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Author: Grafiati

Published: 6 September 2023

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1

Kapłonek, Wojciech, Krzysztof Nadolny, Krzysztof Rokosz, Jocelyne Marciano, Mozammel Mia, Danil Yurievich Pimenov, Olga Kulik, and Munish Kumar Gupta. "Internal Cylindrical Grinding Process of INCONEL® Alloy 600 Using Grinding Wheels with Sol–Gel Alumina and a Synthetic Organosilicon Polymer-Based Impregnate." Micromachines 11, no. 2 (January 21, 2020): 115. http://dx.doi.org/10.3390/mi11020115.

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The development of modern jet engines would not be possible without dynamically developed nickel–chromium-based superalloys, such as INCONEL® The effective abrasive machining of above materials brings with it many problems and challenges, such as intensive clogging of the grinding wheel active surface (GWAS). This extremely unfavorable effect causes a reduction in the cutting ability of the abrasive tool as well as increase to grinding forces and friction in the whole process. The authors of this work demonstrate that introduction of a synthetic organosilicon polymer-based impregnating substance to the GWAS can significantly improve the effects of carrying out the abrasive process of hard-to-cut materials. Experimental studies were carried out on a set of a silicon-treated small-sized sol–gel alumina 1-35×10×10-SG/F46G10VTO grinding wheels. The set contained abrasive tools after the internal cylindrical grinding process of INCONEL® alloy 600 rings and reference abrasive tools. The condition of the GWAS after the impregnation process was studied, including imaging and measurements of its microgeometry using confocal laser scanning microscopy (CLSM), microanalysis of its elemental distribution using energy dispersive X-ray fluorescence (EDXRF), and the influence of impregnation process on the grinding temperature using infrared thermography (IRT). The obtained results confirmed the correctness of introduction of the impregnating substance into the grinding wheel structure, and it was possible to obtain an abrasive tool with a recommended characteristic. The main favorable features of treated grinding wheel concerning the reduction of adhesion between the GWAS and grinding process products (limitation of the clogging phenomenon) as well as reduction of friction in the grinding process, which has a positive effect on the thermal conditions in the grinding zone.

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2

Nadolny, Krzysztof, Walery Sienicki, and Michał Wojtewicz. "The effect of sulfurization on the grinding wheel cutting ability in the internal cylindrical grinding of nickel superalloys." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 231, no. 1 (August 8, 2016): 140–54. http://dx.doi.org/10.1177/0954405415572643.

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One possible way of preventing excessive growth of smearings/loads on the grinding wheel active surface is the introduction of compounds such as sulfur, graphite, or wax into the grinding wheel volume which exerts an active influence on adhesion during the process of impregnation. Limiting the formation of smearings/loads on the grinding wheel active surface is of crucial importance to achieve effective grinding of hard-to-cut materials (such as nickel superalloys) which are characterized by considerable ductility and a strong chemical affinity to abrasive grains, among other things. This article presents the results of experimental tests performed on plunge grinding and the influence of sulfur impregnation of grinding wheels on the smearing/load intensity on the grinding wheel active surface during the process of internal cylindrical plunge grinding of openings made from Inconel® alloy 600 and Incoloy® alloy 800HT®. Bearing steel 100Cr6 was included in the tests as a reference material. Grinding wheels were impregnated with a new method of gravitational sulfurization combined with centrifuging. The experiments carried out show that the adhesive properties of sulfur allowed for considerable limitation of smearing/loading of the grinding wheel active surface with machined material. This mainly concerned limiting the formation of the largest and most technologically undesirable smearings/loads of the intergranular spaces. The presence of sulfur in the grinding wheel volume had a minor influence on the intensity of smearings/loads in the microareas of the active abrasive grains’ apexes. The tests also showed an increase of 32%–49% in the value of parameter Sa in the surfaces ground with grinding wheels impregnated with sulfur for all the examined materials.

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3

Mishra, Virendra, and Pulak M. Pandey. "Experimental investigations into electric discharge grinding and ultrasonic vibration-assisted electric discharge grinding of Inconel 601." Materials and Manufacturing Processes 33, no. 14 (March 27, 2018): 1518–30. http://dx.doi.org/10.1080/10426914.2018.1453143.

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4

Park, Ki Beom, Young Tae Cho, and Yoon Gyo Jung. "Determination of Johnson-Cook constitutive equation for Inconel 601." Journal of Mechanical Science and Technology 32, no. 4 (April 2018): 1569–74. http://dx.doi.org/10.1007/s12206-018-0311-9.

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5

Jovicic, Goran, Aleksandar Milosevic, Zeljko Kanovic, Mario Sokac, Goran Simunovic, Borislav Savkovic, and Djordje Vukelic. "Optimization of Dry Turning of Inconel 601 Alloy Based on Surface Roughness, Tool Wear, and Material Removal Rate." Metals 13, no. 6 (June 2, 2023): 1068. http://dx.doi.org/10.3390/met13061068.

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In this work, the dry turning of Inconel 601 alloy in a dry environment with PVD-coated cutting inserts was studied. Turning was performed at various cutting speeds, feeds, insert shapes, corner radii, rake angles, and approach angles. After machining, arithmetic mean surface roughness (Ra) and flank wear (VB) were measured, and the material removal rate was also calculated (MRR). An analysis of variance (ANOVA) was performed to determine the effects of the turning input parameters. For the measured values, the turning process was modeled using an artificial neural network (ANN). Based on the obtained model, the process parameters were optimized using a genetic algorithm (GA). The objective function was to simultaneously minimize Ra and VB and maximize MRR. The accuracy of the model and the optimal values were further validated by confirmation experiments. The maximum percentage errors, which are less than 2%, indicate the possibility of practical implementation of the hybrid approach for modeling and optimization of dry turning of Inconel 601 alloy.

