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Dr. Chetan Singh is currently working as a postdoctoral research scholar in the Hopkins Extreme Materials Institute, Johns Hopkins University, United States of America. His research is focused on the synthesis and testing of reactive metal powders for agent defeat applications.
Developing reactive metal alloy powders to optimise ignition and combustion properties for agent defeat applications (ongoing)
Developing reactive metal alloy powders to optimise ignition and combustion properties for agent defeat applications (ongoing)
Hopkins Extreme Materials Institute, Johns Hopkins University, United States
Advisor: Prof. Timothy P. Weihs
Synthesis and testing of reactive metal alloy powders with optimized ignition and combustion properties using ultrasonic atomization for biowarfare agent defeat applications..
Investigation of the mechanical behavior of metallic materials under static and dynamic loading at ultra-cryogenic temperature (15K)
Investigation of the mechanical behavior of metallic materials under static and dynamic loading at ultra-cryogenic temperature (15K)
Chungnam National University, Republic of Korea
Advisor: Dr. S. Y. Lee
Currently, as a Postdoctoral Researcher at Chungnam National University, South Korea, I am investigating the impact of hydrogen embrittlement on the fatigue-fracture behavior of metallic materials, including SS316L, medium entropy alloys, and high Mn-steels at ultra-cryogenic temperatures of 15 K. These studies have applications in extremely low-temperature storage and transport of green hydrogen. Here, I proposed a three-step thermomechanical processing method for microstructural modifications to enhance the toughness of steels exhibiting transformation-induced plasticity. My beam time proposal was selected at Oak Ridge National Laboratory, US, to investigate the progressive impact of the developed three-step thermomechanical process, integrating deep cryogenic treatment and simultaneous pre-straining, to design microstructures in alloys exhibiting transformation-induced plasticity. I utilize advanced microstructural characterization techniques, including Neutron diffraction, XRD, Electron Channelling Contrast Imaging, and correlative Orientation Imaging Microscopy to investigate various deformation modes and defect formation resulting from dynamic loading at ultra-cryogenic temperatures.
Elucidating the influence of heterogeneous microstructures engineered via pre-straining during deep cryogenic treatment at 15K
Elucidating the influence of heterogeneous microstructures engineered via pre-straining during deep cryogenic treatment at 15K
Oak Ridge National Laboratory, United States
Advisor: Dr. S. Y. Lee
Investigating the progressive impact of a three-step thermomechanical process, integrating deep cryogenic treatment and simultaneous pre-straining, to design microstructures to mitigate the strength-ductility tradeoff in alloys exhibiting transformation-induced plasticity. In this project, we will be using in-situ neutron diffraction and correlative orientation imaging microscopy to study the different deformation modes activated as an influence of thermomechanical processing. We proposed in-situ neutron diffraction experiments to elucidate the low-cycle fatigue (LCF) behavior of SS316L processed under three-step thermomechanical processing involving DCT. This approach seeks to yield desired microstructures to achieve enhanced mechanical properties.
Exploring the correlation between precipitation behavior and lattice strain evolution in AA6061 alloy
Exploring the correlation between precipitation behavior and lattice strain evolution in AA6061 alloy
Oak Ridge National Laboratory, United States
Advisor: Dr. S. Y. Lee
Investigating the microstructural evolution and microscopic creep/stress relaxation behavior on the precipitation behavior during aging conditions in order to accurately interpret their complex relationship with the observed mechanical properties. In this project, we will be using in-situ neutron diffraction and correlative orientation imaging microscopy to study the correlation between precipitation behavior and lattice strain evolution.
