effects for production personnel and environment. This paper proposes to use fundamentally new developed modes of electrolytic-plasma treatment for electrolyte-plasma polishing and cleaning products of titanium and niobium alloys while using simple electrolyte composition based on an aqueous ammonium fluoride solution providing a significant increase in surface quality that ensures high reflectivity. Due to the use of aqueous electrolyte the technology has a high ecological safety in comparison with traditional electrochemical polishing. The paper presents results of the study pertaining to the effect of titanium and niobium electrolytic-plasma polishing characteristics using the developed mode for productivity, processing efficiency, surface quality, and structure and properties of the surface to be treated. Based on the obtained results, processes of electrolytic-plasma polishing of a number of products made of titanium alloys BT6 (Grade 5), used in medicine and aircraft construction, have been worked out in the paper.

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Aliakseyeu, Yu G., A. Yu Korolyov, and V. S. Niss. "Electrolytic-plasma polishing of cobalt-chromium alloys for medical products." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 64, no. 3 (October 6, 2019): 296–303. http://dx.doi.org/10.29235/1561-8358-2019-64-3-296-303.

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In the manufacture of implants that are subject to increased cyclic loads, cobalt-chromium alloys with high hardness- and wear resistance have recently been widely used. Roughness of working surfaces is one of the most important characteristics of such products. The traditional processes of finishing the surface of cobalt-chromium alloy implants are based on mechanical and electrochemical methods. The disadvantages of mechanical methods are low productivity, susceptibility to the introduction of foreign particles, difficulties in processing of complex geometric shapes. For electrochemical technologies the treated materials are considered intractable, harmful electrolytes, consisting of solutions of acids, are used in the process of polishing. As an alternative to existing methods, it was proposed to use an environmentally safe method of electrolytic-plasma polishing, the main advantage of which is the use of aqueous solutions of salts with a concentration of 3–5 % as electrolytes. According to the results of the technological process, it has been established that at most electrolyte-plasma polishing modes of cobalt-chromium alloys for medical purposes, a relief in the form of a grid of protrusions occurs on the surface, the origin of which can be explained by the heterogeneity of the material structure that occurs at the stage of casting. Moreover, the height of the formed relief protrusions has a direct impact on the amount of surface roughness. As a result of studies, electrolyte-plasma polishing process modes were established, ensuring the formation of a smooth surface without the presence of embossed protrusions, smoothing the microrelief with the removal of scratches resulting from pre-grinding, achieving a low roughness value (Ra 0.057 micron) and a high reflection coefficient (0.7), which fully meets the requirements for the surface of the implants.

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Navickaitė, Kristina, Lucia Ianniciello, Jaka Tušek, Kurt Engelbrecht, Christian R. H. Bahl, Michael Penzel, Klaus Nestler, Falko Böttger-Hiller, and Henning Zeidler. "Plasma Electrolytic Polishing of Nitinol: Investigation of Functional Properties." Materials 14, no. 21 (October 27, 2021): 6450. http://dx.doi.org/10.3390/ma14216450.

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A novel, environmentally friendly, fast, and flexible polishing process for Nitinol parts is presented in this study. Nitinol samples with both superelastic and shape memory properties at room temperature were investigated. The chemical contamination and surface roughness of superelastic Nitinol plates were examined before and after plasma electrolytic polishing. The shift in phase transformation temperature and tensile strength before and after the polishing process were analysed using Nitinol wire with shape memory properties. The obtained experimental results were compared to the data obtained on reference samples examined in the as-received condition. It was found that plasma electrolytic polishing, when the right process parameters are applied, is capable of delivering Nitinol parts with extremely high surface quality. Moreover, it was experimentally proven that plasma electrolytic polishing does not have a negative impact on functionality or mechanical properties of polished parts.

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Su, Facheng, Hsiharng Yang, Wenchieh Wu, and Yukai Chen. "An Electrolyte Life Indicator for Plasma Electrolytic Polishing Optimization." Applied Sciences 12, no. 17 (August 27, 2022): 8594. http://dx.doi.org/10.3390/app12178594.

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This work shows that electrolyte current-density as an indicator can assist in the optimized timing of the addition of the electrolyte to plasma electrolytic polishing (PEP) to keep it active and in operation. In this experiment, 2 wt% ammonium sulfate was used as an electrolyte to polish 1 cm × 1 cm stainless steel SUS304. The hot-bath heating method was successfully used to heat it from 60 to 90 °C, followed by suction filtration. The cathode was fixed at the beaker edge in the electrolyte and the input voltage was 340 volts. Once the gas-phase layer formed stably around the workpiece, the plasma went through the electrolyte to polish the workpiece surface. Then, the anode was slowly immersed into the electrolyte and the current-density measured. It was found that based on the current-density–temperature curve, for the timing of the addition of the electrolyte, the current-density difference could be used to decide whether it needed to be supplemented or not. When the temperature was from 75 to 80 °C and 85 to 90 °C, it was found that the 2 wt% ammonium sulfate solution should be supplemented. The result showed that the electrolyte life indicator, using the current-density, is a feasible method of practical technology for PEP.