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6

Wang, Junwei, Jijin Xu, Xiaoqiang Zhang, Xukai Ren, Xuefeng Song, and Xiaoqi Chen. "An Investigation of Surface Corrosion Behavior of Inconel 718 after Robotic Belt Grinding." Materials 11, no. 12 (December 2, 2018): 2440. http://dx.doi.org/10.3390/ma11122440.

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Surface corrosion resistance of nickel-based superalloys after grinding is an important consideration to ensure the service performance. In this work, robotic belt grinding is adopted because it offers controllable material processing by dynamically controlling process parameters and tool-workpiece contact state. Surface corrosion behavior of Inconel 718 after robotic belt grinding was investigated by electrochemical testing in 3.5 wt % NaCl solution at room temperature. Specimens were characterized by morphology, surface roughness and residual stress systematically. The potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) analysis indicate the corrosion resistance of the specimen surface improves remarkably with the decrease of abrasive particle size. It can be attributed to the change of surface roughness and residual stress. The energy dispersive X-ray spectroscopy (EDS) indicates that niobium (Nb) is preferentially attacked in the corrosion process. A plausible electrochemical dissolution behavior for Inconel 718 processed by robotic belt grinding is proposed. This study is of significance for achieving desired corrosion property of work surface by optimizing grinding process parameters.

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7

Ohlert, M., M. Lachenmaier, D. Trauth, and T. Bergs. "Außenrundschleifen von Inconel 718*/External cylindrical grinding of Inconel 718 – Comparison of electroplated CBN and diamond grinding wheels cooled with water-based solution." wt Werkstattstechnik online 109, no. 06 (2019): 468–72. http://dx.doi.org/10.37544/1436-4980-2019-06-70.

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Zur schleiftechnischen Bearbeitung schwer zerspanbarer Werkstoffe wie Inconel 718 werden in der Industrie überwiegend CBN (kubisch kristallines Bornitrid)-Schleifscheiben verwendet. In der Regel kommt dabei Öl als Kühlschmierstoff zum Einsatz, was jedoch für viele Anwender nicht immer möglich ist. Ziel der Untersuchungen war daher der Vergleich zwischen galvanisch gebundener CBN- und Diamant-Schleifscheibe hinsichtlich Verschleiß und Zerspanleistung beim Außenrundschleifen von Inconel 718 unter Kühlung mit einer wasserbasierten Lösung.   CBN grinding wheels are mainly used in industry to grind materials that are difficult to machine, such as Inconel 718. Usuially oil is used as a cooling lubricant, but this is not always possible for many users. Therefore, the aim of the investigation was to compare electroplated CBN and diamond grinding wheels regarding wear and cutting performance during external cylindrical grinding of Inconel 718 while being cooled with a water-based solution.

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8

Ivanova, T. N., Witold Biały, Jacek Sitko, Katarzyna Midor, and Alexander Muyzemnek. "Grinding of High-Strength Materials." Materials Science Forum 1037 (July 6, 2021): 595–602. http://dx.doi.org/10.4028/www.scientific.net/msf.1037.595.

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The joint research of scientists of two countries deals with cylindrical and surface grinding with abrasive wheels of heat-resistant steel Inconel 625 (KhN77TYu GOST 5632 – 72 Russian Federation standard), (analogues include Hastalloy, N07080, Alloy 80A, Nimonic 80A, 2.4952 ASTM B637/ASME SB637, UNS N07080). The article shows the results of studies of the features of high-temperature steel during grinding with a fastened abrasive. The results of experiments are given to determine the optimal characteristics of grinding wheels, grinding modes, cooling-lubricant fluids. Experimental data about geometric accuracy, surface roughness, resistance of wheels are demonstrated as well. The ways to prevent from defects during cylindrical and surface grinding of high-strength steel are proposed. The recommendations to increase the tool resistance and output of the process are given.

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9

Sarvghad, Madjid, Geoffrey Will, and Theodore A. Steinberg. "Corrosion of Inconel 601 in molten salts for thermal energy storage." Solar Energy Materials and Solar Cells 172 (December 2017): 220–29. http://dx.doi.org/10.1016/j.solmat.2017.07.036.

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10

Novák, Martin, Natasa Naprstkova, and Hitoshi Ohmori. "Grinding of the Alloy INCONEL 718 and Final Roughness of the Surface." Key Engineering Materials 686 (February 2016): 212–17. http://dx.doi.org/10.4028/www.scientific.net/kem.686.212.

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Grinding is currently still an important method for surface finishing. At FPTM JEPU is realized the research, which deals with this issue. There are carried out experiments with grinding various materials under different conditions and then are evaluated the selected components of the surface integrity, which are generally roughness Ra, Rz, Rt and Rmax, material ratio curve (Abbott Firestone curve) and also obtained roudness. This article deals with grinding nickel alloy Inconel 718, when selected cutting grinding conditions were used and subsequently the surface roughnesses Ra, Rz, Rt and Rmax were measured and evaluated.

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11

Kopytowski, Adrian, Rafał Świercz, Dorota Oniszczuk-Świercz, Józef Zawora, Julia Kuczak, and Łukasz Żrodowski. "Effects of a New Type of Grinding Wheel with Multi-Granular Abrasive Grains on Surface Topography Properties after Grinding of Inconel 625." Materials 16, no. 2 (January 11, 2023): 716. http://dx.doi.org/10.3390/ma16020716.

