A5085790703- Microstructure and Mechanical Properties of Steels
- Hydrogen embrittlement and corrosion behaviors in metals
- Microstructure and mechanical properties
- High Temperature Alloys and Creep
- Aluminum Alloy Microstructure Properties
- Metal Alloys Wear and Properties
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Welding Techniques and Residual Stresses
- Plant-based Medicinal Research
- Aluminum Alloys Composites Properties
- Bioactive Natural Diterpenoids Research
- Alkaloids: synthesis and pharmacology
- Advanced Antenna and Metasurface Technologies
- Metallurgical and Alloy Processes
- Molecular spectroscopy and chirality
- Asymmetric Synthesis and Catalysis
- Microwave Engineering and Waveguides
- X-ray Diffraction in Crystallography
- Advanced Materials Characterization Techniques
- Antenna Design and Optimization
- Fusion materials and technologies
- Additive Manufacturing Materials and Processes
- Biological Activity of Diterpenoids and Biflavonoids
- Intermetallics and Advanced Alloy Properties
Indian Institute of Technology Kanpur
2016-2025
Indian Space Research Organisation
2017-2024
Indian Institute of Technology Jodhpur
2022-2024
University of Alberta
2019-2022
Herein, we report the first, 13-step enantioselective total syntheses of rearranged ent-trachylobane diterpenoids wallichanol A, sanguinolane, and B, achieved via a novel intramolecular [2+2] cycloaddition to construct unique pentacyclic framework containing an unprecedented tricyclo[3.3.1.02,7]nonane motif. Other key steps in synthetic route include highly challenging, selective alkene reduction hydrogen atom transfer (HAT), leveraging thermodynamic preference for tertiary carbon-centered...
Herein, we report the first enantioselective total syntheses of three rearranged ent‐trachylobane diterpenoids, (–)‐Wallichanol A (1), B (2) and (–)‐Sanguinolane (3), using a 13, 17 14 step longest‐linear sequences respectively, featuring novel intramolecular [2+2] cycloaddition to construct unique pentacyclic framework containing an unprecedented tricyclo[3.3.1.02,7]nonane motif. Other key steps in synthetic route include highly challenging, selective alkene reduction via hydrogen atom...
Herein, we report the first enantioselective total syntheses of three rearranged ent‐trachylobane diterpenoids, (–)‐Wallichanol A (1), B (2) and (–)‐Sanguinolane (3), using a 13, 17 14 step longest‐linear sequences respectively, featuring novel intramolecular [2+2] cycloaddition to construct unique pentacyclic framework containing an unprecedented tricyclo[3.3.1.02,7]nonane motif. Other key steps in synthetic route include highly challenging, selective alkene reduction via hydrogen atom...
The effect of postweld heat treatment (PWHT) on Charpy V-notch impact toughness a highfrequency electric-resistance welded (HF-ERW) grade X70 pipeline steel is investigated. PWHT thermal cycles are simulated using the Gleeble as-welded specimens. Microstructure, along with crystallographic texture and microhardness, characterized in specimens that tested at –5°C (23°F), –30°C (–22°F), –45°C (–49°F). values show wide scatter band decrease increasing peak temperature PWHT. For higher...
This letter is concerned with the design and analysis of a dual-polarized center-fed-shaped reflector antenna presently implemented for satellite communication. Design challenges such an have been outlined herein. A novel hybrid surface shaping technique devised that employs both global local profile variables using blend Zernike polynomials (for globalized shaping) spline functions localized shaping). TICRA POS software, physical optics (PO)-based optimizer, employed synthesis. approach...
The first asymmetric total synthesis of (+)-verrubenzospirolactone (
Summary Microstructural evolution of cold‐rolled Cu–5%Zn alloy during in situ heating inside field‐emission scanning electron microscope was utilized to obtain user‐independent parameters order trace the progress static recovery and recrystallization. Electron back‐scattered diffraction (EBSD)‐based orientation imaging microscopy used micrographs at various stages heating. It is shown that unlike pre‐existing methods, additional EBSD‐based parameter can be recrystallization, which not...
Brandon's criterion is frequently used to quantify distribution of coincident site lattice (CSL) boundaries in studies related grain boundary character distribution. This based on theoretical considerations and meant define a range within which special may exist. Experiments have repeatedly shown that this includes do not show properties. A broad aim study explore if there exists cut-off deviation only with While most other criteria literature are dependence secondary dislocation spacing,...
After long-term service, boat samples of 1Cr-1/2Mo steel seemed to have aged, evidenced by the spheroidisation carbides in pearlite region, and a dispersion fine M 23 C 6 precipitation ferrite matrix. The yield strength cracked was two three times reported values new A387 Grade 12 Class 2 material. ductility is less than 0.5 grade. intergranular fracture mode likely due carbide inside grains that strengthened metal matrix, coarse CrMo-rich weaken precipitate/grain boundary interfaces....
Surface mining causes significant wear damage that affects equipment performance, reliability, and lead to associated downtime costs. To improve the resistance of components used in natural resources industries, cemented carbide tiles are joined engaging surfaces components. Joining structural steel can be achieved by various processes, among which brazing is commonly owing its relatively simple processing low cost. A challenge steels poor joint strength. This article aims review recent...