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Wire spark erosion machining of Ni rich NiTi shape memory alloy for bio-medical applications

Wire spark erosion machining of Ni rich NiTi shape memory alloy for Bio-Medical applications

VIKOR-Regression-PSO based hybrid approach for optimization and analysis of green machining of SS304

  • Authors: Gupta, Kapil
  • Date: 2020
  • Subjects: Green machining , Hybrid optimization , PSO
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/411319 , uj:34560
  • Description: Abstract: The selection of machining to process SS304 in an economical and eco-friendly way is the challenging task for the manufacturing engineers. The complication becomes at its peak due to the categorization of SS304 as difficult to machine material. In the current research, an attempt has been made to machine SS304 material using synthetic oil based cutting fluid. The machining variable selected as input process parameter are cutting speed (CS), feed (F) and depth of cut (DoC). The response characteristics measured and analyzed corresponding to L9 orthogonal array (Taguchi based) are tool wear, maximum surface roughness (Rt), mean roughness depth (Rz) and chip reduction coefficient (CRC). The optimization of the input process parameters was also attempted using hybrid approach of Vise Kriterijumska Optimizacija Kompromisno Resenje-Regression- Particle Swarm Optimization (VIKOR-Regression-PSO). The process parameters were optimized for each response individual and after that comparison was made with the responses obtained at the optimized setting suggested by hybrid approach for all responses simultaneously. The suggested optimized setting by hybrid approach was CS: 70m/min; F: 0.2mm/rev; DoC: 1.5mm. The response characteristics were validated after performing validation experiments as suggested optimal setting. The ±5% difference between predicted and experimental values reveals the authenticity of the hybrid optimization approach. During the machining of SS304, synthetic oil with synthetic ester (with appropriate mixture with water) was used as a cutting fluid to make the process as environment-friendly. Finally, the response characteristics after green machining at randomly selected experiments were compared to the results of dry machining and the outperformance of synthetic oil was measured in terms of response characteristics.
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TOPSIS-Fuzzy-PSO Integrated Modelling and Computation of Wire-EDM Parameters for Productivity and Surface Quality while Machining Ni55.8Ti Shape Memory Alloy

  • Authors: Gupta, Kapil
  • Date: 2020
  • Subjects: Computation , Optimization , PSO
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/411327 , uj:34561
  • Description: Abstract: Modelling and optimization of manufacturing processes for better quality engineered parts has always been a requirement. Numerous statistical and soft computing techniques have been used for this purpose. This paper reports on modelling and computation of Wire-EDM process parameters for optimum productivity and surface quality when machining Ni55.8Ti shape memory alloys using a TOPSIS-Fuzzy-PSO integrated hybrid technique. Ni55.8Ti is an important biomaterial and its appropriate machining at optimum set of parameters is essential to achieve high process productivity and to simultaneously maintain high product quality. Productivity in terms of material removal rate ‘MRR’ and surface quality in the form of maximum roughness ‘Rt’ and recast layer thickness ‘RCL’ have been considered. Four wire-EDM parameters namely servo voltage ‘SV’, pulse-on time ‘Pon’, pulse-off time ‘Poff’, and wire feed rate ‘WF’ have been varied at four levels each to machine Ni55.8Ti alloy based on Taguchi L16 robust design of experiment technique and the aforementioned conflicting responses have been measured corresponding to each experiment. To establish the relationship between wire-EDM parameters and the responses, all the response characteristics were converted into a single response of TOPSIS-fuzzy performance index (TFPi). PSO coupled with TOPSIS and Fuzzy logic has been employed for computation of optimum wire-EDM parameters for the best values of all responses considered. Analysis of variance (ANOVA) of TOPSIS-fuzzy performance index (TFPi) exhibited the effectiveness of the integrated hybrid technique. The optimum values of wire-EDM parameters obtained by hybrid technique are SV-50V; Pon-1µs; Poff-17 µs; WF-4 m/min for MRR-0.049 g/min, Rt- 11.45 µm, and RCL- 22.10 µm. Validation experiments conducted to confirm the reproducibility of the response characteristics predicted by hybrid technique.
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Surface morphology investigation of miniature gears manufactured by abrasive water jet machining