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Finishing operations are one of the most challenging tasks during a manufacturing process, and are responsible for achieving dimensional accuracy of the manufactured parts and the desired surface topography properties. One of the most advanced finishing technologies is grinding. However, typical grinding processes have limitations in the acquired surface topography properties, especially in finishing difficult to cut materials such as Inconel 625. To overcome this limitation, a new type of grinding wheel is proposed. The tool is made up of grains of different sizes, which results in less damage to the work surface and an enhancement in the manufacturing process. In this article, the results of an experimental study of the surface grinding process of Inconel 625 with single-granular and multi-granular wheels are presented. The influence of various input parameters on the roughness parameter (Sa) and surface topography was investigated. Statistical models of the grinding process were developed based on our research. Studies showed that with an increase in the cutting speed, the surface roughness values of the machined samples decreased (Sa = 0.9 μm for a Vc of 33 m/s for a multigranular wheel). Observation of the grinding process showed an unfavorable effect of a low grinding wheel speed on the machined surface. For both conventional and multigranular wheels, the highest value for the Sa parameter was obtained for Vc = 13 m/s. Regarding the surface topography, the observed surfaces did not show defects over large areas in the cases of both wheels. However, a smaller portion of single traces of active abrasive grains was observed in the case of the multi-granular wheel, indicating that this tool performs better finishing operations.

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12

Ruzzi, Rodrigo de Souza, Raphael Lima de Paiva, Leonardo Rosa Ribeiro da Silva, Alexandre Mendes Abrão, Lincoln Cardoso Brandão, and Rosemar Batista da Silva. "Comprehensive study on Inconel 718 surface topography after grinding." Tribology International 158 (June 2021): 106919. http://dx.doi.org/10.1016/j.triboint.2021.106919.

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13

Yu, Y. K., D. W. Liaw, and R. K. Shiue. "Infrared brazing Inconel 601 and 422 stainless steel using the 70Au-22Ni-8Pd braze alloy." Journal of Materials Science 40, no. 13 (July 2005): 3445–52. http://dx.doi.org/10.1007/s10853-005-0446-9.

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14

Zhao, Jia Yan, Yu Can Fu, Jiu Hua Xu, Lin Tian, and Lu Yang. "Forces and Chip Morphology of Nickel-Based Superalloy Inconel 718 during High Speed Grinding with Single Grain." Key Engineering Materials 589-590 (October 2013): 209–14. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.209.

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Single-grain grinding test plays an important part in studying the high speed grinding mechanism of materials. In this paper, a new experimental system for high speed grinding test with single diamond grain is presented. The differences of surface topography and chip morphology of Inconel 718 machined by single diamond grain and single CBN grain were evaluated. The grinding forces and corresponding maximum undeformed chip thickness were measured under different grinding speeds. The chips, characterized by crack and segment band feature like the cutting segmented chips, were collected to study the high speed grinding mechanism of nickel-based superalloy. The results show that the grinding speed has an important effect on the forces and chip formation, partly due to the temperature variation. As the speed increases, the groove surface becomes smoother.

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15

Zahedi, Ali, and J. Akbari. "FEM Analysis of Single Grit Chip Formation in Creep-Feed Grinding of Inconel 718 Superalloy." Advanced Materials Research 325 (August 2011): 128–33. http://dx.doi.org/10.4028/www.scientific.net/amr.325.128.

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Recent advances in materials science have necessitated the development and understanding of manufacturing processes for safe and repeatable utilization. Grinding is shown to be a promising material removal process especially for brittle and hard to cut materials such as superalloys. Grinding has always been associated with analysis and modeling complications regarding its nature which has limited its extension and reliability of use. The first step in analysis of grinding is considering the action of a single abrasive grit on workpiece surface. In this work the action of a single CBN abrasive grit in creep-feed grinding process of Inconel 718 superalloy is modeled and analyzed using a 3D FEM software, DEFORM. Thermal and mechanical characteristics of the mutual interaction between grit and workpiece surface, and different chip formation phases are defined which can further be used to analyze the whole process.

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16

Tawakoli, Taghi, Bahman Azarhoushang, and Abdolreza Rasifard. "Wear Behavior of a Vitrified Bond CBN Wheel by Ultrasonic-Assisted Creep Feed Profile Grinding of Inconel 718." Advanced Materials Research 325 (August 2011): 122–27. http://dx.doi.org/10.4028/www.scientific.net/amr.325.122.

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Generally in the grinding of modern aviation materials such as nickel-based superalloys, problems frequently occur in terms of burr formation, profile loss of the wheel, high heat generation in the contact zone, high grinding forces as well as low process reliability. A recent and promising method to overcome these technological constraints is the use of ultrasonic assistance, where high-frequency and low amplitude vibrations are superimposed on the movement of the workpiece. This paper presents the design of an ultrasonically vibrated block sonotrode and the experimental investigation of ultrasonically assisted profile grinding of Inconel 718. The profile wear, radial wear of the wheel, grinding forces and surface roughness by ultrasonic-assisted and conventional profile grinding were measured and compared. The obtained results show that the application of ultrasonic vibration can decrease the radial wear of the wheel, profile wear, grinding forces and surface roughness considerably.

