15 results found
Roy T, Sarkar PS, Balasubramaniam R, 2020, Non-destructive surface characterization of reverse micro-EDM-induced arrayed mu-features with varying aspect ratio, INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, Vol: 107, Pages: 2609-2622, ISSN: 0268-3768
Roy T, Datta D, Balasubramaniam R, 2020, Debris based discharge segregation in reverse micro EDM, MEASUREMENT, Vol: 153, ISSN: 0263-2241
Roy T, Balasubramaniam R, 2020, Influence of ion-rich plasma discharge channel on unusually high discharging points in reverse micro electrical discharge machining, INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, Vol: 106, Pages: 4467-4475, ISSN: 0268-3768
Roy T, Balasubramaniam R, 2020, Fabrication, characterization and comparative analysis of mechanical properties of micro features generated by reverse micro EDM, MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS, Vol: 26, Pages: 625-632, ISSN: 0946-7076
Roy T, Sabharwal TP, Kumar M, et al., 2020, Mathematical modelling of superhydrophobic surfaces for determining the correlation between water contact angle and geometrical parameters, PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, Vol: 61, Pages: 55-64, ISSN: 0141-6359
Roy T, Datta D, Balasubramaniam R, 2019, A Numerical Study for Determining the Hardness of Ti6AlV4 Alloy for Biomedical Applications, Techno-Societal 2018 Proceedings of the 2nd International Conference on Advanced Technologies for Societal Applications -, Editors: Pawar, Ronge, Balasubramaniam, Vibhute, Apte, Publisher: Springer Nature, ISBN: 9783030169626
Roy T, Balasubramaniam R, 2019, Effect of various factors influencing the generation of hemispherical micro features using non-conformal RMEDM, Journal of Micromanufacturing, Vol: 2, Pages: 110-122, ISSN: 2516-5984
<jats:p> Non-conformal reverse micro electrical discharge machining (NC-RMEDM) is a variant of conventional RMEDM developed by the present authors wherein modification in the tool is carried out to generate different shapes of micro features. In this study, the effect of various factors like flat bottom and taper bottom hole, inversing the position of tool and workpiece and changing the hole depth have been experimentally investigated to determine the optimal combination required for generating hemispherical shaped micro features. It was found that hemispherical shaped micro feature can be generated by employing tapered bottom blind hole as tool. Buoyancy assisted machining (BAM) with traverse of workpiece (anode) downwards into the tool (cathode) and vice versa, i.e., buoyancy opposed machining (BOM) with traverse of tool downwards into the workpiece were carried out to study the generation of hemispherical micro feature based on inversion of electrode positions. Although both BAM and BOM generated hemispherical shaped feature, BAM is preferred due to reduced machining time as opposed to BOM. Also, increasing the hole depths led to altering the shape of micro feature from hemispherical to cylindrical with hemispherical end and coni-spherical end. An array of hemispherical micro features was fabricated based on the finding from this study, and surface roughness analysis was carried out which showed that irrespective of the position of micro feature on the array, surface roughness at the tip and base of the micro feature is lower as compared to side portion. </jats:p>
Roy T, Sharma A, Datta D, et al., 2019, Molecular dynamics simulation of single discharge and dimensionless correlation with actual material removal in micro electrical discharge machining, MOLECULAR SIMULATION, ISSN: 0892-7022
Roy T, Datta D, Balasubramaniam R, 2019, Reverse micro EDMed 3D hemispherical protruded micro feature: microstructural and mechanical characterization, MATERIALS RESEARCH EXPRESS, Vol: 6, ISSN: 2053-1591
Roy T, Datta D, Balasubramaniam R, 2018, Numerical modelling and simulation of surface roughness of 3-D hemispherical convex micro-feature generated by reverse micro-EDM, INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, Vol: 97, Pages: 979-992, ISSN: 0268-3768
Roy T, Sharma A, Datta D, et al., 2018, Molecular dynamics study on the effect of discharge on adjacent craters on micro EDMed surface, PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, Vol: 52, Pages: 469-476, ISSN: 0141-6359
Roy T, Datta D, Balasubramaniam R, 2018, Numerical modelling, simulation and fabrication of 3-D hemi-spherical convex micro features using Reverse Micro EDM, JOURNAL OF MANUFACTURING PROCESSES, Vol: 32, Pages: 344-356, ISSN: 1526-6125
Roy T, Dutta RK, 2018, Integrated fuzzy AHP and fuzzy TOPSIS methods for multi-objective optimization of electro discharge machining process, Soft Computing, Pages: 1-11, ISSN: 1432-7643
© 2018 Springer-Verlag GmbH Germany, part of Springer Nature In the present work, the working of an electro discharge machining process was studied in which four factors, namely pulse on time, duty cycle, discharge current, and gap voltage, were considered to be the controllable parameters, each at three levels, for monitoring three responses, namely material removal rate, tool wear ratio, and tool overcut. Statistical design of experiments using Taguchi’s orthogonal array (OA) technique has been utilized to determine the optimum level of process parameters so that they are least affected by noise factors for obtaining a robust design of the parameters. Acknowledging the limitation that Taguchi’s OA technique can determine optimal setting of controllable parameters for one output or response at a time, integrated fuzzy AHP and fuzzy TOPSIS methods were used in the scheme of multi-response experiment so that Taguchi’s OA technique may be applied successfully for parametric optimization. The results show that none of the factors were highly significant although discharge current had the highest contribution (31.63%) among all.
Roy T, Sabharwal TP, Ranjan P, et al., 2018, Effect of height of micro textures fabricated by deep X-Ray lithography on surface wettablility, Pages: 105-106
© 2018 CURRAN-CONFERENCE. All rights reserved. In this study, wettability of micro textured surfaces fabricated by deep X-Ray lithography have been carried out with respect to height of micro textures to understand the degree of wetting between solid and liquid in contact. A total of 16 micro textured surfaces were fabricated which were segregated into two groups with respect to their heights viz. 50 μm and 200 μm. Measurement of water contact angles on each of the micro textured surfaces indicated that with increase in height of micro textures, water contact angle increases. Water adhesion on micro textured surface (contact angle 900) was observed where the peripheral distance between micro textures was higher than its height indicating that water droplet can easily adhere to the base of micro texture. Highest water contact angle was observed in the case of micro textured surface with maximum height of micro textures. Hence, water repellency behaviour increases with respect to increase in height of micro texture.
Roy T, Sarkar P, Datta D, et al., Recast Layer Thickness Characterization of Array of Micro Features Using X-Ray Micro Computed Tomography, SSRN Electronic Journal
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