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Korolyov, A., A. Bubulis, J. Vėžys, Yu Aliakseyeu, V. Minchenya, V. Niss, and D. Markin. "Electrolytic plasma polishing of NiTi alloy." Mathematical Models in Engineering 7, no. 4 (December 27, 2021): 70–80. http://dx.doi.org/10.21595/mme.2021.22351.

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Chen, H. L., and Y. X. Zhang. "Eco-friendly oxalic acid and citric acid mixed electrolytes using for plasma electrolytic polishing 304 stainless steel." Journal of Physics: Conference Series 2345, no. 1 (September 1, 2022): 012029. http://dx.doi.org/10.1088/1742-6596/2345/1/012029.

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Abstract The traditional of mixed electrolyte of H2SO4 and H3PO4 widely used in electropolishing 304 stainless steel. Due to environmental protection and safety issues, there is an urgent need to develop more environmentally friendly electrolytes. In this study, 304 stainless steel was electropolished by plasma electropolishing using a mixed electrolyte of oxalic acid and citric acid, which are environmentally friendly electrolytes. The mixed electrolyte concentration of oxalic acid and citric acid were 0.01 M, 0.05M, 0.1M, 0.3M and 0.5 M, respectively. The volume mixing percentage is adjusted to about 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8, respectively. Plasma power is about 1.3 kW, electrolysis time is 5 and 1 minutes, respectively. The results show that low-concentration mixed electrolyte, shortened electrolysis time and proper electrolyte mixing ratio, can obtain better surface roughness. The mixing ratio of oxalic acid and citric acid mixed electrolyte, and the factors that may affect the surface roughness of plasma electropolished 304 stainless steel, will be discussed in the text.

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Tamindarov, D. R., A. M. Smyslov, and A. V. Sidelnikov. "Influence of electrolyte composition on the process of electrolytic-plasma polishing of titanium alloys." Physics and Chemistry of Materials Treatment 5 (2022): 31–38. http://dx.doi.org/10.30791/0015-3214-2022-5-31-38.

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Electrolyte-plasma polishing (EPP), also known as electrolyte-plasma treatment (EPT) has become widespread in industry as an alternative to traditional chemical, electrochemical and mechanical methods of improving the surface quality of products made of metallic materials. EPP is an innovative technology used to obtain metal surfaces with low roughness and a high gloss. Electrolyte-plasma polishing is widely used in aerospace, biomedical, precision instrumentation and other. This work is devoted to the study of the effect of the electrolyte composition on achieving the effect of polishing titanium alloys during the implementation of the EPP process. The studies were carried out on the example of polishing a titanium alloy VT6 (Ti – 6 Al – 4 V) in a three-component aqueous electrolyte containing NaF, NH2OH·HCl and KCl. It was shown that, depending on the concentration ratio of NaF and NH2OH·HCl protolyte salts, either the formation of oxide films or their anodic dissolution in the presence of a ligand can be observed on the treated surface, with the production of a clean, non-anodized metal surface, accompanied by a decrease in roughness (polishing effect). It is established that the polishing effect is achieved at a certain ratio of NaF and NH2OH·HCl, which ensures the formation of hydrogen fluoride in it in an amount sufficient to dissolve the oxide films formed on the treated surface.

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Navickaitė, Kristina, Karl Roßmann, Klaus Nestler, Falko Böttger-Hiller, Michael Penzel, Thomas Grund, Thomas Lampke, and Henning Zeidler. "Plasma Electrolytic Polishing of Porous Nitinol Structures." Plasma 5, no. 4 (November 30, 2022): 555–68. http://dx.doi.org/10.3390/plasma5040039.

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In this study, for the first time, the application of plasma electrolytic polishing (PEP) of porous Nitinol structures, mimicking a trabecular bone structure, that were additively manufactured, is reported. The cube-shaped samples were polished in a diagonal position three different times. The effect of PEP was evaluated in terms of the polishing depth, the effect on sample chemical composition and a possible shift of the phase transition temperature using microscopy, the energy dispersive X-ray spectroscopy (EDX), and the differential scanning calorimetry (DSC) techniques, respectively. The obtained results demonstrated that the PEP technique is suitable for polishing porous structures up to a certain depth into the sample inner structure and does not have any influence on the chemical composition and the phase transformation temperatures. However, small changes in the specific enthalpy were observable among the investigated samples. These changes could be attributed to the sample chemical inhomogeneity, measurement error, and/or differences in sample size and shape.

