Gotowe bibliografie tematyczne / Grinding -Alloys

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Gotowa bibliografia na temat „Grinding -Alloys”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Grinding -Alloys"

Niu, Qiu Lin, Guo Giang Guo, Xiao Jiang Cai, Zhi Qiang Liu i Ming Chen. "Analysis of Specific Energy of TC18 and TA19 Titanium Alloys in Surface Grinding". Advanced Materials Research 325 (sierpień 2011): 147–52. http://dx.doi.org/10.4028/www.scientific.net/amr.325.147.

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As two kinds of advanced titanium alloys, TC18 and TA19 were introduced in this paper. The machinabilities of TC18 and TA19 alloys were described in the grinding process. Grinding experiments were completed using green silicon carbide grinding wheel with the coarser 100 grit. Grinding forces and specific energy in surface grinding were investigated. And then, for studying the grinding characteristic, SEM images of the workpiece material were obtained. The results indicated that specific chip formation had the great effect on the mechanism of grinding TC18 and TA19 alloys, and the scratch was the main characteristic of surface grinding. TC18 alloy had the poor grinding performance compared to TA19 alloy.

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Zhang, Hong Xia, Wu Yi Chen, Xiu Zhuo Fu i Li Xia Huang. "Grinding Characteristics and Mechanism of Ceramic Alumina Wheels on Aeronautical Alloys". Advanced Materials Research 591-593 (listopad 2012): 373–76. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.373.

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The present investigation was dedicated to elucidate grinding characteristics during surface grinding of titanium alloy(TC6) and high temperature alloy (GH2132) by using silicon carbide(SiC) and sol-gel (SG) wheel respectively. The grinding characteristic of SG wheel on aeronautical alloys was studied on the base of systematical measurement of the grinding force, grinding temperature, surface roughness and grinding ratio. The results indicated that the SG grinding wheel possesses excellent grinding properties and is more suitable for grinding these aeronautical alloys compared with conventional abrasive tools. Finally, the grinding mechanism of new-typed SG wheel was unveiled on the base of the microcrystalline structure analysis of SG grains.

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Лосев, Е., E. Losev, В. Попов, V. Popov, Д. Лобанов, D. Lobanov, П. Архипов, P. Arkhipov, А. Янюшкин i A. Yanyushkin. "Surface quality of tungstenfree hard alloys after diamond machining". Science intensive technologies in mechanical engineering 1, nr 1 (31.01.2016): 20–24. http://dx.doi.org/10.12737/17318.

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The quality parameters of TN-20 hard alloy after the diamond machining are determined. The technology of combined electro-diamond grinding, which allows resolving the problems of equipment modernization and definition of optimal machining conditions of tungstenfree hard alloys, is developed. The methods of metallographic and spectral analysis, which determined the reasons of low quality of surfaces of tungstenfree hard alloys after abrasive machining, are used. Based on the analysis of the research results, the combined electro-diamond grinding technology for improving the machining performance of parts from tungstenfree hard alloys, is recommended.

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Nosenko, Vladimir A., S. V. Nosenko i V. E. Puzirkova. "Grinding of Titanium Alloys". Key Engineering Materials 887 (maj 2021): 287–93. http://dx.doi.org/10.4028/www.scientific.net/kem.887.287.

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X-ray spectroscopic microanalysis was used to determine the concentration of titanium on the surface of the wear spot of a silicon carbide crystal during micro-scratching and the concentration of silicon on the treated surface after grinding by a wheel of silicon carbide. The wear resistance and grinding coefficient of titanium alloys under micro-scratching with single crystals and grinding with wheels made of corundum, silicon carbide, cubic boron nitride and diamond were determined. The morphology of the treated surface and the regularities of changes in the indicators of the grinding process of titanium alloys with circles of various characteristics were studied. The features of the process of grinding titanium alloys using various lubricants and coolants are shown. The influence of the characteristics of the abrasive tool and grinding modes on low-cycle fatigue on the operation of flat and round grinding of samples made of titanium alloys VT9 and VT22 was studied. The influence of abrasive material, grinding speed, feed and sparkout during finishing on low-cycle fatigue was analyzed. Based on the research, recommendations were given for choosing a rational characteristic of the abrasive tool and processing modes.

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Takahashi, Masatoshi, Masafumi Kikuchi i Yukyo Takada. "Grindability of Ti−Nb−Cu Alloys for Dental Machining Applications". Metals 12, nr 5 (18.05.2022): 861. http://dx.doi.org/10.3390/met12050861.

