A5000040934- Adhesion, Friction, and Surface Interactions
- Advanced Welding Techniques Analysis
- Surface Modification and Superhydrophobicity
- Aluminum Alloys Composites Properties
- Laser Material Processing Techniques
- Aluminum Alloy Microstructure Properties
- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Fluid Dynamics and Heat Transfer
- Welding Techniques and Residual Stresses
- Advanced machining processes and optimization
- Additive Manufacturing and 3D Printing Technologies
- Surface Roughness and Optical Measurements
- Advanced Surface Polishing Techniques
- Tribology and Lubrication Engineering
- Mechanical Behavior of Composites
- Advanced Machining and Optimization Techniques
- Advanced Combustion Engine Technologies
- Microstructure and mechanical properties
- Icing and De-icing Technologies
- Magnesium Alloys: Properties and Applications
- Lubricants and Their Additives
- Heat transfer and supercritical fluids
- Ultrasonics and Acoustic Wave Propagation
- Surface Treatment and Residual Stress
Pacific Northwest National Laboratory
2021-2024
University of South Florida
2024
University of Iowa
2016-2021
Iowa City Public Library
2021
Budge Budge Institute of Technology
2016
Indian Institute of Technology Bombay
2013-2015
Jadavpur University
1983
Wetting behaviors of structured metal surfaces have received considerable attention due to the wide range applications for commercial, industrial, and military uses as well fundamental research interests. Due its adaptability, precision, ease automation, laser-based texturing techniques are desirable platforms create micro- nano-structures, including laser-induced periodic surface structures, or hierarchical structures on a substrate. However, nanostructures alone often do not achieve...
Extreme wetting activities of laser-textured metal alloys have received significant interest due to their superior performance in a wide range commercial applications and fundamental research studies. Fundamentally, extreme wettability structured depends on both the surface structure chemistry. However, compared with generation physical topology surface, role chemistry is less explored for laser texturing processes tune wettability. This work introduces systematic design approach modify...
Superhydrophobic metal alloy surfaces are increasingly employed in aerospace and naval applications for anti-icing, drag reduction, self-cleaning, high-efficiency light absorption capabilities. Emerging laser-based surface texturing methods demonstrate significant potential manufacturing these surfaces, with the advantages of high processing precision flexibility. In this research, superhydrophobicity is achieved on engineering using a novel nanosecond Laser-based High-throughput Surface...
Enabling capillary wicking on bulk metal alloys is challenging due to processing complexity at different size scales. This work presents a laser-chemical surface treatment fabricate superwicking patterns guided by superhydrophobic region over large-area alloy surface. The generates micro/nanostructures and desirable chemistry simultaneously. was first fabricated the whole laser under water confinement fluorosilane treatment; subsequently, stripes were processed second in air cyanosilane...
Friction stir extrusion (FSE) offers a solid-phase synthesis method consolidating discrete metal chips or powders into bulk material form. In this study, an FSE machine tool with central hole is driven at high rotational speed the contained in chamber, mechanically stirs and consolidates work material. The softened consolidated extruded through center of tool, during which microstructure undergoes significant transformation due to intensive thermomechanical loadings. Discontinuous dynamic...
In this work, a Cellular Automaton (CA) model is for the first time developed to predict material microstructure evolution during cutting processes. Prior CA simulation, dynamic thermomechanical loadings of work material, Aluminum Alloy 1100, induced by various orthogonal conditions are simulated finite element-based models. Evolution dislocation density modeled using in MATLAB subjected these loading conditions. Multiple mechanisms coupled including severe plastic deformation, recovery,...
Abstract Finite element analysis (FEA) is widely used in predicting machining-induced temperature profiles, forces, stresses, strains; however, its only drawback high computational cost. This paper presents a finite (FE) approach for above mentioned machining induced state variables laser-assisted (LAM) via computationally efficient FE model of orthogonal and oblique LAM AISI D2 tool steel. The commercial software DEFORM 3D® has been this study. simulations the longitudinal cutting have...