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Böttger-Hiller, Falko, Klaus Nestler, Henning Zeidler, Gunther Glowa, and Thomas Lampke. "Plasma electrolytic polishing of metalized carbon fibers." AIMS Materials Science 3, no. 1 (2016): 260–69. http://dx.doi.org/10.3934/matersci.2016.1.260.

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Cornelsen, Matthias, Carolin Deutsch, and Hermann Seitz. "Electrolytic Plasma Polishing of Pipe Inner Surfaces." Metals 8, no. 1 (December 29, 2017): 12. http://dx.doi.org/10.3390/met8010012.

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Більше джерел

Дисертації з теми "Electrolytic plasma polishing"

Rajput, Ajeet Singh, Henning Zeidler, and Andreas Schubert. "Analysis of voltage and current during the Plasma electrolytic Polishing of stainless steel." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-227115.

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Plasma electrolytic Polishing (PeP) is a non-conventional technology for the surface treatment of electrically conductive materials. It is an effective machining technique for cleaning and polishing of metals and considered as a more environmentally friendly alternative to the electropolishing process. The electropolishing process uses aggressive media such as acids, whereas in PeP, acids or toxicants are replaced by low concentrated water solutions of various salts. In PeP, high DC voltage is applied to the electrodes in the aqueous electrolyte solution, which establishes a thin steam-gas layer around the surface of the work piece resulting in the generation of plasma. From the previous research, it is found that the formation of stable plasma generally takes place between 180-370 volts, where it results in better surface conditions. The aim of this study is to analyse the behaviour of current according to different voltages and their effects on surface roughness and material removal rate (MRR) of stainless steel in Plasma electrolytic Polishing process.

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Spica, Anthony. "Etude du polissage électrolytique plasma de pièces en AS7G06 issues de la fabrication additive." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30319.

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La fabrication additive (FA) est une technologie d’élaboration et de mise en forme actuellement en plein développement dans le domaine des matériaux métalliques. Toutefois, à la fin du processus de fabrication, les surfaces des pièces métalliques ont typiquement une rugosité élevée (Sa = 20 µm), associée notamment à la présence en surface de particules partiellement fondues, qui peuvent en outre se détacher ultérieurement. Cet état de surface est dommageable car il peut entraîner un risque de corrosion et une diminution de la tenue en fatigue de la pièce. De plus, de nombreuses applications nécessitent des états de surface rigoureusement contrôlés, du point de vue de la rugosité et de l’esthétique. Il est donc important, après FA d’une pièce, de procéder à des traitements de parachèvement de la surface, notamment de polissage, qui peuvent être usuellement chimiques ou électrochimiques. Ces travaux de thèse ont pour objectif l’étude du polissage électrolytique plasma (PeP), qui est un nouveau procédé jusqu’alors peu étudié, en particulier sur les alliages d’aluminium et sur les pièces issues de FA. Cette nouvelle technologie est basée sur la formation, autour de la surface du substrat, d’une couche diélectrique mince, constituée d’une fine gaine de vapeur issue de l’échauffement local par effet joule de l’électrolyte aqueux au voisinage de la pièce métallique. Deux substrats d’aluminium ont été étudiés : le premier est un alliage d’aluminium 1050 (99,5 % de pureté) qui sert de référence. Le second, est un alliage d’aluminium AS7G06 issu de FA. Ces travaux ont notamment permis de corréler les paramètres opératoires du procédé (tension, durée, électrolyte) aux caractéristiques de surface (rugosité, brillance) après traitement. Il a été ainsi montré que la tension et la profondeur d’immersion de la pièce sont des paramètres qui ont un impact significatif sur les performances de polissage. L’étude du bain électrolytique a également permis de montrer l’importance de sa température et de sa composition (initiale et au cours du temps) sur l’abattement de la rugosité. En conclusion, ces travaux ont permis, pour la première fois et avec succès, de mettre en œuvre le procédé PeP sur alliage d’aluminium AS7G06 mis en forme par FA. L’optimisation des paramètres opératoires du procédé permet à présent d’en réduire la rugosité globale jusqu’à 87%, et ce en seulement quelques minutes
Additive manufacturing (AM) is an elaboration technology currently under rapid development in the field of metallic materials. However, at the end of the manufacturing process, the resulting metallic surfaces show typically a high roughness (Sa = 20 µm), which is associated in particular with the presence of partially melted particles on the surface, that can also detach themselves later. This surface condition is damaging because it leads to a risk of corrosion and fatigue failure of the part. In addition, many applications require strictly controlled surface finishing in terms of roughness and aesthetics. It is therefore important, after AM of a part, to proceed with surface finishing treatments, particularly polishing, which can usually be chemical or electrochemical. This thesis work focuses on the study of electrolytic plasma polishing (EPP), which is a new process that has not been studied much so far, particularly on aluminium alloys and on parts made by AM. This new technology is based on the formation, around the substrate surface, of a dielectric layer, consisting of a thin vapour sheath resulting from the local heating of the aqueous electrolyte in the vicinity of the metal part, by Joule effect. Two aluminium substrates have been studied here: the first is a 1050 aluminium alloy (99.5% purity) which serves as a reference. The second is an AS7G06 aluminium alloy made by AM. In particular, this work has made it possible to correlate the process operating parameters (voltage, duration, electrolyte) with the surface characteristics (roughness, gloss) after treatment. It was thus shown that voltage and immersion depth of the workpiece are parameters which have a significant impact on the polishing performance. The study of the electrolytic bath also made it possible to show the importance of its temperature and composition (initial and over time) on the roughness reduction. In conclusion, this work made it possible, for the first time and successfully, to implement the EPP process on AS7G06 aluminium alloy made by AM. By optimizing the process operating parameters, it is now possible to reduce the roughness by up to 87% in just a few minutes