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We developed high-strength Ti−Nb−Cu alloys and investigated their grindability. The grindability of each alloy was evaluated based on the volume of metal removed per minute (grinding rate) and on the ratio of the metal volume removed to the volume of the wheel material lost (grinding ratio). The grinding rate of the Ti-6%Nb-4%Cu, Ti-18%Nb-2%Cu, and Ti-24%Nb-1%Cu alloys significantly exceeded that of unalloyed titanium at high, medium, and low grinding speeds, respectively. Additionally, the Ti-6%Nb-4%Cu alloy exhibited an excellent grinding ratio. Generally, materials with high strength and hardness frequently exhibit poor machinability; however, the Ti−Nb−Cu alloys developed in our study presented favorable grindability characteristics and, therefore, demonstrated good potential for application as dental titanium alloys that can be subjected to computer-aided design/manufacturing processes.

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Shi, Zhong De, i Helmi Attia. "Feasibility Study on Grinding of Titanium Alloys with Electroplated CBN Wheels". Advanced Materials Research 797 (wrzesień 2013): 73–78. http://dx.doi.org/10.4028/www.scientific.net/amr.797.73.

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An experimental investigation is reported on the grinding of a titanium alloy using electroplated CBN wheels with water-based grinding fluid and wheel surface cleaning fluid applied at high pressures. This work was motivated by applying grinding fluid and wheel surface cleaning fluid both at high pressures for avoiding wheel loading, which is commonly seen in titanium alloy grinding. The objective is to explore the feasibility to grind titanium alloys with electroplated CBN wheels and high pressure wheel surface cleaning fluid for enhancing material removal rates. Straight surface grinding experiments were conducted on titanium alloy blocks in both shallow depth of cut and creep-feed modes. Grinding power, forces, and surface roughness were measured. Specific material removal rates of 8 mm2/s in shallow cut mode and 3 mm2/s at a depth of cut as high as 3 mm in creep-feed mode were achieved without burning and smearing of ground surfaces. It was showed that it is feasible to grind titanium alloys with electroplated CBN wheels at enhanced removal rates by applying grinding and wheel cleaning fluid at high pressures.

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Syreyshchikova, Nelli Vladimirovna, Viktor Ivanovich Guzeev, Dmitrii Valerievich Ardashev, Danil Yurievich Pimenov, Karali Patra, Wojciech Kapłonek i Krzysztof Nadolny. "A Study on the Machinability of Steels and Alloys to Develop Recommendations for Setting Tool Performance Characteristics and Belt Grinding Modes". Materials 13, nr 18 (8.09.2020): 3978. http://dx.doi.org/10.3390/ma13183978.

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This article presents a methodology for designing belt grinding operations with grinding and lapping machines. It provides the results of a study on the machinability of various steels and alloys with belt grinding, which are then classified according to an indicator that we have developed. Namely, cast aluminum alloys, structural alloy steels, structural carbon steels, corrosion-resistant and heat-resistant stainless steels, and heat-resistant nickel alloys have been investigated. The machinability index is the ratio of the performance indicators of the grinding belt and the depth of cut to the indicators of grade 45 structural carbon steels (similar to steel AISI 1045) and similar steels and alloys. The performance indicators of the grinding belt are chosen from a set of calculated and estimated indicators. Experimentally determining the dependences of the performance indicators on the belt grinding modes and conditions, taking into account the established levels of machinability, allowed us to develop recommendations for designing belt grinding operations with grinding and lapping machines. The proposed methodology for designing belt grinding operations guarantees optimal performance and ensures that the necessary quality of the machinable surfaces is achieved. At the same time, it takes into account variable machining conditions, which change within specified limits.

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Okuyama, Shigeki, Akinori Yui i Takayuki Kitajima. "Grinding Performance of a Grain-Arranged Diamond Wheel against Aluminum Alloys and Ti6Al4V". Advanced Materials Research 126-128 (sierpień 2010): 107–12. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.107.

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A grain-arranged diamond wheel was developed and grinding performance of the wheel against aluminum alloys and titanium alloy, Ti6Al4V, has been investigated using various kinds of grinding fluid. Mirror finishing of aluminum alloys was successfully performed without grinding burn when emulsion-type grinding fluid with an extreme-pressure additive was used. When oil base lubricants or a fatty acid was supplied using a MQL supply unit, fine finishing could not be done. Mesh size of the grinding wheel had only a minor effect on surface roughness. When Ti6Al4V was ground by the developed wheel, an adhesion of work material on diamond grains occurred causing the finished surface to deteriorate.

