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RISS 인기검색어
- 검색키워드
- 저자 : T. Panneerselvam (검색결과 3 건)
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Cutting tool performance analysis of P/M alloy steel under turning of copper material
T. Panneerselvam,T. K. Kandavel,T. K. Chaitanya,K. S. Tarun 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.9
Automation in machining processes requires high strength new cutting tool to co-up with high speed, feed and high-temperature working conditions. The present work is aimed to analyze the performance of newly fabricated powder metallurgy (P/M) alloy steel, Fe-0.5 %C-2 %Cu-2 %Mo-2 %Ti as a cutting tool under turning of copper material using a conventional lathe. Taguchi’s experimental design matrix is used to conduct the experiment with cutting speed, depth of cut and feed rate as working parameters. The tool performance is assessed by evaluating the surface quality of the work material. Signal-to-noise ratio employs to optimize the working parameters. The surface roughness of copper work material machined by the P/M tool is a minimum at 43.175 m/min, 0.1 mm and 0.43 mm/rev of cutting speed, depth of cut and feed rate, respectively. Finally, the experimental analysis reveals that the P/M cutting tool will exhibit a comparable performance against the conventional HSS tool.
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T. Raghavendra,Panneerselvam Kavan 한국섬유공학회 2020 Fibers and polymers Vol.21 No.11
In this study, camphor soot was infused into coir fibers using osmosis technique. Further, modified coir fibers werereinforced in nylon 6 using the melt intercalation method by varying fiber content (0, 3, 6, 9 wt. %) to obtain camphor sootembedded coir fiber reinforced nylon composites (CSCFNCs). The presence of camphor soot infused coir fibers in nylon 6matrix was confirmed through XRD peaks by forming a single peak for CSCFNCs compared to neat nylon 6. CSCFNCswere characterized for tensile strength, flexural strength, impact strength and density as per ASTM standards. Thermalbehaviour of CSCFNCs were also investigated by TGA, DSC, MFI and DMA. Tensile strength, flexural strength and densityof the CSCFNCs were enhanced compared to neat nylon 6. On the other hand, impact strength is reduced. MFI and tan δvalues for CSCFNCs shows decreased trend due to constrained polymer movement. TGA analysis for CSCFNCs showsincreased thermal stability, marginally. DSC analysis revealed two peaks at 228 °C and 468 °C corresponds to the meltingpoint and degradation temperature of CSCFNCs respectively. DMA result shows the storage modulus of 700 MPa for neatnylon 6 and it is enhanced in the case of CSCFNCs. Maximum storage modulus was recorded for 6 wt. % CSCFNCs was806 MPa. Creep study shows that 6 wt. % CSCFNCs has shown minimum impression depth 0.125 mm compared to neatnylon 6 0.212 mm. SEM reveals that the fibers are uniformly distributed in the matrix and experienced brittle fracture.
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A Novel Study on Thermal Stability of Camphor Soot Reinforced Coir Fibers
T. Raghavendra,Panneerselvam Kavan 한국섬유공학회 2018 Fibers and polymers Vol.19 No.7
Thermoplastics, reinforced with lignocellulosic fibers are usually processed at lower temperatures ranging from 100 oC to 160 oC. Further increase in temperature leads to the degradation of the fibers mechanical properties. Camphor soot reinforced coir fibers (CSRCF) based on the osmosis technique were prepared, in this study. Parameters using Design of Experiments (DOE) varied and the process is investigated for varied camphor soot concentrations (0.5, 1.0 and 1.5 wt. %), time (4, 8 and 12 hrs.) and temperature (30, 40 and 50 oC) with three levels for each parameter (L9 Orthogonal array). Relative camphor soot content in the coir fiber (RCSCF) and tensile strength are vital objective functions. Tensile tests were conducted on tensometer according to DOE, and based on analysis of variance (ANOVA). The optimal results from ANOVA were established by charting the main effect plots. The optimal combination of parameters for CSRCF were examined using X-ray diffraction (XRD), thermogravimetric analysis (TGA) and Fourier transform infrared radiation (FTIR). Further, scanning electron microscope (SEM) equipped with an energy dispersion spectroscope (EDS) examined and compared neat fibers. The results showed a considerable increase in tensile strength by about 37 % for CSRCF compared to neat fibers. XRD revealed that crystallinity index was slightly reduced for modified fibers. The TGA result reveals that thermal stability of the modified fibers improved by 15 % compared to neat fibers. FTIR analysis revealed that modified fibers experienced peak diminishing in OH, CH stretching and carbonyl groups. The Morphology study of neat and CSRCF were examined using SEM with EDS analysis which revealed 94 % carbonaceous compounds in a cross examination of modified fibers compared to the cross section of a neat coir fiber (64 %).
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