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17

Ding, Jie, Yifan Zhang, Tongjun Niu, Zhongxia Shang, Sichuang Xue, Bo Yang, Jin Li, Haiyan Wang, and Xinghang Zhang. "Thermal Stability of Nanocrystalline Gradient Inconel 718 Alloy." Crystals 11, no. 1 (January 11, 2021): 53. http://dx.doi.org/10.3390/cryst11010053.

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Gradient structures containing nanograins in the surface layer have been introduced into Inconel 718 (IN718) nickel-based alloy using the surface mechanical grinding treatment technique. The thermal stability of the gradient IN718 alloy was investigated. Annealing studies reveal that nanograins with a grain size smaller than 40 nm exhibited significantly better thermal stability than those with larger grain size. Transmission electron microscopy analyses reveal that the enhanced thermal stability was attributed to the formation of grain boundaries with low energy configurations. This study provides new insight on strategies to improve the thermal stability of nanocrystalline metals.

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18

Ding, Jie, Yifan Zhang, Tongjun Niu, Zhongxia Shang, Sichuang Xue, Bo Yang, Jin Li, Haiyan Wang, and Xinghang Zhang. "Thermal Stability of Nanocrystalline Gradient Inconel 718 Alloy." Crystals 11, no. 1 (January 11, 2021): 53. http://dx.doi.org/10.3390/cryst11010053.

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Gradient structures containing nanograins in the surface layer have been introduced into Inconel 718 (IN718) nickel-based alloy using the surface mechanical grinding treatment technique. The thermal stability of the gradient IN718 alloy was investigated. Annealing studies reveal that nanograins with a grain size smaller than 40 nm exhibited significantly better thermal stability than those with larger grain size. Transmission electron microscopy analyses reveal that the enhanced thermal stability was attributed to the formation of grain boundaries with low energy configurations. This study provides new insight on strategies to improve the thermal stability of nanocrystalline metals.

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19

Erdoğan, Nida Nur, and Aziz Barış Başyiğit. "Investigating thermal shock and corrosion resistance of Inconel 601 super alloy after thermal barrier coating with %8 YSZ powder." Materials Today Communications 36 (August 2023): 106516. http://dx.doi.org/10.1016/j.mtcomm.2023.106516.

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20

Patil, D. V., S. Ghosh, A. Ghosh, A. K. Chattopadhyay, and A. B. Chattopadhyay. "On grindability of Inconel 718 under high efficiency deep grinding by monolayer cBN wheel." International Journal of Abrasive Technology 1, no. 2 (2007): 173. http://dx.doi.org/10.1504/ijat.2007.015382.

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21

Boland, F., C. Colin, and F. Delannay. "Control of interfacial reactions during liquid phase processing of aluminum matrix composites reinforced with INCONEL 601 fibers." Metallurgical and Materials Transactions A 29, no. 6 (June 1998): 1727–39. http://dx.doi.org/10.1007/s11661-998-0096-z.

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22

Singh, Raju, and Audhesh Narayan. "Parametric study of indigenously developed electrochemical diamond cut-off grinding setup using Inconel 925." International Journal of Machining and Machinability of Materials 24, no. 5 (2022): 370. http://dx.doi.org/10.1504/ijmmm.2022.126592.

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23

Wang, Junwei, Jijin Xu, Xiangfei Wang, Xiaoqiang Zhang, Xuefeng Song, and Xiaoqi Chen. "A comprehensive study on surface integrity of nickel-based superalloy Inconel 718 under robotic belt grinding." Materials and Manufacturing Processes 34, no. 1 (November 8, 2018): 61–69. http://dx.doi.org/10.1080/10426914.2018.1512137.

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24

Peng, Ruitao, Jiawei Tong, Xinzi Tang, Xiaofang Huang, and Kaifa Liu. "Application of a pressurized internal cooling method in grinding inconel 718: Modeling-simulation and testing-validation." International Journal of Mechanical Sciences 189 (January 2021): 105985. http://dx.doi.org/10.1016/j.ijmecsci.2020.105985.

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25

Curà, Francesca, Raffaella Sesana, Luca Corsaro, and Riccardo Mantoan. "Characterization of Thermal Barrier Coatings Using an Active Thermography Approach." Ceramics 5, no. 4 (October 25, 2022): 848–61. http://dx.doi.org/10.3390/ceramics5040062.

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The aim of this paper is to define and set up an experimental procedure, based on active thermography, for the characterization of coatings for industrial applications. This procedure is intended to be a fast and reliable method, alternative to the consolidated one described in International Standards. In more detail, a classical active thermographic set up, and not a dedicated apparatus, was used for that aim, and data processing techniques referred to the analytical approach described in Standards. The active thermography procedure provided the measurement of the surface temperature of specimens undergoing a thermal excitation, applied by means of a laser pulse (Pulsed Technique). Temperature data processing, according to and adapting the Standard procedures, allowed to obtain thermal conductivity and diffusivity information. In particular, two coating processes (Atmospheric and Suspension Plasma Spray) applied to the same base material, Inconel 601, and the same coating material were investigated. These results were compared in terms of thermal properties variation with respect to base and coated materials, and in terms of different coating processes (APS and SPS). Obtained results were also compared to those available in literature.

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26

Ruzzi, Rodrigo de Souza, Raphael Lima de Paiva, Rogério Valentim Gelamo, Alisson Rocha Machado, and Rosemar Batista da Silva. "Study on grinding of inconel 625 and 718 alloys with cutting fluid enriched with multilayer graphene platelets." Wear 476 (July 2021): 203697. http://dx.doi.org/10.1016/j.wear.2021.203697.