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Syreyshchikova, Nelli Vladimirovna, Danil Yurievich Pimenov, Munish Kumar Gupta, Krzysztof Nadolny, Khaled Giasin i Shubham Sharma. "Establishing the Relationship between Cutting Speed and Output Parameters in Belt Grinding on Steels, Aluminum and Nickel Alloys: Development of Recommendations". Materials 14, nr 8 (15.04.2021): 1974. http://dx.doi.org/10.3390/ma14081974.

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This paper presents the research results of one of the main technological parameters of belt grinding, i.e., the cutting speed while machining corrosion- and heat-resistant, structural carbon and structural alloy steels, aluminum, and heat-resistant nickel alloys. Experimental and analytical methods are used to establish the dependence of the output parameters of surface belt grinding on the cutting speed and tool characteristics. An analytical model, considering the physical and mechanical properties of the grinding belt (strength depending on the base and bond; the thermal conductivity; the type of grinding operation) and the machined material, is created to determine the belt grinding speed. The output parameters, such as the arithmetic mean of the surface roughness (Ra) and the material removal rate (MRR) during the belt grinding of steels, heat-resistant and light alloys, have been studied. Based on the empirical dependencies of the belt grinding parameters, the model was developed for the selection and setting of the cutting speed of belt grinding for the aforementioned alloys, taking into account the type of operation, the type of the machined material, and the main characteristics of the sanding belt.

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Tao, Yi Yi, Jiu Hua Xu i Wen Feng Ding. "A Study on Grinding Performance of Porous NiTi Shape Memory Alloy". Key Engineering Materials 359-360 (listopad 2007): 143–47. http://dx.doi.org/10.4028/www.scientific.net/kem.359-360.143.

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The machining performance of porous NiTi shape memory alloys prepared using powder metallurgical production technique has been investigated experimentally in the grinding operation. Grinding force ratio, specific grinding energy, surface characteristics were detected. The result reveals that, much difference of grinding characteristics exists among three kinds of NiTi alloy because of the pore rate and the mechanical performance induced by TiH2. Under the experimental conditions, the integrated effects of predominant plastic flow and slight brittle fracture were taken for porous NiTi alloy during grinding. Additionally, the grinding parameters should be chosen carefully, otherwise the surface quality deteriorates and even the microcrack perhaps appears.

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Rozprawy doktorskie na temat "Grinding -Alloys"

Wang, S. H. "Investigation into the grinding of titanium alloys". Thesis, Cranfield University, 2000. http://dspace.lib.cranfield.ac.uk/handle/1826/10569.

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Titanium alloys are used extensively in the aerospace industry due to their high specific strength and excellent corrosion resistance. However, their poor thermal conductivity and high chemical reactivity with tool materials make the machining difficult, especially when grinding. During grinding, the excessive heat generated at the wheel-work piece interface may result in poor surface finisil,1_, a transformed surface layer, excessive plastic deformation, thermallyinduced residual tensile stress, burn and micro-cracking on the ground surface. The poor surface integrity and metallurgical changes of the surface and sub-surface may impair the surface sensitive properties such as fatigue life during service. ln order to overcome the thermal problems when grinding titanium alloys, a new cooling strategy, cryogenic grinding, was studied which involves the supply of liquid nitrogen into the grinding zone using a nozzle jet system. lt was found that cryo-cooling with conventional grinding wheel decreased surface roughness values, burn and plastic deformation of Ti-6Al-4V alloys and produced better a cutting mechanism than when using water-based coolant, especially at higher depths of cut. However, the thermal problems still introduced high residual tensile stress which degraded the fatigue life of ground specimens. Another approach to reducing the grinding temperature was to use a superabrasive wheel (diamond), because of its superior thermal conductivity, the integrity of the ground surface was improved and the fatigue life properties of the specimen were maintained at higher values than for conventional grinding wheels. An ultra stiff machine tool, Tetraform C, was also used to grind Ti-6Al-4V alloys and under selected conditions the ground surface reached a good surface finish and the fatigue properties were also retained at lower depth of cut. An ELID system on the Tetraform C was also investigated. It produced a rougher surface finish in this study. However, it is believed that reducing the wheel loading problem when grinding titanium alloys may contribute to maintaining the fatigue properties.

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Setti, Dinesh. "Performance improvement in grinding of Ti-6Al-4V alloy and modeling of surface roughness". Thesis, IIT Delhi, 2016. http://localhost:8080/iit/handle/2074/7069.