  • Authors: Gupta, Kapil , Khan, Adam , Pathak, Sunil
  • Date: 2020
  • Subjects: Abrasive , Gear , Machining
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/425958 , uj:36489
  • Description: Abstract: In this paper, surface morphology investigation of miniature spur gears manufactured by abrasive water jet machining is discussed. Water jet pressure, abrasive flow rate and standoff-distance are the varying input parameters to study the surface morphology (surface roughness and topography) of the machined gears. From the investigation, the water jet pressure has highly influenced (with 47% contribution) the surface quality and found as a predominant process parameter. SEM micrograph study found that wear scars and clinging effects are the major surface defects found over the machined surfaces of the gear teeth. Maximum and minimum peaks of the wear tracks are observed with white light spectroscope. The best surface morphology with average surface roughness value 1.08 µm was achieved at 350MPa water jet pressure, 225 g/min abrasive mass flow rate, and 1mm stand-off distance. The present work identifies the potential of AWJM process for manufacturing of high quality miniature gears.
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Structural analysis on mild-steel and aluminium brake disk for application on belt conveyor

  • Authors: Chelopo, Daniel , Gupta, Kapil
  • Date: 2020
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/460211 , uj:40946 , Citation: Daniel Chelopo and Kapil Gupta 2020 IOP Conf. Ser.: Mater. Sci. Eng. 971 042056
  • Description: Abstract: A disk brake system has three essential functions, namely, reducing the moving conveyor speed, preserving its steady downhill speed and stopping the conveyor fully during normal or emergency operation. There has been a persistent demand in recent years for light weight disks with highly efficient energy-absorbing structures and materials in the overall conveyor system. This aspiration has led to experimental work in attempt to use various materials for engineering designs. In this article, a rotating annular disc subjected to in-plane frictional loads is analytically modelled on the brake system. In order to obtain modal properties of breaking for inputs into the finite element model, the experimental modal test of disc brake device free under free boundary conditions is performed. The goal of this research is to recognize various properties that may in future enable us to optimize working parameters and increase braking system efficiency. The findings will enable us to achieve the optimal functionality of this structure to improve the operational disc life or performance. The aim of this document is to examine stress concentration, structural deformation and brake disk contact pressure during a single braking stop event using ANSYS 19.2 academic finite element software. This research therefore provides an important guide to the design and engineering of the brake disk and the brake pad. Structural and stress analysis are therefore preferred to pick the lightweight material for improved performance. Consequently, the lightweight material may be recommended to reduce the conveyor working load and preserve operational energy consumption, provided that light weight will satisfy working duty requirements. Comparing the results achieved with those of the technical literature, the simulation is satisfactory.
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Recent developments in sustainable manufacturing of gears: a review

  • Authors: Gupta, Kapil , Laubscher, R.F. , Davim, J. Paulo , Jain, N.K.
  • Date: 2016
  • Subjects: Sustainable manufacturing , Gear machining , Minimum quantity lubrication
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/123571 , uj:20813 , Citation: Gupta, K. 2016. Recent developments in sustainable manufacturing of gears: a review.
  • Description: Abstract: Environment awareness is of the utmost importance to all socially responsible manufacturers. To be competitive on a global scale manufacturing needs to be aligned with various strict environmental regulations. The manufacturing industry at large is striving to improve productivity and product quality while maintaining a clean and sustainable environment. This can only be achieved by adopting sustainable techniques of manufacturing which include minimizing the number of manufacturing steps by employing advanced and alternative methods, environment-friendly lubricants and lubrication techniques while machining, reducing wastage, active waste management and minimizing energy consumption etc. Gear manufacturing industries, the major service providers to all other industrial and manufacturing segments are also focusing on to implement the techniques targeting overall sustainability. Some of the recent developments to achieve sustainability in gear manufacturing can be summarized as reducing the use of mineral-based cutting fluids by employing alternative lubrication techniques i.e. minimum quantity lubrication (MQL) and dry machining, material saving, waste reduction, minimizing energy consumption and maintaining economic efficiency by reducing the number of gear manufacturing stages (eliminating the necessity of finishing processes) by utilizing advanced methods such as gear rolling and wire electric-discharge machining (WEDM), and finally increasing productivity by minimizing tool wear at high gear cutting speeds through the use of alternative tool materials and coatings. This paper reviews and amasses the current state of technology for sustainable manufacturing of gears and also recommends ways to improve the productivity and quality while simultaneously ensuring environmental sustainability.
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Recent developments in sustainable manufacturing of gears : a review