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HSIEH, CHIA-HSIU, and 謝嘉修. "Study of Oxide Layer Removal form Hand Tool Steels Using Electrolytic Plasma Polishing." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/vew2m4.

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碩士
國立雲林科技大學
機械工程系
107
This study uses 50BV30 hand tools with chromium boron vanadium alloy steel, was used to high temperature oxidation experiment, oxidation temperature is set at 600 ° C, apply 10 hours, 20 hours, 50 hours, 100 hours of oxidation time respectively, observe the thickness, structure, and type of product formed by the oxide layer of the test piece, and the difference in surface roughness before and after oxidation. Electrolyte plasma polishing technology for oxide removal, since the chromium boron vanadium alloy steel is oxidized at 600 ° C for 100 hours, an oxide layer having a thickness of about 90 μm is formed. after 300 seconds of electrolyte polishing, the oxide cannot be completely removed. but after the electrolyte polishing effect, The porous interior of the oxide is formed into a porous structure.

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Частини книг з теми "Electrolytic plasma polishing"

Radkevich, Mihail Mihailovich, and Ivan Sergeevich Kuzmichev. "Technological Schemes for Elongated Foramen Internal Surface Finishing by Forced Electrolytic-Plasma Polishing." In Advances in Mechanical Engineering, 102–11. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-62062-2_11.

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Danilov, I., S. Quitzke, A. Martin, P. Steinert, M. Zinecker, and A. Schubert. "Influence of Plasma Electrolytic Polishing on Surface Roughness of Steel, Aluminum and Cemented Carbide." In Lecture Notes in Production Engineering, 265–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78424-9_30.

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Zakharov, Sergey V., and Mikhail T. Korotkikh. "Electrolyte-Plasma Polishing Ionization Model." In Advances in Mechanical Engineering, 193–208. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39500-1_20.

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Тези доповідей конференцій з теми "Electrolytic plasma polishing"

Henning, Zeidler, and Böttger-Hiller Falko. "Surface Finish of Additively Manufactured Parts using Plasma Electrolytic Polishing." In WCMNM 2018 World Congress on Micro and Nano Manufacturing. Singapore: Research Publishing Services, 2018. http://dx.doi.org/10.3850/978-981-11-2728-1_42.

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Reinhardt, Felix, Falko Böttger-Hiller, Christian Kranhold, Hans-Peter Schulze, Oliver Kröning, Henning Zeidler, and Thomas Lampke. "Surface modification for corrosion resistance of electric conductive metal surfaces with plasma electrolytic polishing." In PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5112652.

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Lin, Chiu-Feng, Zhi-Wen Fan, Hung-Yi Chen, Yu-Kai Chen, Mei-Yi Liu, Tzu-Hung Chen, and Wen-Chieh Wu. "Plasma Electrolytic Polishing Process Mechanism and Application Possibilities Research for Metal Workpiece Surface Finishing." In 2021 7th International Conference on Applied System Innovation (ICASI). IEEE, 2021. http://dx.doi.org/10.1109/icasi52993.2021.9568490.

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Wang, Ji, Xue-mei Zong, Jian-fei Liu, and Sen Feng. "Influence of Voltage on Electrolysis and Plasma Polishing." In 2017 International Conference on Manufacturing Engineering and Intelligent Materials (ICMEIM 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/icmeim-17.2017.3.

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Wang, Ji, Laichun Suo, Yili Fu, and Lili Guan. "Study on material removal rate of electrolysis and plasma polishing." In 2012 International Conference on Information and Automation (ICIA). IEEE, 2012. http://dx.doi.org/10.1109/icinfa.2012.6246913.

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