Author
R. Oyyaravelu
Bio: R. Oyyaravelu is an academic researcher from VIT University. The author has contributed to research in topics: Machining & Welding. The author has an hindex of 8, co-authored 20 publications receiving 170 citations.
Topics: Machining, Welding, Surface roughness, Surface finish, Lubrication
Papers
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TL;DR: Tensile results suggested that the laser welding process had improved the weld strength even without any weld preheat treatment and also the fractography of the tensile fractured samples showed the ductile mode of failure.
55 citations
TL;DR: In this article, the effects of different grinding environments such as dry, minimum quantity lubrication (MQL) and Cryo-MQL on performance, such as grinding force, temperature, surface roughness and chip morphology on Inconel 751, a higher heat resistance material posing thermal problems and wheel loading.
34 citations
TL;DR: In this paper, an attempt has been made to understand the effect of heat treatment on the microfissuring of Inconel 718 sheets, which were solutionized at 980 °C and 1066 °C for the period of 1 hour soaking used were subsequently cooled by furnace cooling (FC) and iced brine quenching (ICE).
34 citations
TL;DR: In this article, electric discharge deep hole drilling of Inconel 718 was experimented with three different commercial tube electrodes, viz., copper, copper-tungsten and graphite, and the experimental results indicated that copper electrode outperformed graphite electrodes with regard to material removal rate (MRR), Electrode Wear Ratio (EWR), and Surface Roughness (SR).
26 citations
TL;DR: In this paper, a comparative study of the cutting forces, surface roughness and analysis of tool wear while machining of Inconel 718 under different sustainable machining environments such as dry, minimum quantity lubrication (MQL), cryogenic, cold air and MQL, MQL and cryogenic.
19 citations
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TL;DR: In this article, the main objective of this research is to maximize the hole circularity along with minimum hole taper and dilation by selecting the optimal input parameters, from the results it has been found that discharge current is the most effective parameter for the given conditions.
265 citations
TL;DR: In this paper , the authors present a systematic scheme of drilling damage suppression from the overall drilling system, including the formation mechanism of damage at different hole positions, including exit push-out delamination, entrance peel-up delamination and fiber pull-out, and the suppression strategies are systematically reviewed from the following four aspects: drilling techniques and methods, drilling conditions, tool design, and multi-techniques integration.
143 citations
01 Jan 2003
TL;DR: In this paper, the effects of pulse energy, pulse frequency, powder mass flow rate and spot overlap on the clad layer height, dilution and heat-affected zone (HAZ) have been examined.
Abstract: A systematic research into the cladding of stellite 6 on stainless steel by pulsed Nd:YAG laser has been carried out. The effects of pulse energy, pulse frequency, powder mass flow rate and spot overlap on the clad layer height, dilution and heat-affected zone (HAZ) have been examined. It was found that both the clad height and penetration into the substrate increase with the pulse energy, spot overlap and pulse frequency, but the effects of these parameters on dilution are complex. The dilution reaches the lowest value (4%) at the incident energy of 18 and 25 J/ pulse, spot overlap of 89% and pulse frequency of 40 Hz. The powder mass flow rate of 22 g/min (for energy of 25 J/pulse and spot overlap of 83%) produces thick clad layer with low dilution but results in the formation of defects. The hardness of the clad layer decreases linearly with increasing dilution. No cracks have been found in single-track clad layers at a spot overlap of 89%, however, cracks occurred at lower spot overlap. These cracks were eliminated by the multi-track cladding when the track increment is less than 1/3 of the width of track, which is believed to be due to the remelting or heat treatment of the previous clad track by the subsequent track. The track bands in multi-track clad show coarser structure, higher element segregation and lower hardness.
136 citations
TL;DR: In this article, the effect of some cooling conditions on machinability of tool wear, tool-chip interface temperature, and surface roughness were evaluated in terms of machining performance.
91 citations