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Shiue, Ren-Kae. "Active braze alloys for metal single layer grinding technology". Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/86277.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1996.
Vita. Cataloged from PDF version of thesis.
Includes bibliographical references (pages 144-153).
Components made of high-performance ceramics or superalloys are subject to strict requirements with regard to their geometric and dimensional accuracy. The surface finish and edge zone characteristics have a large effect on the component's performance. These requirements can not be met directly by the sintering process used in the manufacture of ceramic materials or traditional casting of superalloys. Grinding is both technically and economically the number one choice when one has to consider machining these materials. Metal Single Layer (MSL) grinding technology provides an alternative way to make use of the superabrasives, diamond and CBN, in grinding these materials. One of the primary challenges in MSL grinding technology is to develop suitable active braze alloy(s) which can bond the superabrasive grits. Ticusil (Ag-Cu eutectic+4.5 wt% Ti) and 70Cu-21Sn- 9Ti (wt%) are two of the currently used active braze alloys. The primary failure mode of these two MSL wheels in the grinding test is transverse fracture and debonding of the diamond grits. The high applied load is responsible for transverse fracture of the diamond grit, and the intermetallic phase existing at the interface between the diamond and the braze alloy is one of the causes of the debonding of the diamond grits. Also, a finite element analysis shows that most of the residual thermal stresses and the thermal mismatch strains are localized at the diamond/braze alloy interface. This results in potential weakness of this area. Moreover, the inherent defects, such as voids, and the brittle intermetallics in the interface can cause crack initiation and propagation. Both deteriorate the life of the grinding wheel. The failure of the braze alloy can be divided into two categories. If the grinding process is very abrasive, such as green concrete grinding, the wear resistance of the braze dominates the fracture of the braze alloy. On the other hand, failure of the braze alloy can also result from cracks at the interface. In such a case, the fatigue resistance of the braze alloy plays an important role in determining the wheel's life. The wear resistance of the braze alloy can be improved by introducing suitable hard particles. It was found that a braze alloy of 77Cu-23Sn-12.5Ti-7.5Zr-10TiC-0.2C (by weight) exhibits excellent performance in a wear test (a ten fold improvement), which is further confirmed in the grinding test (a two fold increase in life). The fatigue resistance of the active braze alloy can be modified by either reducing the volume fraction of the brittle intermetallic phase in the braze and/or enhancing the ductility of the braze alloy matrix. A ductile active braze alloy can be achieved by combining the two-layer structure and two step brazing process. To aid dissolution and diffusion of the Cu atoms into the Cu/Sn/Ti braze alloy, a lower volume fraction of the intermetallic phase and higher ductile matrix of the braze can be achieved. Both have beneficial effects in modifying the ductility of the active braze alloy, and make removal of the braze alloy from the substrate by acid etching easier.
by Ren-Kae Shiue.
Ph. D.

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Fursdon, P. M. T. "The continuous dress creep feed form grinding of titanium alloys". Thesis, University of Bristol, 1989. http://hdl.handle.net/1983/5e6c03d3-5847-415b-9967-65eac98f156e.

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Dzebo, Sead. "Investigation of methods to improve process performance in centerless grinding of Inconel 718 and Ti-6Al-4V superalloys". Thesis, Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37113.

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Grinding is an abrasive machining process used for the final shaping of components that require very smooth surfaces and a high dimensional accuracy. In recent years, the costs of industrial grinding operations have increased with a greater demand for high-strength, low-weight superalloy components. Titanium and nickel-based alloys are desirable for their high creep-rupture strength and corrosion and oxidation resistance in high-temperature environments. However, they are very difficult to grinding due to a combination of poor thermal properties, rapid work-hardening, and a high level of chemical reactivity. In this thesis, two methods are investigated to improve process performance in plunge centerless grinding of Inconel 718 and Ti-6Al-4V superalloy fasteners: (i) economic optimization of grinding process parameters and (ii) reduced quantity lubrication using a graphite nanoplatelet-enhanced grinding fluid. In the first part, a systematic methodology is presented for finding the optimum parameters in two stages: (i) modeling of process and part quality constraints, and (ii) determination of optimum grinding conditions in the feasible operating region. In the second part, the performance of a graphite nanoplatelet-enhanced grinding fluid in reduced quantity lubrication centerless grinding is evaluated to assess its potential as a cost-effective alternative to the traditional flood cooling method. The results of the study indicate that an appreciable reduction in the cost of the superalloy grinding operation can be achieved by operating at the optimum parameters. In addition, it is shown that the application of a graphite-enhanced fluid at a reduced flow rate is more effective than high-volume flood cooling in reducing specific grinding energy levels and wheel wear rates, thus offering the potential to increase process productivity.

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Bhaduri, Debajyoti. "Ultrasonic assisted creep feed grinding and dressing of advanced aerospace alloys". Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5415/.

