A comparative appraisal of sustainable strategy in Ultrasonic Assisted Grinding of Nimonic 80A using novel green atomized cutting fluid


 Ultrasonic assisted magnetic abrasive flow machining (UAMAFM) process shows enhanced finishing performance compared to conventional abrasive flow machining (AFM). In this present research paper, mathematical models for (MR) and Ra have been developed for the UAMAFM process by considering both steady state and transient phenomena. The external ultrasonic and magnetic field assistance enhanced the velocity and length of contact of active abrasives, calculated from the kinematic analysis. The resultant finishing forces have also been evaluated by considering these external aids. The steady state material removal per finishing cycle remains constant and depends on the velocity of motion, length of contact, resulting forces, number of active abrasives, and work material hardness. The transient material removal per finishing cycle was calculated in terms of the volume of irregularities present over the work surface, i.e., initial surface roughness. The mathematical model for surface roughness was developed in terms amount of material removed (MR), and initial (R(a0)) and critical surface roughness (R(acr)). The predicted values of material removed and surface roughness from developed mathematical models agreed with experimental results with a deviation of 7.80% and 2.44%, respectively.

Mathematical modeling of material removal and surface roughness in ultrasonic assisted magnetic abrasive flow machining process

Experimental investigations into tribological and machining characteristics of Al2O3 and ZrO dispersed Jatropha oil-based nanofluids

Development of pulse-assisted cryo-micro lubrication architecture for machining of Ti-based alloys: A frugal innovative attempt for a hybrid lubri-cooling technique


 In the present work, a novel lubricant has been extracted from mango (Mangifera indica L.) seeds using the soxhlet technique. Lubricants from agricultural waste can reduce the shortage of edible oils and eliminates the need to dispose them. Therefore, non-edible oils are economical comparable with edible oils. In order to validate the effectiveness of extracted lubricant, thermophysical characterization and tribology tests were performed. The obtained results were compared with edible and non-edible oils, such as sunflower oil (SFO) and mahua seed oil (MaSO) respectively. Friction tests were conducted using tribometer with pin-on-disk (WC-Co/Ti-3Al-2.5V) at different tribological conditions. Worn surface and wear mechanism of disks were examined using a scanning electron microscope (SEM) associated with energy-dispersive spectroscopy (EDS) in order to determine the quantitative comparison of elemental composition. These findings showed that mango seed oil (MSO) exhibited lowest coefficient of friction and wear volume followed by dry, SFO, and MaSO respectively. SEM analysis showed that no plowing was observed, however small pits and cracks were found on wear track under MSO.

Dungavath Narayana Swamy Naik

Papers

Thermophysical investigations of Mango seed oil as a novel cutting fluid: A sustainable approach towards waste to value addition

Development of pulse-assisted cryo-micro lubrication architecture for machining of Ti-based alloys: A frugal innovative attempt for a hybrid lubri-cooling technique