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27

Köktaş, Serhan, Ali Bülent Önay, and Ahmet Çağrı Kılınç. "Production and Characterization of Al-Si Coatings Fabricated by Mechanical Alloying Method on Inconel 625 Superalloy Substrates." Coatings 11, no. 9 (August 25, 2021): 1016. http://dx.doi.org/10.3390/coatings11091016.

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Inconel superalloys are used substantially in high-temperature environments. However, these alloys suffer from corrosion and wear. Attempts to overcome these drawbacks involve coating the metal with different techniques and materials. In this study, a new method with increasing potential was utilized. Using the mechanical alloying process in a planetary ball mill vial, alloying and the Al-Si coatings were concurrently achieved on Inconel 625 substrates. Different process control agent (PCA) ratios, milling ball diameters, and milling times were used to improve coating properties. Macro and microstructure, morphology, microhardness, and roughness values of samples were evaluated and compared. Additionally, crystallographic and cross-sectional properties were investigated in order to optimize the processing conditions. The results indicated that increasing the diameter of the grinding ball enhanced the hardness and thickness of these coatings and increased the roughness values. Longer processing time also enhanced the thickness with mechanical values. However, under these conditions, coating homogeneity decreased, and incompatible regions were formed on the coatings. PCA content brought a refined grain structure, hence showed better mechanical properties. On the other hand, processing time should be increased to get a denser and thicker protective layer against the operational conditions.

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28

Zhou, Kun, Guijian Xiao, Jiayu Xu, and Yun Huang. "Wear evolution of electroplated diamond abrasive belt and corresponding surface integrity of Inconel 718 during grinding." Tribology International 177 (January 2023): 107972. http://dx.doi.org/10.1016/j.triboint.2022.107972.

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29

Esmaeili, Hamed, Hamed Adibi, Reza Rizvi, and Seyed Mehdi Rezaei. "Coupled thermo-mechanical analysis and optimization of the grinding process for Inconel 718 superalloy using single grit approach." Tribology International 171 (July 2022): 107530. http://dx.doi.org/10.1016/j.triboint.2022.107530.

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30

Rao, Zhiwen, Guodong Xiao, Biao Zhao, Yejun Zhu, and Wenfeng Ding. "Effect of wear behaviour of single mono- and poly-crystalline cBN grains on the grinding performance of Inconel 718." Ceramics International 47, no. 12 (June 2021): 17049–56. http://dx.doi.org/10.1016/j.ceramint.2021.03.012.

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31

Virdi, Roshan Lal, Sukhpal Singh Chatha, and Hazoor Singh. "Experimental investigations on the tribological and lubrication behaviour of minimum quantity lubrication technique in grinding of Inconel 718 alloy." Tribology International 153 (January 2021): 106581. http://dx.doi.org/10.1016/j.triboint.2020.106581.

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32

Gadalińska, Elżbieta, Andrzej Michałowski, and Sławomir Czarnewicz. "Determination of Stress Values in the Surface Layer of Inconel 718 Samples Dedicated to Fatigue Tests." Fatigue of Aircraft Structures 2019, no. 11 (December 1, 2019): 78–86. http://dx.doi.org/10.2478/fas-2019-0008.

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AbstractThis work deals with the problem of X-ray stress determination on the samples dedicated to fatigue tests. A number of research studies point out the fact that the processing of hard, difficult to machine materials like nickel superalloys, reveals more than one trend of residual stress versus working parameters of behaviour (Lavella and Berruti, 2010). Many papers have shown that the residual stresses are dependent on a combination of a number of factors. When the above is taken into account simultaneously with the requirements of the internal General Electric specification for the fatigue tests samples preparation (Metallic test specimen preparation, low stress, 2017) the problem of turning and grinding parameters gathers significance. It is well known that the quality of the surface layer, produced during machining, is of vital importance for the fatigue life specially for the components of aircraft produced form nickel superalloys e.g. Inconel 718 (Kortabarri et al., 2011). That is why the surface layer’s properties are described in detail by the standards. The aim of the work is to determine one of the most influential features from the point of view of fatigue life, i.e. the stress state on the surface layer with one non-destructive method – the diffraction analysis.

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33

Shekhawat, MS, Harlal Singh Mali, and APS Rathore. "Development of Centreless Electric Discharge Grinding Machining Process and Optimization of Process Parameters." Recent Patents on Engineering 14 (April 23, 2020). http://dx.doi.org/10.2174/1872212114999200423113816.

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Aims & Objective: Producing thin walled rotationally symmetrical parts of difficult-to-machine materials by electrical discharge machining is an evolving field of research. Poor heat transmissivity, high hot strength and in-process deflection of thin walled Inconel 600 parts puts great challenge for its processing by conventional machining methods. Methods: In this study a novel hybrid process called centreless electric discharge grinding(CEDG) is employed for machining of Inconel 600 tubes using rotating disc wheel electrode to improve process parameters. This paper details about the experimental findings of the influence of four process parameters viz. pulse on time, peak current, gap voltage, and duty cycle on the responses viz. average material removal rate (MRR) and average surface roughness(Ra). Response surface method’s (RSM) central composite design was implemented to determine the effects of parameters on responses. Analysis of variance (ANOVA) techniques were employed to establish the adequacy of the mathematical models and to analyse the significance of regression coefficients. RSM’s desirability approach was used to solve the multi-response optimization. Results: It was clearly noticed that the peak current and gap voltage were the most influential parameters to affect the MRR and surface roughness. Maximum average MRR of 473 mg per min. was achieved at pulse on time 60µs, peak current 25 amps, gap voltage 40 V, at duty cycle of 8 while minimum average surface roughness of 8.4 µm Ra was obtained at pulse on time 40µs, peak current 15 amps, gap voltage 40 V, and duty cycle 6. Conclusion: Confirmation run was conducted by adjusting the variables at optimal level within the selected range. It was concluded that optimum level of variables can be determined for optimized responses prior to conduct of experiment.