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The research involves the investigation of hybrid ultrasonic assisted creep feed grinding (UACFG) of advanced aeroengine alloys, in particular Inconel 718, CMSX-4 and gamma titanium aluminide (γ-TiAl). For tests with ultrasonic vibration, workpieces were actuated at a constant frequency (~20kHz) via a specially designed block sonotrode attached to a 1kW piezoelectric transducer-generator system. The trials on nickel based superalloys were carried out using open structured alumina wheels whereas γ-TiAl specimens were machined with conventional silicon carbide and single layer diamond superabrasive wheels. Statistically designed experiments involving variation in wheel speed, table speed, depth of cut, grinding condition and vibration amplitude were employed in mainstream testing. Reductions in grinding force components were typically observed albeit at the cost of higher wheel wear and surface roughness of the ground slots when ultrasonic assisted grinding of nickel alloys. Conversely, UACFG of γ-TiAl exhibited lower grinding wheel wear and workpiece surface roughness. Surfaces ground with the assistance of vibration generally revealed greater side flow/ploughing and overlapping grit marks in comparison to standard creep feed ground specimens. Three dimensional topographic measurement of grinding wheel surface replicas indicated that ultrasonic vibration led to an increase in the number of active cutting points on the wheel.

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Rayner, Joshua Lee. "A finite element simulation of thermal profiles in grinding of titanium aluminide". Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/18967.

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Wojtewicz, Michał. "Research on the influence of grinding wheel impregnation with anti-adhesive substances on the efficiency of nickel based alloys grinding process : PhD thesis summary". Rozprawa doktorska, [s.n.], 2017. http://dlibra.tu.koszalin.pl/Content/1049.

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Shajari, S., i R. Sarraf-Mamoory. "The Effect of Raw Materials Molar Ratio in Mechanochemical Synthesis of Amorphous Fe-B Alloy Nanoparticles". Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34897.

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In this study, amorphous iron-boron alloy nanoparticles successfully synthesized by mechanochemical method. The raw materials were ferrous sulfate heptahydrate (FeSO4.7H2O) as a source of iron and sodium borohydride (NaBH4) as a reducing agent. Powders grinding was performed with different NaBH4/FeSO4.7H2O molar ratio. The results revealed that high active and completely amorphous particles could be synthesized with the molar ratio of 4:1 for NaBH4:FeSO4 in 10 minutes of grinding time. Various characterizations, such as the chemical analysis, atomic absorption spectroscopy (AAS), fourier transform infrared spectroscopy (FT-IR), x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) have been performed. The XRD results confirmed the formation of the amorphous phase. Other results also indicate the formation of amorphous alloy nanoparticles with an average particle size below 50 nm and the composition was Fe-10 Wt percent B. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34897

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Zhao, Zhijun. "Role of surface active layers on localized breakdown of aluminum alloy 7075". Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1160670830.

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Książki na temat "Grinding -Alloys"

Isaacson, A. E. Effect of sulfide minerals on ferrous alloy grinding media corrosion. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1989.

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Isaacson, A. E. Effect of sulfide minerals on ferrous alloy grinding media corrosion. Washington, DC: Dept. of the Interior, 1989.

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Redden, L. D. Hydrometallurgical recovery of critical metals from hardface alloy grinding waste: A laboratory study. Washington, DC: Dept. of the Interior, 1988.

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Redden, L. D. Hydrometallurgical recovery of critical metals from hardface alloy grinding waste: A laboratory study. Pittsburgh, PA: U.S. Dept. of the Interior, Bureau of Mines, 1988.

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Rakhit, A. K. Heat Treatment of Gears. ASM International, 2000. http://dx.doi.org/10.31399/asm.tb.htgpge.9781627083478.

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Heat Treatment of Gears: A Practical Guide for Engineers describes the processes and procedures used to harden alloy steel gears and explains how to optimize benefits, such as improved fatigue life, while minimizing distortion and costs. The first few chapters familiarize readers with the basic concepts of heat treating and its effect on the composition, structure, and properties of iron-carbon alloys. The chapters that follow compare and contrast the heat treatments typically used for gears, including through hardening, induction hardening, carburizing, nitriding, and carbonitriding. Carburizing and nitriding are covered in much greater depth than the other methods because of their extensive use and the advantages they offer. As the book explains, carburizing produces gears with three to four times the torque density than that achieved by other methods, while nitriding causes the least amount of distortion. The book also addresses the disadvantages of each process and, using examples, presents various ways to get around them. It also discusses secondary operations, such as shot peening and finish grinding, and provides insights on material and process selection as well as gear design. For information on the print version, ISBN 978-0-87170-694-2, follow this link.

