Exploring fundamental mechanisms of friction and wear at multiple length scale. 10+ years of experience in the mutli-scale tribological investigations of 2D materials, MEMS/NEMS devices, Mg alloys, High entropy alloys.
My current work is focused on conducting AFM-based tribological measurements to generate a comprehensive molecular length scale understanding of dissipation mechanisms for 2D confined structures at interfaces in non-polar alkanes.
This work was focused on developing novel conductive contact Materials for MEMS/NEMS devices, testing them in a variety of operating conditions and environments, and analyzing the results to determine the mechanisms that control their performance limits and failure mechanisms.
Master Project on Magnetorheological Brake and Magnetorheological Fluid
Research interests:
Multi-scale Tribology, Materials Science and Metallurgy, 2D Materials, Mg Alloys, High Entropy Alloys, Thin Films, Electrical Contacts, Microstructural Properties Correlation
Experimental:
Atomic Force Microscopy, Field Emission Scanning Electron Microscope, Energy-Dispersive Spectroscopy, Nano Indenter, Micro Indenter, Electron Backscatter Diffraction, Transmission Electron Microscope, 3D Profilometer, X-Ray Diffraction, Tensile Testing, Raman Spectroscopy, Optical Microscope, Sputtering, Tribometer, Vacuum Technology, Clean Room Technology
Softwares:
Originpro, MS Office, Ansys, MD Simulations (elementary), MATLAB, AutoCAD
Gold Medal in Masters (NIT Srinagar), Research Scholar Travel Award (IIT Delhi), Research Excellence Travel Award (IIT Delhi), GMSI-GSDM Fellowship (University of Tokyo, Japan), Mobility Green Tribology scholarship (Marie Skłodowska-Curie Actions (MSCA) co-funded, Europe)
Reviewed 100+ Journal Articles for 20+ high impact journals.
1. Kumar, D et al. (2024). Low voltage cold and hot switching in nanoswitches cleaned by in situ oxygen plasma can achieve low stable contact resistance. Journal of Applied Physics, 135(2).
2. Kumar, D. (2023). Recent advances in tribology of high entropy alloys: A critical review. Progress in Materials Science, 136, 101106.
3. Kumar, D., et al. (2020). In situ study of role of microstructure on antiwear tribofilm formation on AZ91 magnesium alloy under zinc dialkyldithiophosphate containing lubricant. Advanced Engineering Materials, 22(8), 200033.
4. Kumar, D., et al. (2020). Nanometer-thick base oil tribofilms with acrylamide additive as lubricants for AZ91 Mg alloy. ACS Applied Nano Materials, 3(10), 10551-10559.
5. Kumar, D., et al. (2022). Macroscale to nanoscale tribology of magnesium-based alloys: a review. Tribology Letters, 70(1), 2.
6. Kumar, D., et al. (2021). Influence of temperature on crystallographic orientation induced anisotropy of microscopic wear in an AZ91 Mg alloy. Tribology International, 163, 107159.
7. Kumar, D., et al. (2020). Towards an improved understanding of plasticity, friction and wear mechanisms in precipitate containing AZ91 Mg alloy. Materialia, 10, 100640.
8. Kumar, D., et al. (2021). Reversal of favorable microstructure under plastic ploughing vs. interfacial shear induced wear in aged Co1. 5CrFeNi1. 5Ti0. 5 high-entropy alloy. Wear, 468, 203595.
9. Kumar, D., et al. (2020). Influence of crystallographic orientation on Nanoscale friction and wear mechanisms of the AZ91 alloy. Tribology Letters, 68, 1-10.
10. Kumar, D., et al. (2019). Anisotropy in nanoscale friction and wear of precipitate containing AZ91 magnesium alloy. Tribology Letters, 67, 1-8.