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34

Sinha, Manoj Kumar, Kamal Kishore, and Pankaj Sharma. "Surface integrity evaluation in ecological nanofluids assisted grinding of Inconel 718 superalloy." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, April 24, 2023, 095440892311710. http://dx.doi.org/10.1177/09544089231171042.

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Surface integrity is an important term that describes the surface behaviour of a ground component. Grinding is defined as a finishing operation that has high specific energy consumption. High heat generation while grinding, adversely affects the surface integrity of the ground surfaces. With the development of advanced materials such as superalloys, this process is widely used in bulk machining for making critical components used in dynamic loading. Therefore, it becomes necessary to investigate the surface integrity of the ground components, as their surface integrity primarily determines their performance and durability. The purpose of this work is to enhance the grinding performance of Inconel 718, a difficult-to-grind material, by employing silver and zinc oxide (ZnO)-based ecological nanofluids in a minimum quantity lubrication (MQL) mode. The grinding parameters such as wheel speed and table speed are kept constant with variations in the grinding infeed. The grinding performance in terms of grinding forces, apparent coefficient of friction, surface roughness and residual stresses on the ground surfaces have been investigated. Skewness, kurtosis and the Abbott–Firestone curve have also been analysed using two-dimensional and three-dimensional plots for an in-depth study of ground surface behaviour. The finding suggests that ZnO-based nanofluid outclass the silver-based nanofluid using MQL mode in terms of reduced grinding forces and favourable residual stress. Therefore, it appears as the potential grinding environment for the improved grinding performance of Inconel 718.

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"Optimization of Process Parameters of EDM of Inconel 617 by Taguchi Based PCA and GRA Technique and Effect of Recast Layer Formation." International Journal of Engineering and Advanced Technology 9, no. 2 (December 30, 2019): 1933–42. http://dx.doi.org/10.35940/ijeat.b2895.129219.

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Inconel materials are manufactured in various series which have differences in their chemical composition and hence in its physical and chemical properties. These alloy materials are known for their high strength, corrosion resistance and oxidation resistance. They are not easily machine-able through conventional machining, due to rapid work hardening tendency, high toughness and hardness, tendency to form built up edges, hence for their machining, non conventional machining equipments like EDM are used. A number of experiments has been performed to optimize process parameters of EDM on different series of Inconel material like Inconel 625, Inconel 718, Inconel 601, Inconel hastelloy C-276, Inconel 690 etc. by different optimization technique Taguchi, PCA, GRA etc however there is a lack of data available for optimization of process parameters of EDM machining for Inconel 617. So in this paper optimization of process parameters like Pulse on time, peak current, gap voltage have been done by taking Material Removal Rate and Tool Wear Rate as response variables. Other process parameters have been kept constant during EDM process. It is found that for different values of process parameters pattern of variation of MRR and TWR is different. Also the effect of recast layer formation on MRR and TWR has been analyzed and it is found that at high Peak Current and high Pulse on Time, tendency of formation of recast layer is high. Formation of recast layer adversely affects MRR and TWR i.e. it reduces MRR and TWR. Also Results obtained from PCA and GRA has been compared and it is found that both methods give same optimum set of process parameters but they have differences in pattern of variation of MRR and TWR.

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Soori, Mohsen, and Behrooz Arezoo. "Minimization of Surface Roughness and Residual Stress in Grinding Operations of Inconel 718." Journal of Materials Engineering and Performance, December 8, 2022. http://dx.doi.org/10.1007/s11665-022-07721-4.

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Srikanth, S., P. Saravanan, Bhawna Khalkho, and P. Banerjee. "Failure Analysis of Inconel 601 Radiant Tubes in Continuous Annealing Furnace of Hot Dip Galvanizing Line." Journal of Failure Analysis and Prevention, April 14, 2021. http://dx.doi.org/10.1007/s11668-021-01148-0.

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Chung, W. C. "A Study of Short Metal Fiber Reinforced Composite Materials." MRS Proceedings 171 (1989). http://dx.doi.org/10.1557/proc-171-379.

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ABSTRACTOver the years, the conventional involvement of short fiber reinforced composites in electrical applications has been as electrical insulation. Contrary to this approach, with the increasing need of better electromagnetic interference (EMI), radio—frequencyinterference (RFI) shielding and control of electrostatic charge distribution (ESD) for computer, defense, space exploration and some high—tech structural components, itis expected that the development of conductive polymeric composite materials will grow strongly and significantly.An experimental investigation is designed to systematically evaluate the mechanical properties and electrical properties of metal fiber reinforced composites subjected to various loading conditions. In this study, chopped Inconel 601 (nickel base) metal fiber witha fixed fiber aspect ratio (length/diameter ratio) is used to reinforce commercially available thermoset polyester resin. Mechanical testing of custom made samples, failure analyses using visual inspection, light microscopy and SEM are conducted to understand the fracture behaviors and possible failure causes in such composites. The feasibility of using metal fiber polymeric composites in structural/electrical applicationsis discussed in this paper.