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Parrish, Geoffrey. Carburizing. ASM International, 1999. http://dx.doi.org/10.31399/asm.tb.cmp.9781627083379.

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Carburizing: Microstructures and Properties explains how to recognize and address problems associated with case carburizing treatments for steels. It examines the nature of internal oxidation, decarburization, free carbides, and retained austenite and their effect on fatigue and fracture strength, wear resistance, impact toughness, hardness, and other properties. It discusses the influence of grain size, microcracking, microsegregation, and nonmetallic inclusions and explains how composition and cooling rate determine the core properties of carburized steel parts and how alloy and carbon content largely determine the depth and hardness of the case. It also discusses the effect of tempering, refrigeration, grinding, roller burnishing, and shot peening, and makes extensive use of images, graphs, charts, and examples throughout. For information on the print version, ISBN 978-0-87170-666-9, follow this link.

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Części książek na temat "Grinding -Alloys"

Jackson, Mark J., Micheal D. Whitfield, Grant M. Robinson, Rodney G. Handy i Jonathan S. Morrell. "Grinding of Uranium and Uranium Alloys". W Uranium Processing and Properties, 95–121. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7591-0_4.

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Rudnev, Aleksandr, Yuriy Gutsalenko, Elena Sevidova, Larisa Pupan i Oksana Titarenko. "Diamond Spark Grinding of Hard Alloys Using Solid Lubricants". W Lecture Notes in Mechanical Engineering, 114–22. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77719-7_12.

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Ibrahim, Elsiddig Eldaw, Heisum Ewad, Xun Chen i Andre D. L. Batako. "Grinding of Titanium Alloys (Ti-6Al-4V) Using Vibration Assisted Machining". W Advances in Manufacturing Processes, Intelligent Methods and Systems in Production Engineering, 86–94. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-90532-3_7.

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Kunimine, Takahiro, Motoko Yamada, Hisashi Sato i Yoshimi Watanabe. "Fabrication of Aluminum Alloy-Based Diamond Grinding Wheel by the Centrifugal Mixed-Powder Method for Novel Machining Technology of CFRP". W ICAA13: 13th International Conference on Aluminum Alloys, 189–94. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch29.

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Phi, Hung Trong, Got Van Hoang, Tam Ngoc Bui, Trung Kien Nguyen i Son Hoanh Truong. "The Effect of Microstructure on the Cutting Forces and Microhardness in the Surface Grinding of Titanium Alloys". W Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020), 525–33. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69610-8_72.

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Kunitsyn, Maksym, Anatoly Usov i Yulia Sikirash. "Impact of the Heterogeneous Structure of Magnetic Hard Alloys on the Quality Characteristics of the Surface Layer During Grinding Processing". W Lecture Notes in Mechanical Engineering, 405–14. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91327-4_40.

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Yang, Chang Yong, Jiu Hua Xu, Wen Feng Ding i Sheng Ting Tong. "Grinding Titanium Alloy with Brazed Monolayer CBN Wheels". W Advances in Grinding and Abrasive Technology XIV, 33–37. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-459-6.33.

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Tao, Yi Yi, Jiu Hua Xu i Wen Feng Ding. "A Study on Grinding Performance of Porous NiTi Shape Memory Alloy". W Advances in Grinding and Abrasive Technology XIV, 143–47. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-459-6.143.

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Yang, Zhi Bo, Jiu Hua Xu, Yu Can Fu i Hong Jun Xu. "Laser Brazing of Diamond Grits with a Ni-Based Brazing Alloy". W Advances in Grinding and Abrasive Technology XIV, 43–47. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-459-6.43.

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Huang, Yun, Z. Huang, Q. S. Xu i W. Zhou. "The Grinding Force Measure and Analysis on the Abrasive Belt Grinding to Magnesium Alloy". W Key Engineering Materials, 726–29. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.726.

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Streszczenia konferencji na temat "Grinding -Alloys"

Pavel, Radu, Xiqun Wang i Anil K. Srivastava. "Multi-Constraint Optimization for Grinding Nickel-Based Alloys". W ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1205.