  • Authors: Gupta, Kapil , Laubscher, R.F. , Davim, J. Paulo , Jain, N.K.
  • Date: 2015
  • Subjects: Sustainable manufacturing , Gear machining , Minimum quantity lubrication
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/72392 , uj:18273 , Citation: Gupta, K. et al. 2015. Recent developments in sustainable manufacturing of gears : a review.
  • Description: Abstract: Environment awareness is of the utmost importance to all socially responsible manufacturers. To be competitive on a global scale manufacturing needs to be aligned with various strict environmental regulations. The manufacturing industry at large is striving to improve productivity and product quality while maintaining a clean and sustainable environment. This can only be achieved by adopting sustainable techniques of manufacturing which include minimizing the number of manufacturing steps by employing advanced and alternative methods, environment-friendly lubricants and lubrication techniques while machining, reducing wastage, active waste management and minimizing energy consumption etc. Gear manufacturing industries, the major service providers to all other industrial and manufacturing segments are also focusing on to implement the techniques targeting overall sustainability. Some of the recent developments to achieve sustainability in gear manufacturing can be summarized as reducing the use of mineral-based cutting fluids by employing alternative lubrication techniques i.e. minimum quantity lubrication (MQL) and dry machining; material saving, waste reduction, minimizing energy consumption and maintaining economic efficiency by reducing the number of gear manufacturing stages (eliminating the necessity of finishing processes) by utilizing advanced methods such as gear rolling and wire electric-discharge machining (WEDM) and finally increasing productivity by minimizing tool wear at high gear cutting speeds through the use of alternative tool materials and coatings. This paper reviews and amasses the current state of technology for sustainable manufacturing of gears and also recommends ways to improve the productivity and quality while simultaneously ensuring environmental sustainability.
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Recent developments in laser cutting of metallic materials

  • Authors: Anghel, Cristina , Gupta, Kapil , Mashamba, Able , Tien-Chen, Jen
  • Date: 2018
  • Subjects: Heat affected zone , Kerf width , Laser cutting
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/288767 , uj:31314 , Citation: Anghel, C. et al. 2018. Recent developments in laser cutting of metallic materials.
  • Description: Abstract: Laser cutting has become an extensively used method of material removal with cost effective solutions for complex manufacturing processes. Consequently, the process has become an area of intense research and development activity where researchers and industry experts are focusing on maximizing the productivity and reducing the cost while maintaining a high quality. Laser cutting, as the prevalent application of laser beam machining (LBM), offers a competitive advantage over conventional cutting processes in terms of material savings due to narrow kerf width, less heat affected zone and minimum distortions. The process offers high precision and good surface quality, with no tool wear and easy automation. The current paper aims to present an overview on the recent research on laser cutting of metallic materials, in terms of process monitoring and control as well as modeling and optimization, and to summarize the past five years of research on the topic.
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Recent developments in additive manufacturing of gears : a review

  • Authors: Gupta, Kapil
  • Date: 2018
  • Subjects: Additive manufacturing , Gear , Miniaturization
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/279985 , uj:30079 , Citation: Gupta, K. 2018. Recent developments in additive manufacturing of gears : a review.
  • Description: Abstract: Additive Layer Manufacturing (ALM) is an advanced technology to produce quality gears of metals and plastics. Some significant benefits such as capability to handle complex gear shapes and design, and produce near net-shaped gears; resource efficiency; and rapid product development etc. make this process a sustainable alternate to the other processes of gear manufacturing. This paper sheds light on the development of some of the important additive layer manufacturing processes such as Stereolithography, Fused Deposition Modeling, and 3D Printing to manufacture gears. The article aims to facilitate researchers and encourages them to do further research and development for improved gear quality, process productivity, and sustainability.
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Predictive modelling and parametric optimization of minimum quantity lubrication assisted hobbing process