11. Kumar, A., Singh, V. P., Nirala, A., Singh, R. C., Chaudhary, R., Mourad, A. H. I., ... & Kumar, D.* (2023). Influence of tool rotational speed on mechanical and corrosion behaviour of friction stir processed AZ31/Al2O3 nanocomposite. Journal of Magnesium and Alloys, 11(7), 2585-2599. *corresponding author
12. Singh, V. P., Kumar, D.*, Mahesh, V., Harursampath, D., & Kuriachen, B. (2023). Role of interfacial shear strength in nanotribological behaviour of PTA deposited Colmonoy 6 coating on SS304 steel. Materials Letters, 353, 135287. *corresponding author
13. Vashishtha, H.#,and Kumar, D.#, et al. (2023). Effects of hot isostatic processing and hot rolling on direct energy deposited CoCrNi medium entropy alloy–Microstructural heterogeneity, wear behaviour and corrosion characteristics. Materials Characterization, 205, 113304. #Sharing first author
14. Vashishtha, H.#,and Kumar, D.#, et al. (2023). Role of Microstructural Heterogeneity on Nanoscale Mechanical Properties and Wear Responses of Additively Manufactured CoCrNi Medium Entropy Alloy and 316L Stainless Steel. Journal of Materials Engineering and Performance, 1-10. #Sharing first author
15. Kumar, D., et al. (2019). Dry sliding wear behaviour of Ti–6Al–4V pin against SS316L disc in vacuum condition at high temperature. Tribology-Materials, Surfaces & Interfaces, 13(3), 182-189.
16. Kumar, D., et al. (2023). A Novel Seal Design to Enhance MR Brake Performance. Transactions of the Indian Institute of Metals, 76(9), 2335-2342.
17. Kumar, D., et al. (2018). Enhancing tribological performance of Ti-6Al-4V by sliding process. Tribology-Materials, Surfaces & Interfaces, 12(3), 137-143.
18. Thasleem, P., and Kumar, D., et al. (2022). Effect of heat treatment and electric discharge alloying on the lubricated tribology of Al–Si alloy fabricated by selective laser melting. Wear, 494, 204244.
19. Rai, H., Thakur, D., Kumar, D., Pitkar, A., Ye, Z., Balakrishnan, V., & Gosvami, N. N. (2022). Spatial variation in nanoscale wear behavior of chemical vapor deposited monolayer WS2. Applied Surface Science, 605, 154783.
20. Philip, J. T., and Kumar, D., et al. (2021). Tribological investigations of wear resistant layers developed through EDA and WEDA techniques on Ti6Al4V surfaces: Part II–High temperature. Wear, 466, 203540.
21. Philip, J. T., and Kumar, D., et al. (2020). Tribological investigations of wear resistant layers developed through EDA and WEDA techniques on Ti6Al4V surfaces: Part I–Ambient temperature. Wear, 458, 203409.
22. Thasleem, P., Kuriachen, B., Kumar, D.,Ahmed, A., & Joy, M. L. (2021). Effect of heat treatment and electric discharge alloying on the tribological performance of selective laser melted AlSi10Mg. Journal of Tribology, 143(5), 051111.
23. Philip, J. T., and Kumar, D., et al. (2020). Experimental investigations on the tribological performance of electric discharge alloyed Ti–6Al–4V at 200–600 C.Journal of Tribology, 142(6), 061702.
24. Lijesh, K. P., and Kumar, D. et al. (2017). Effect of disc hardness on MR brake performance. Engineering Failure Analysis, 74, 228-238.
1. Deepak Kumar., Nooruddin Ansari (2024), “Magnesium alloys for Biomedical applications: Advances and Challenges”, CRC press, Taylor and Francis, USA.
2. Himanshu Vashishtha., Deepak Kumar., Ravindra Taiwade (2024), “Advanced Welding Techniques: Current Trends and Future Perspective”, CRC press, Taylor and Francis, USA.
“Micromechanics Aspects of Engineering Alloys and Microelectromechanical Switches” Massachusetts Institute of Technology (MIT), USA