Develop a superior and sustainable method of plating rose gold to ensure better plating strength and life (Patent applied: 202411013979 )
Develop a superior and sustainable method of plating rose gold to ensure better plating strength and life (Patent applied: 202411013979 )
Indian Institute of Technology Delhi, India
Advisor: Dr. J. Jain, Dr. A. Bhowmik, and Dr. N.N. Goswami
Collaborators: GIVA jewelry, India
Aim
Analysis of activated, pristine, and tarnished samples to elucidate the optimized plating technique and parameters to increase the life of the rose gold plated jewelry
Development of novel Mg-Ca-Sc alloys as potential biodegradable implant material
Development of novel Mg-Ca-Sc alloys as potential biodegradable implant material
Indian Institute of Technology Delhi, India
Advisor: Dr. J. Jain
Developed a pseudo-binary Mg-0.6Ca-xSc using ThermoCalc
§ Compared to Mg-Ca binary system, the single-phase region of the pseudo-binary was significantly broadened.
§ Detailed investigation of die-cast novel compositions using optical, SEM, EDS, and EBSD.
Studied the influence of the simultaneous addition of Ca ad Sc on hot deformation behavior
§ Dominant deformation mode, recrystallization behavior, and micro-texture analysis of recrystallized and deformed grains performed using EBSD. Additionally, macro-texture was studied using XRD.
§ Thermomechanical processing parameters optimized for obtaining desired microstructural features.
Studied the electrochemical behavior of developed novel alloys
§ Corrosion rate quantified using immersion tests. Electrochemical behavior was studied using OCP, PDP, and EIS techniques. Mg-0.6Ca-0.5Sc exhibited excellent corrosion resistance.
§ In-situ corrosion behavior was studied using an optical microscope to elucidate the corrosion mechanism.
Studied the mechanical behavior of developed novel alloys
§ Studied the compression and tensile behavior in as-cast and recrystallized conditions in air and corrosion media.
§ In-situ under quasi-static monotonic tensile loading in SEM was carried out to understand the effect of strain rate on deformation behavior. Ex-situ AFM analysis was performed to characterize and quantify grain boundary sliding.
Studied the cytotoxicity and tribological behavior of developed novel alloys
§ Studied the wear and friction behavior under dry and lubrication conditions.
§ Mg-0.6-xSc alloys exhibited enhanced wear resistance and excellent cell viability.
Optimizing microstructures of textured nano-twinned copper for electronic packaging
Optimizing microstructures of textured nano-twinned copper for electronic packaging
Indian Institute of Technology Delhi, India
Advisor: Dr. J. Jain
Collaborators: Research group of Dr. Chih Chen, NCTU Taiwan and Dr. S. Phani, ARCI, India
My contribution
Studied the mechanical response at room temperature and high temperature using Nanoindentation and established the correlation between microstructure and mechanical properties of the redistributed layer of nanotwinned-Cu on wafer-level packaging for electronic applications.
Studied the room temperature creep behavior and established the correlation between microstructure and mechanical properties.
Characterization of the nt-Cu thin films using FESEM and EBSD.
Investigations on the failure of the pressure switch electrical contacts and the development of a new pressure switch for a higher current rating design (patent pending)
Investigations on the failure of the pressure switch electrical contacts and the development of a new pressure switch for a higher current rating design (patent pending)
Indian Institute of Technology Delhi, India
Advisor: Dr. J. Jain, Dr. S. Neelakantan, and Dr. N.N. Goswami
Collaborators: WIKA (Germany-based Industry)
My contribution
Analysis of contact material from failed pressure switch using optical SEM. EDS to identify the probable reasons for failure.
Proposed material and processing modification resulting in increasing the life cycle of the 20A pressure switch from a few ten thousand cycles to above one and a half lakh cycles
Development and characterization of contact materials for pressure switch with integrated starter arrangement with 60 A current rating following international industry guidelines
Nanofluid spray for heat transfer enhancement of high-temperature steel surface and its effect on the microstructure and mechanical properties
Nanofluid spray for heat transfer enhancement of high-temperature steel surface and its effect on the microstructure and mechanical properties
Indian Institute of Technology Roorkee, India
Advisor: Dr. G.P Chaudhary
Studied the effect of Al2O3 nanoparticles concentration on particle size and polydispersity index due to clustering effects to study the stability of the colloidal suspension.
Studied the effect of the nanofluids on the cooling efficiency of steel sheets and resulting surface hardness.
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