  • Authors: Kharka, Vishal , Jain, Neelesh Kumar , Gupta, Kapil
  • Date: 2020
  • Subjects: MQL , MQLAH , Hobbing
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/438734 , uj:38144 , Citation: Kharka, V., Jain, N.K. & Gupta, K. 2020. Predictive modelling and parametric optimization of minimum quantity lubrication assisted hobbing process.
  • Description: Abstract: This paper focuses on parametric analysis, modelling, and parametric optimization of minimum quantity lubrication assisted hobbing (MQLAH) using environment friendly lubricant for manufacturing superior quality spur gears. Influences of hob cutter speed, axial feed, lubricant flow rate, air pressure and nozzle angle on the deviations in total profile, total lead, total pitch and radial runout and flank surface roughness parameters were studied by conducting 46 experiments using Box-Behnken method of response surface methodology. Results revealed that effect of air pressure is negligible but other parameters have significant impact on the considered responses. Back propagation neural network (BPNN) model was developed to predict microgeometry deviations and flank surface roughness values of the MQLAH manufactured spur gears. The BPNN predicted results found to be very closely agreeing with the corresponding experimental results with mean square error as 0.0063. Real-coded genetic algorithm (RCGA) was used for parametric optimization of MQLAH process to simultaneous minimization of microgeometry deviations and flank surface roughness. Standardized values of the optimized parameters were used to conduct confirmation experiment whose results had very good closeness with RCGA computed and BPNN predicted values and produced spur gear of superior quality. This study proves MQLAH to be a potential sustainable replacement of conventional flood lubrication assisted hobbing for manufacturing cylindrical gears of better quality.
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Performance analysis of cow dung as an eco-friendly binder and additive material for sustainable moulding and casting

Performance analysis of cow dung as an eco-friendly binder and additive material for sustainable moulding and casting

  • Authors: Patel, Manjunath G. C. , Gupta, Kapil , Chate, Ganesh , Parappagoudar, Mahesh B. , Sandeep, M. J. , Daivagna, U. M.
  • Date: 2019
  • Subjects: Casting , Cow-dung , Optimization
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/404615 , uj:33939 , Citation: Patel, M.G.C. 2019. Performance analysis of cow dung as an eco-friendly binder and additive material for sustainable moulding and casting.
  • Description: Abstract: In the present work, an attempt is made to partially replace the high cost silica sand with sustainable eco-friendly material, namely cow-dung. Practical utility of cow dung as a binding and additive material in foundries has been tested in the present work. Taguchi method is used to plan and conduct nine experiments with three replicates each. Pareto analysis of variance study is done to understand the practical significance of moulding sand variables namely percent of cow dung, percent of clay, percent of water, and degree of ramming on sand mould properties. The conflicting multiple objective functions (maximize: mould hardness, and minimize: collapsibility and gas evolution) are optimized by utilizing data envelopment analysis ranking (DEAR) method. The optimal parameter levels i.e. 6% of clay, 4% of water, 5% of cow-dung and 4 numbers of ramming strokes are obtained by applying hybrid Taguchi- DEAR method. These parameters yielded the best moulding properties i.e. mould hardness 55, gas evolution 5.9 ml/gm , and collapsibility 470 g/cm2. Thereafter, Lovejoy coupling made of aluminium is cast in the sand mould prepared with cow-dung and without cow-dung. The sand mould is prepared with the optimum set of parameters and the casting produced in the mould has been tested for its quality characteristics. The mechanical properties, surface finish, and microstructure of the casting made in sand mould with cow-dung are found to be better than that obtained with sand mould without cow-dung. The present research work is found to be more useful in foundries for sustainable production of good quality casting.
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On Surface Morphology of Miniature Gears of Stainless Steel Manufactured by CO2 Laser Cutting

  • Authors: Gupta, Kapil
  • Date: 2020
  • Subjects: Gear , Laser , Miniature
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/411343 , uj:34563
  • Description: Abstract: In this research, CO2 laser cutting process is used to manufacturing miniature gears of stainless steel 304. The aim of this research is to study the influence of laser process parameters i.e. laser power, gas flow pressure, laser scan rate and focal position on surface quality of the laser machined miniature gears. The field emission scan electron microscope (FESEM) is used to analyse the different regimes of machined surface and white light spectroscope for 3D surface profile mapping. The laser power is the predominant input factor for surface wear and it was in the form of surface oxides at high voltage of 2500W. In addition to surface analysis, the effect of laser heat source over the gear profile is also studied. The transformation in the microstructure of the gears is observed with metallurgical microscope following standards. The effect of heat source has produced twin in grain structure and lead to surface hardness. Optimal laser power of 2000 W with a scan rate of 2mm/min has produced best gear profile than other combinations.
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On productivity of abrasive water jet machining for miniature gear manufacturing

