Qualification: 
Ph.D, M.E, BE
Email: 
jagadesht@am.amrita.edu

Dr. T. Jagadesh currently serves as an Assistant Professor (Selection Grade) in the Department of Mechanical Engineering, School of Engineering, Amrita Vishwa Vidyapeetham, Amritapuri campus, Kerala. He received his BE in Mechanical Engineering from Institute of Road and Transport Technology, Erode and M.E. in Manufacturing Engineering from Madras Institute of Technology, Anna University, Chennai, in 2009 and 2011 respectively. He received his Ph. D. degree in Mechanical Engineering from Indian Institute of Technology, Madras in 2016. He has been a Post Doctoral Fellow in Mechanical Engineering from Indian Institute of Technology Madras during March to May 2016. He worked as an Assistant Professor in Kongu Engineering College, Perundurai, from July 2011 to December 2011 and June 2016 to May 2017. His active areas of research are Micromachining, Process modeling, Finite element modeling of manufacturing processes, design and development of micro-machine tool, cryogenic machining, Powder metallurgy, composites.

Achievements/ Award

  • Secured centum in Maths and Science in SSLC.
  • Received Research award in 58th Institute day at IIT Madras
  • Post doctoral fellowship during March to May 2016 at IIT Madras

Industrial Exposure

Industrial Visits

  • ISRO Satellite Centre, Bengaluru
  • Simpson Co Ltd, Chennai.

In plant Trainings 

  • CIFNET, Kochi 
  • Sree Saradhambal Automobiles Pvt. Ltd., Coimbatore
  • Mettur Thermal Power Plant Station

Publications

Publication Type: Journal Article

Year of Conference Publication Type Title

2018

Journal Article

P. V saradhi, Shashank, V., P teja, S., T. Jagadesh, Anbarasu, G., and Bharat, A., “Prediction of surface roughness and material removal rate in laser assisted turning of aluminium oxide using fuzzy logic”, Materials Today: Proceedings, 2018.

2017

Journal Article

T. Jagadesh and Samuel, G. L., “Finite Element Simulations of Micro Turning of Ti-6Al-4V using PCD and Coated Carbide tools”, Journal of The Institution of Engineers (India): Series C, vol. 98, pp. 5–15, 2017.[Abstract]


The demand for manufacturing axi-symmetric Ti-6Al-4V implants is increasing in biomedical applications and it involves micro turning process. To understand the micro turning process, in this work, a 3D finite element model has been developed for predicting the tool chip interface temperature, cutting, thrust and axial forces. Strain gradient effect has been included in the Johnson–Cook material model to represent the flow stress of the work material. To verify the simulation results, experiments have been conducted at four different feed rates and at three different cutting speeds. Since titanium alloy has low Young's modulus, spring back effect is predominant for higher edge radius coated carbide tool which leads to the increase in the forces. Whereas, polycrystalline diamond (PCD) tool has smaller edge radius that leads to lesser forces and decrease in tool chip interface temperature due to high thermal conductivity. Tool chip interface temperature increases by increasing the cutting speed, however the increase is less for PCD tool as compared to the coated carbide tool. When uncut chip thickness decreases, there is an increase in specific cutting energy due to material strengthening effects. Surface roughness is higher for coated carbide tool due to ploughing effect when compared with PCD tool. The average prediction error of finite element model for cutting and thrust forces are 11.45 and 14.87 {%} respectively. More »»

2017

Journal Article

T. Jagadesh and Samuel, G. L., “Influence of deep cryogenic treatment and in-situ cryogenic micro turning of Ti-6Al-4V on cutting forces, surface integrity and chip morphology”, International Journal of Machining and Machinability of Materials, 2017.

2015

Journal Article

T. Jagadesh and Samuel, G. L., “Mechanistic and Finite Element Model for Prediction of Cutting Forces During Micro-Turning of Titanium Alloy”, Machining Science and Technology, vol. 19, pp. 593-629, 2015.[Abstract]