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Kishore, Kamal, Sant Ram Chauhan, and Manoj Kumar Sinha. "Application of Machine Learning Techniques in Environmentally Benign Surface Grinding of Inconel 625." Tribology International, July 2023, 108812. http://dx.doi.org/10.1016/j.triboint.2023.108812.

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Ma, Yuanjun, Yutian Ding, Yubi Gao, Jianjun Chen, and Xingmao Wang. "Gradient Nanotwinned Structure and Its Formation Mechanism in Inconel 625 Alloy Produced by Surface Mechanical Grinding Treatment." Metals and Materials International, September 10, 2022. http://dx.doi.org/10.1007/s12540-022-01297-3.

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Yadav, Sunil Kumar, and Sanjeev Kumar Singh Yadav. "Experimental investigation of electrochemical cut-off grinding for Inconel-718 and comparative study with Ti-6Al-4V alloy." Advances in Materials and Processing Technologies, July 31, 2023, 1–16. http://dx.doi.org/10.1080/2374068x.2023.2241802.

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Singh, Shambhavi, Sweety Singh, Rahul, and Rajan Choudhary. "Surface Topography and Morphological study Optimization of EDMed Work Surface of Inconel 601 obtained using solid cylindrical cross sectioned Copper tool electrode." Surface Review and Letters, June 2, 2023. http://dx.doi.org/10.1142/s0218625x23500695.

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Batt, John A., Robert Rukus, and Meyer Gilden. "General Purpose High Temperature Microwave Measurement of Electromagnetic Properties." MRS Proceedings 269 (1992). http://dx.doi.org/10.1557/proc-269-553.

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ABSTRACTAn efficient general purpose method has been developed for implementing a variety of broad band microwave measurement techniques at high temperature. Central to these techniques has been the development of a “dual-waveguide” test fixture. These techniques have been selected, out of necessity, to cover a variety of material types and geometries such as slabs, posts and sheets. These include measurement of complex permittivity and permeability using a modified Nicolson-Ross technique for slabs and Marcuwitz' algorithm for posts. In the implementation of the dual-waveguide, two adjacent and symmetric X-band waveguides are machined from a single block of Inconel alloy 601*, one serving as a test waveguide, the other as a reference waveguide. The dual-waveguide is surrounded by a programmable clam-shell furnace. The reference waveguide provides data which is used to compensate for electrical and dimensional thermal changes in the test section. Combined with commonly used HP 8510 Network Analyzer methods, automated test procedures have been developed to accommodate the various measurement types and sample shapes. Prototypical data will be presented illustrating the effectiveness of some of these techniques. The methods discussed are most useful for rapid data generation over temperatures ranging from room temperature to 2000 degrees F (1093 degrees C) and at frequencies defined by the waveguide dimensions. This paper highlights developments in the dual waveguide system since its construction over one year ago.

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Albuquerque, Carlos Rodrigo Jordão de, Diego Filipe Bezerra Silva, Olímpia Crispim da Silveira, Carmen Lúcia Soares Gomes de Medeiros, and Maria Helena Chaves de Vasconcelos Catão. "Reabilitação funcional e estética de dente anterior fraturado em paciente hebiátrico: relato de caso." ARCHIVES OF HEALTH INVESTIGATION 8, no. 2 (May 14, 2019). http://dx.doi.org/10.21270/archi.v8i2.3176.