  • Authors: Gupta, Kapil
  • Date: 2020
  • Subjects: Quality , Productivity , Sustainability
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/411272 , uj:34554 , Citation: Kapil Gupta 2020 IOP Conf. Ser.: Mater. Sci. Eng. 709 044100 , DOI:10.1088/1757-899X/709/4/044100
  • Description: Abstract: Quality, productivity, and sustainability are three major indicators to evaluate the performance of any manufacturing process. Abrasive water jet machining (AWJM), which is an advanced or nonconventional machining process possess numerous benefits over conventional and other advanced processes for manufacturing of precision engineering components. Material removal rate directly indicates about the process productivity, and often finds contradictory to quality and sustainability. This paper reports the productivity of AWJM process while manufacturing miniature gears of brass. It is a part of experimental investigation conducted to manufacture high quality miniature brass gears using AWJM process. Taguchi L9 orthogonal array based experimental study where a total of nine experiments with two replicates each was conducted to evaluate the effect of AWJM parameters on miniature gear quality, process productivity and sustainability. AWJM parameters were optimized to enhance material removal rate and an optimum value of 18.80 mm3 /min was obtained. Furthermore, AWJM was identified as a superior to conventional machining processes for manufacturing of miniature gears.
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On heat treatment and surface characterization of spark Eeroded nickel-based superalloy developed by additive manufacturing

  • Authors: Khan, Adam M. , Gupta, Kapil
  • Date: 2020
  • Subjects: Electron microscopy , Hardness , Laser sintering
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/411167 , uj:34541 , Citation: Khan, A.M. & Gupta, K. 2020. On heat treatment and surface characterization of spark Eeroded nickel-based superalloy developed by additive manufacturing.
  • Description: Abstract: In this study, a nickel-based superalloy Inconel 718 material was developed through direct metal laser sintering process. To enhance the mechanical properties, printed material is heat treated at two different conditions in the combination of solution and aging. The transformation of microstructure from original anisotropic phase are studied using optical microscope. The change in mechanical properties were evaluated. The hardness of the heat- treated samples obtained are 35HRC and 39HRC for the heat treatment plan at 1100˚C + 845˚C and 980˚C + 720˚C (solution + ageing) respectively. Further, micro holes were machined on these two material samples using spark erosion micro machining or micro electric discharge machining (µEDM) process. Applied voltage, capacitance, and material hardness were three major variable parameters. Experiments are performed with hollow tungsten carbide rod of 300µm in diameter as a drill tool rotating at a speed 1500rpm for a constant machining time of 30min. Optical and scanning electron micrographs have been used to analyse the hole quality and therefore the performance of µEDM. Perfect concentric drill hole was produced with 35HRC sample than the other. Weld spatters and metal drops found around the surface of 39HRC sample. The range of drill hole varies to a maximum of ϕ385µm in low hardness and ϕ400µm in high hardness samples. The depth of drill hole is maximum with high hard sample at l00V and 100nF process condition. Light spectroscope – based roughness characterization revealed the minimum surface roughness measured was 6.946µm in low hard and 9.829µm in high hard material.
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MOORA-Fuzzy-Regression based Hybrid Approach for Machinability Optimization of SS304

  • Authors: Gupta, Kapil
  • Date: 2020
  • Subjects: Dry machining , Fuzzy , MCDM
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/411335 , uj:34562
  • Description: Abstract: Stainless steel has various scientific, engineering, medical, and industrial applications. It undergoes extensive machining operations to make products for the aforementioned applications. Stainless steel is a difficult-to-machine material and requires novel ways and optimum parameter combinations for better machinability. In view of this, the present work investigates the machinability of SS304 using coated and uncoated carbide tools under dry environment. The machinability indicators studied in the present work are material removal rate (MRR), chip reduction coefficient (CRC), maximum surface roughness (Rt) and tool flank wear. Fuzzy logic integrated with multi objective optimization by ratio analysis (MOORA) has been used for the prediction of performance index (PI). The PI solved by fuzzy logic and MOORA is termed as MOORA-Fuzzy performance index (MFPI). This MFPI has been solved by regression analysis to predict the optimal parametric setting for multi-criteria decision making (MCDM) approach. The parametric combination i.e. cutting speed: 170 m/min; feed rate: 0.2 mm/rev; and depth of cut: 1.5mm has obtained as the optimal setting. The ANOVA results and confirmation experiments verify the superiority of the proposed model. The experimental results at the predicted setting represent excellent results regeneration.
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Minimum quantity lubrication (MQL) assisted machining of grade-4 titanium