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Nickel-based alloys (Ni-based alloys) are used on a large scale in military, aerospace, missile and defense applications with the aim of improving performance, life, and fuel efficiency. Grinding is extensively used for final finishing of these components. Due to their specific material properties, such as work-hardening and low thermal conductivity, the workpieces made of Ni-based alloys are difficult to grind. The difficulty consists in finding the combination of dressing and grinding parameters that generate the prescribed dimensions, finish, and surface integrity of the finished part with high productivity. Increasing productivity is generally associated with increasing the material removal rate. This, in turn, can create detrimental effects on the ground parts such as micro-cracks, high residual stresses, white layers, and thermal damage. This paper presents a novel methodology for determining an optimal combination of dressing and grinding parameters with respect to maximizing the material removal rate, while taking into account a number of process constraints including: grinding force, power, surface roughness, wheel wear, and surface integrity. According to this methodology, predictive models for grinding behavior are determined using a reduced number of experiments based on an in-process, fast sensor data acquisition system. The models are used as inputs for the multiple criterion optimization program based on a genetic algorithm approach. A CNC surface grinding machine was instrumented to allow process monitoring and data collection. The model building and the optimization methodology have been validated using specimens made of Ni-based alloys. The workpiece materials and the range of the grinding parameters were selected according to applications from aerospace industry. The results support the use of adopted methodology for finding the optimal combination of dressing and grinding parameters.

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Dias Monteiro, Felipe, Carlos Ventura, Armando Ítalo Sette Antonialli i Edson Bruno Lara Rosa. "Grinding customized carbides for thread turning of titanium alloys". W 26th International Congress of Mechanical Engineering. ABCM, 2021. http://dx.doi.org/10.26678/abcm.cobem2021.cob2021-1692.

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Jackson, Mark J., i Xun Chen. "Reducing Wear of Abrasive Wheels Grinding Aerospace Alloys by Laser Assisted Cleaning". W World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63923.

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A new method for cleaning loaded grinding wheels is introduced by applying a CO2 laser pulse to the wheel surface. It is shown that effective cleaning can be achieved by the selection of adequate laser power flux and irradiation duration. Fusion and evaporation of clogged chips play an important role in the laser cleaning process and subsequent wear of the grinding wheel. It is suggested that high laser power irradiance of short duration is essential for effective wheel cleaning and reduced wear of the grinding wheel with specially developed bonds.

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Stoimenov, Nikolay, Dimitar Karastoyanov, Milena Groueva, Bogomil Popov i Nikola Sabotinkov. "Robotized High-Temperature Technology Producing Materials and Alloys for Grinding Media". W 2018 5th International Conference on Mathematics and Computers in Sciences and Industry (MCSI). IEEE, 2018. http://dx.doi.org/10.1109/mcsi.2018.00018.

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Youssef, Sawsen, Olivier Calonne i Hédi Hamdi. "Influence of Hand Disc Grinding on Surface Integrity of Nickel-Based Alloys: Numerical Approach". W ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97974.

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For complex part geometry, hand grinding is one of finishing and super finishing process the most used in mechanical industry. Surface integrity is today one major concern for industrials. The surface integrity is defined by a set of important characteristics of ground surface as surface geometric parameters (roughness, …), mechanical behaviour of the subsurface (hardness, residual stress, …) and structural changes of the material in the near surface. High heat and pressure, high strain and strain rate observed during hand grinding process, strongly influence surface integrity. Therefore, the surface behaviour, in terms of resistance to corrosion and crack initiation depends on how the process was conducted. The purpose of this study is to understand the effects of thermal and mechanical plastic deformation induced on the surface of components. The action of the disc-grinding wheel on the workpiece is modelled by a moving heat flux on the surface. The challenge is to be able to find the shape and intensity of thermomechanical load entering the workpiece in accordance with the hand disc grinding process and taking into account specific parameters of the process. In a first part, a mechanical description of the action of the disc-wheel on the surface is proposed in order to develop an analytic formulation of the grinding power and the heat flux density. They are function of the disc-grinding wheel velocity, the feed speed and the applied forces. This expression is then used in a finite element modelling to perform thermomechanical simulations of the hand disc-grinding process. In a first stage, heating and cooling are computed. They give maximum temperature reached, temperature gradients and cooling kinematic. In a second stage, thermomechanical computation is conducted in order to compute residual stresses induced by this abrasion process. A discussion based on experimental results obtained by XRD method is then proposed and some local explanation are given on the way the material structure has changed leading to a structural hardening in the 50 first microns beneath the ground surface.

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Shen, Nanyan, Yakai Jia i Jing Li. "Surface roughness of titanium alloys TA2 and TC4 in high-speed cylindrical grinding". W 2013 International Conference on Advanced Materials and Information Technology Processing. Southampton, UK: WIT Press, 2014. http://dx.doi.org/10.2495/amitp130261.