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Introdução: Após fratura decorrente de trauma e consequente tratamento endodôntico, os dentes têm sua resistência mecânica reduzida, sendo necessária, em alguns casos, a utilização de um retentor intrarradicular. Objetivo: Descrever um caso clínico de reabilitação de um dente anterior que apresentava fratura decorrente de trauma, de um paciente adolescente. Relato do caso: Paciente do sexo masculino, 15 anos de idade, apresentou-se com a queixa da aparência estética do dente 32. Na anamnese o paciente relatou que há cerca de 1 ano havia fraturado o referido dente enquanto brincava, e que sentiu dor apenas nas primeiras horas após o acidente, não se queixando mais de qualquer sintomatologia dolorosa desde então. Ao exame radiográfico, observou-se fratura do dente 32, além da presença de imagem radiolúcida na região periapical do mesmo dente. Assim, baseado na avaliação radiográfica e após criteriosos exames com recursos semiotécnicos empregados na Endodontia, confirmou-se o diagnóstico de necrose pulpar no referido dente. Foi instituído o tratamento endodôntico previamente ao tratamento restaurador. A reabilitação consistiu inicialmente pelo tratamento endodôntico. Na sequência optou-se pela instalação de um pino de fibra de vidro (PFV). Por fim, a reconstrução coronária foi realizada de forma direta, em resina composta e com o auxílio de uma coroa de cloreto de polivinila (PVC). Conclusão: Através do resultado final obtido, concluiu-se que esta é uma alternativa rápida e viável para casos como o apresentado, proporcionando não somente o restabelecimento funcional e estético do dente, mas também satisfação e elevação da autoestima de pacientes hebiátricos.Descritores: Traumatismos Dentários; Dente não Vital; Restauração Dentária Permanente.ReferênciasMazzoleni S, Graf F, Salomon E, Simionato F, Bacci C, Stellini E. Influence of root canal posts on the reattachment of fragments to endodontically treated fractured incisors: an in vitro experimental comparison. J Esthet Restor Dent. 2016;28(2):92-101.Andersson L. Epidemiology of traumatic dental injuries. J Endod. 2013;39 (3 Suppl):S2-5.Barreto BCF, Silva GR, Bertaglia PC, Caldeira MMPS, Soares CJ, Martins LRM. Traumatismo dentário na hebiatria: relato de caso clínico. ROBRAC (Online). 2012;21(57):510-14.Flores MT, Andreasen JO, Bakland LK, Feiglin B, Gutmann JL, Oikarinen K et al. Guidelines for the evaluation and management of traumatic dental injuries. Dent Traumatol. 2001;17(2):49-52.Altun C, Tözüm TF, Güven G. Multidisciplinary approach to the rehabilitation of a crown fracture with glass-fibre-reinforced composite: a case report. J Can Dent Assoc. 2008;74(4):363-66.Cvek M, Cleaton-Jones PE, Austin JC, Andreasen JO. Pulp reactions to exposure after experimental crown fractures or grinding in adult monkeys. J Endod. 1982;8(9):391-97.Lee R, Barrett EJ, Kenny DJ. Clinical outcomes for permanent incisor luxations in a pediatric population. II. Extrusions. Dent Traumatol. 2003;19(5):274-79.Aleisa K, Al-Dwairi Z, Alghabban R, Glickman G, Hsu ML. Effect of cement types and timing of cementation on the retentive bond strength of fiber posts. J Dent Sci. 2012;7(4):367-72.Prado MAA, Kohl JCM, Nogueira RD, Geraldo-Martins VR. Retentores intrarradiculares: revisão da literatura. UNOPAR Cient Cienc Biol Saude. 2014;16(1):51-5.Petrie CS, Walker MP. Effect of airborne-particle abrasion and aqueous storage on flexural properties of fiber-reinforced dowels. J Prosthodont. 2012;21(4):296-303.Rocha AC, Cardoso J, Coradini SU. Reforço radicular: relato de caso clínico. Stomatos. 2009;15(28):87-93.Ausiello P, Franciosa P, Martorelli M, Watts DC. Mechanical behavior of post-restored upper canine teeth: a 3D FE analysis. Dent Mater. 2011;27(12):1285-94.Cecchin D, Farina AP, Vitti RP, Moraes RR, Bacchi A, Spazzin AO. Acid etching and surface coating of glass-fiber posts: bond strength and interface analysis. Braz Dent J. 2016;27(2):228-33.Feuser L, Araújo E, Andrada MAC. Pinos de fibra: escolha corretamente. Arq odontol. 2005;41(3):255-62.González-Lluch C, Rodríguez-Cervantes PJ, Sancho-Bru JL, Pérez-González A, Barjau-Escribano A, Vergara-Monedero M et al. Influence of material and diameter of pre-fabricated posts on maxillary central incisors restored with crown. J Oral Rehabil. 2009;36(10):737-47.Gomes GM, Gomes OM, Reis A, Gomes JC, Loguercio AD, Calixto AL. Effect of operator experience on the outcome of fiber post cementation with different resin cements. Oper Dent. 2013;38(5):555-64.Sorrentino R, Salameh Z, Zarone F, Tay FR, Ferrari M. Effect of post-retained composite restoration of MOD preparations on the fracture resistance of endodontically treated teeth. J Adhes Dent. 2007;9(1):49-56.Rosentritt M, Fürer C, Behr M, Lang R, Handel G. Comparison of in vitro fracture strength of metallic and tooth-coloured posts and cores. J Oral Rehabil. 2000;27(7):595-601.Schwartz RS, Fransman R. Adhesive dentistry and endodontics: materials, clinical strategies and procedures for restoration of access cavities: a review. J Endod. 2005;31(3):151-65.Egilmez F, Ergun G, Cekic-Nagas I, Vallittu PK, Lassila LV. Influence of cement thickness on the bond strength of tooth-colored posts to root dentin after thermal cycling. Acta Odontol Scand. 2013;71(1):175-82.Baba NZ, Golden G, Goodacre CJ. Nonmetallic prefabricated dowels: a review of compositions, properties, laboratory, and clinical test results. J Prosthodont. 2009;18(6):527-36.Clavijo VGR, Souza NC, Andrade MF, Susin AH. Pinos anatômicos: uma nova perspectiva clínica. Rev dental press estét. 2006;3(3):100-21.Conceição EN. Dentística: saúde e estética. Porto Alegre: Artmed; 2007.Maurício P, Reis J. Tendências na reabilitação de dentes com tratamento endodôntico em prótese fixa. Revista OMD. 2014;2-8.Bastos PCA, Faria DE, Bridi EC, Amaral FLB, França FMG, Flório FM et al. Push-out bond strength and sealing ability of etch-and-rinse and self-etching adhesives used for fiberglass dowel bonding at different depths of the root canals. Rev odontol UNESP. 2011;40(4):174-81.da Silva NR, Aguiar GCR, Rodrigues MP, Bicalho AA, Soares PBF, Veríssimo C et al. Effect of resin cement porosity on retention of glass-fiber posts to root dentin: an experimental and finite element analysis. Braz Dent J. 2015;26(6):630-36.Bottino MA, Quintas AF, Miyashita E, Giannini V. Núcleos. In: Estética em reabilitaҫão oral: metal free. São Paulo: Artes Médicas; 2011.Dallari, A. Comunicação pessoal, Brescia, 2001. In: Scotti, R. Pinos de fibra-considerações teóricas e aplicações clinicas. Artes Médicas; 2003.Grandini S, Sapio S, Goracci C, Monticelli F, Ferrari M. A onestep procedure for luting glass fibre posts: an SEM evaluation. Int Endod J. 2004;37(10):679-86.

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