  • Authors: Gupta, Kapil , Laubscher, R.F.
  • Date: 2016
  • Subjects: Minimum quantity lubrication , Green machining , Taguchi robust design
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/123579 , uj:20814 , Citation: Gupta, K & Laubscher, R.F. 2016. Minimum quantity lubrication (MQL) assisted machining of grade-4 titanium.
  • Description: Abstract: This paper presents the results of an experimental investigation for turning of Grade-4 titanium with carbide cutting tool inserts with minimum quantity lubrication (MQL). Experiments were designed based on Taguchi’s L9 orthogonal array. The MQL parameters of flow rate (50-70-90 mL/hr); nozzle distance (20-30-40 mm) and air pressure (4-5-6 bar) were varied for three different levels each. Cutting speed, feed and depth of cut were fixed at 125 m/min; 0.2 mm/rev and 1 mm respectively. The grey relational method in conjunction with the Taguchi technique was used for optimizing the MQL parameters. The nozzle distance was recognized as the most significant parameter. The data further indicated that the optimum MQL parameters were a flow rate of 70 mL/hr, nozzle distance of 30 mm and air pressure of 6 bar. When compared to dry and wet cutting conditions MQL was shown to have significant advantages.
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Machining Ni-Cr-Fe based superalloy using abrasive water jet cutting process and its surface studies

  • Authors: Khan, Adam M , Gupta, Kapil
  • Date: 2019
  • Subjects: Abrasive , Machining , Superalloy
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/406781 , uj:34214 , Citation: Khan, A.M., Gupta, K. 2019 : Machining Ni-Cr-Fe based superalloy using abrasive water jet cutting process and its surface studies.
  • Description: Abstract : In this paper, the machinability of Ni-Cr-Fe based superalloy is studied using abrasive water jet cutting process. Experiments have been performed by varying the cutting process parameters namely: water jet pressure (240, 260 and 280 MPa), jet travel speed (20, 30 and 40mm/min) and stand-off-distance (1, 2 and 3mm). Material removal rate (MRR), kerf, and average surface roughness are measured as response parameters to evaluate process productivity and surface quality simultaneously. The influence of individual process parameters is identified using analysis of variance. Subsequently, the wear tracks are studied using electron microscopy. From the analysis, it is found that the jet travel speed is the most significant parameter. Conclusively, abrasive water jet cutting at 260 MPa jet pressure, 30 mm/min jet travel speed, and 1 mm stand-off-distance resulted in optimum responses i.e. kerf (0.0428), MRR (37.1835 mm3/min) and Ra (3.757 µm).
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Machinability studies on abrasive water jet machining of low alloy steel for different thickness

  • Authors: Khan, Adam M. , Gupta, Kapil
  • Date: 2020
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/411264 , uj:34553 , Citation: M Adam Khan and Kapil Gupta 2020 IOP Conf. Ser.: Mater. Sci. Eng. 709 044099 , DOI: 10.1088/1757-899X/709/4/044099
  • Description: Abstract: This paper reports some results of experimental investigation conducted on abrasive water jet machining (AWJM) of medium carbon low alloy (EN24) steel. EN24 steel samples of different thickness have been machined at various combinations of AWJM parameters. Three important AWJM parameters namely water jet pressure, nozzle traverse speed, and stand-off distance have been varied at three levels each. Three important responses i.e. material removal rate, kerf wall inclination, and surface roughness (average roughness) have been considered as the machinability indicators. The variation of these machinability indicators with a range of thicknesses of EN24 steel samples has been investigated. It is found that AWJM is capable to machine EN24 steel at very high MRR even at the increased thickness. But, surface finish deterioration is prominent with sample having higher thickness. Moreover, nozzle traverse speed is identified as the most significant parameter. It is concluded that the jet pressure of 240MPa with traverse speed of 20mm/min can produce good machinability for AWJM of EN24 Steel.
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