Titanium alloy Ti-6Al-4V is commonly used in biomedical applications due to its superior properties such as biocompatibility, high strength-to-weight ratio and corrosion resistance. To understand the mechanics of the micro-turning process of these alloys, a mechanistic model has been developed for predicting the cutting forces. A modified Johnson–Cook material model with strain gradient plasticity is used to represent the flow stress of work material. The micro-turning experiments were conducted to verify the cutting forces predicted by mechanistic model. A finite element model is also developed with different shear friction factors and calibrated using experimental results to confirm and interpret the results of mechanistic model. It is inferred that strain rate increases by increasing cutting speed, whereas it decreases with increase in the feed rate due to increase in adiabatic shear band spacing. Since Ti-6Al-4V has low thermal conductivity, when cutting speed increases, there is an increase in the tool-chip interface temperature that leads to decrease in cutting forces. When cutting speed increases, chip morphology changes from discontinuous to continuous, and there is significant deterioration in the surface finish. It is observed that the average cutting force prediction errors for mechanistic and finite element models are 9.69% and 11.45% respectively. More »»

2014

Journal Article

T. Jagadesh and Samuel, G. L., “Investigations into Cutting Forces and Surface Roughness in Micro Turning of Titanium Alloy Using Coated Carbide Tool”, Procedia Materials Science, vol. 5, pp. 2450 - 2457, 2014.[Abstract]


Micro turning is one of the tool based micromachining process used for manufacturing axi-symmetric miniaturized parts. This paper presents the development of micro turning setup and investigations on cutting forces and surface roughness during micro turning process. Titanium alloy (Ti6Al4V) and coated carbide tool (TiN/AlTiN) is considered as work piece and tool material respectively. Experiments have been conducted by varying the cutting speed, feed and depth of cut. Piezoelectric dynamometer is used to measure the cutting forces during the process. Cutting forces decreases by increasing the cutting speed due to thermal softening where as at low depth of cut, cutting forces increases with increase of cutting speed due to material strengthening effect. Surface roughness increases when uncut chip thickness is less than the edge radius, due to rubbing and ploughing action. Improved roughness is observed when uncut chip thickness and depth of cut is greater than edge radius.

More »»

Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2018

Conference Proceedings

T. Jagadesh and Naveen, T. K., “Experimental investigations into performance evaluation of thermosyphon solar heating system using modified PCM modules”, FLAME- 2018 . 2018.

2017

Conference Proceedings

T. Jagadesh and L, S. G., “Finite Element Modeling for Prediction of Cutting Forces during Micro Turning of Titanium Alloy”, COPEN- 10, IIT Madras. 2017.[Abstract]


In the past few years there is a rise in demand for sustainable micro turned titanium alloy components in the field of aeronautical and biomedical industries. But the major issues in micro turning of Ti-6Al-4V are fluctuations in the cutting force due to saw-tooth chip formation, chip adhesion on the cutting tool due to chemical affinity and high temperature in the tool-chip interface zone due to low thermal conductivity. So the experimental analysis of addressing these issues of titanium alloy are expensive. In view of this, in the present work, a finite element simulations are developed to understand the process mechanics and also to predict the cutting, thrust and feed forces, tool-chip interface temperature and chip morphology during dry and in-situ cryogenic micro turning process. Finite element simulations are developed using updated lagrangian approach by taking into account of edge radius, liquid nitrogen cooling and work hardening effects. A cylindrical heat exchange window is used in the simulation for in-situ cryogenic cooling. Finite element simulations are calibrated for various shear friction factors and finally validated with the forces and chip morphology results measured experimentally. It is inferred that in-situ cryogenic micro turning results in favorable chip formation, less tool-chip interface temperature and minimize the formation of saw-tooth chip which lead to increase the overall accuracy and precision of micro turned titanium alloy implants. However there is an increase in cutting forces when compared with dry machining due to cryogenic cooling and size effects. More »»

2015

Conference Proceedings

T. Jagadesh and Samuel, G. L., “Investigations into cutting forces, surface roughness, and chip morphology during micro turning of cryogenically treated titanium alloy”, Advances in materials and processing technologies conference, AMPT 2015, Universidad Carlos III de, Madrid, Spain. 2015.

2014

Conference Proceedings

T. Jagadesh and Samuel, G. L., “Finite Element Modeling for Prediction of Cutting Forces during Micro Turning of Titanium Alloy”, All India Manufacturing Technology, Design and Research Conference, AIMTDR 2014, IIT Guwahati. 2014.

2011

Conference Proceedings

T. Jagadesh and Rajadurai, A., “Study on composites made by Powder Metallurgy using Microwave Sintering”, National conference on recent trends in Mechanical Engineering, 26th March 2011, at GKM college of Engineering and Technology, Chennai. 2011.

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