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Pavel, Radu, i Anil K. Srivastava. "Investigations for Safe Grinding of Ti-6Al-4V Parts Produced by Direct Metal Laser Sintering (DMLS) Technology". W ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-4130.

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Direct Metal Laser Sintering (DMLS) is an additive manufacturing technology that can construct medium to small size parts very efficiently in comparison to traditional machining processes. The ability of this technology to grow complex parts made of high strength titanium- and nickel-based alloys led to increasing interest from aerospace, defense, and medical industries. Although the technology allows growing parts close to their final shape, the active surfaces still need a finishing operation such as grinding to meet the tight tolerances and surface finish requirements. Due to the novelty of the DMLS technology, and the relatively recent developments of titanium alloy powders, there is a need for testing and validating the capabilities of the components manufactured through a combination of DMLS and grinding processes. This paper presents the findings of an experimental study focused on the effect of various grinding conditions on the surface integrity of titanium alloy (Ti-6Al-4V) specimens produced using DMLS technology. The goal is to identify dressing and grinding conditions that would result in ground surfaces free of defects such as micro-cracks, discoloration of surfaces and/or burn marks due to high heat generated during grinding. The residual stresses were used to quantify the effect of the grinding conditions on the ground surfaces. These investigations were conducted on an instrumented CNC surface grinding machine, using a silicon-carbide grinding wheel and a water-based fluid. The X-ray diffraction method was used to measure the residual stresses. Two batches of specimens were manufactured for these tests. The growing strategy of the specimens and the presence of apparent defects in material structure are considered some of the main causes for the differences observed in the outcomes of the grinding trials. The results of these investigations support the need for continuing research in the additive manufacturing field to develop methods and technologies that will ensure a high level of consistency of the grown parts.

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Макаренко, Константин, Konstantin Makarenko, Сергей Кузовов, Sergey Kuzovov, Александр Никитин i Alexander Nikitin. "Visualization of the Phase Volume Distribution in Alloys". W 29th International Conference on Computer Graphics, Image Processing and Computer Vision, Visualization Systems and the Virtual Environment GraphiCon'2019. Bryansk State Technical University, 2019. http://dx.doi.org/10.30987/graphicon-2019-2-236-239.

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The method of obtaining the volume distribution of phases in structural materials is considered. The technique is based on the layer-by-layer grinding of metallographic samples with photo fixation of microstructure images and the subsequent computer processing of these images. An example of using the developed methodology to study the features of the volumetric distribution of graphite inclusions in high-strength cast irons is presented. The classification of graphite inclusions depending on the shape, size and distribution features is given. The study of the features of the distribution of graphite inclusions led to the conclusion about the patterns and mechanisms of formation graphite phase in cast iron.

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Churi, N. J., Z. C. Li, Z. J. Pei i C. Treadwell. "Rotary Ultrasonic Machining of Titanium Alloy: A Feasibility Study". W ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80254.

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Due to their unique properties, titanium alloys are attractive for some unique applications especially in the aerospace industry. However, it is very difficult to machine these materials cost-effectively. Although many conventional and non-conventional machining methods have been reported for machining them, no reports can be found in the literature on rotary ultrasonic machining of titanium alloys. This paper presents an experimental study on rotary ultrasonic machining of a titanium alloy. The tool wear, cutting force, and surface roughness when rotary ultrasonic machining of the titanium alloy have been investigated using different tool designs and machining conditions. The results are compared with those when machining the same material with diamond grinding.

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Scruggs, D. M. "The Tribology of Amorphous Surfaces Formed by Wear of Thermal Spray Coatings". W ITSC 1998, redaktor Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p0249.

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Abstract This paper describes the wear induced transformation of crystalline metal surfaces into amorphous and/or microcrystalline surfaces that exhibit gross changes in the fundamental properties of friction, wear, hardness and toughness. The coatings are applied using wire and powder feed to TWAS and HVOF equipment. Wear processes investigated include adhesive wear, low stress abrasion, grinding wear and galling. The effects of chemical makeup of the surfaces and the alloy structure are examined using microscopy and x-ray diffraction. The surface & underlying coating characteristics including roughness, microstructure, hardness and friction coefficient are determined. Results show that the surface structure is dependent on the wear vector. The structural transformation is a function of the chemical makeup and intrinsic wear resistance of the crystalline alloy coupled with the energy input of the wear process. High energy wear such as grinding wear can overcome the transformation. The results also suggest that the micro-welding that occurs between asperities in crystalline alloys is replaced by a flow process on the transformed surface. Coating structure, glass transition temperature, crystallization temperature and critical cooling rate of the transformed surface are much more significant than the chemistry of the alloy once the transformation takes place.

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