A5034936855- Aluminum Alloy Microstructure Properties
- Corrosion Behavior and Inhibition
- Particle Dynamics in Fluid Flows
- Hydrogen embrittlement and corrosion behaviors in metals
- Non-Destructive Testing Techniques
- Cyclone Separators and Fluid Dynamics
- Advanced Welding Techniques Analysis
- Aluminum Alloys Composites Properties
- Aerosol Filtration and Electrostatic Precipitation
- Nuclear Materials and Properties
- High-Temperature Coating Behaviors
- Fatigue and fracture mechanics
- Gas Dynamics and Kinetic Theory
- Welding Techniques and Residual Stresses
- Nuclear Physics and Applications
- Catalytic Processes in Materials Science
- Fusion materials and technologies
- Topic Modeling
- Microstructure and Mechanical Properties of Steels
- Nuclear reactor physics and engineering
- Combustion and flame dynamics
- Advanced Combustion Engine Technologies
- High Temperature Alloys and Creep
- nanoparticles nucleation surface interactions
- Metal and Thin Film Mechanics
Southwest Research Institute
2021-2025
University of Manchester
2017-2024
Henry Royce Institute
2022-2024
University of Virginia
2000-2022
Poughkeepsie Public Library District
2019-2020
Diamond Light Source
2019
University of Birmingham
2007-2018
Applied Sciences (United States)
2016
National Physical Laboratory
2008
United States Naval Research Laboratory
2004
AA5182 (Al-4.5 wt% Mg) can become susceptible to intergranular corrosion (IGC) with time at moderately elevated service temperatures owing precipitation of Mg-rich β-phase grain boundaries, which lead stress cracking (SCC). The IGC and SCC susceptibility was found depend strongly on sensitisation heat treatments. AFM TEM studies demonstrated that the degree thus attack for a boundary be related its crystallographic misorientation. Low angle boundaries (<20°) are most resistant as they do...
Providing materials with smart functionalities such as self-healing properties is primarily a domain for organic materials, although their applicability restricted to mild environments and loads because of poor thermal mechanical properties. This work seeks achieve the active obtained in but ceramics, which are much more heat resistant robust. Ceramic coatings were produced by plasma electrolytic oxidation (PEO), an environmentally friendly technique that offers alternative potentially...
Synchrotron X-ray microtomography has been used to study the distribution of Y in aerospace magnesium alloy WE43 and its role morphology corrosion attack. A three-dimensional map was obtained by acquiring tomographic images above below K-edge at . Tomographic from a heavily corroded as-cast sample showed that Y-rich regions matrix slow propagation corrosion. In situ time-dependent heat-treated show homogenization decreases rate, but both general attack pitting is still observed.
Although clean energy generation utilizing the Oxygen Reduction Reaction (ORR) can be considered a promising strategy, this approach remains challenging by dependence on high loadings of noble metals, mainly Platinum (Pt). Therefore, efforts have been directed to develop new and efficient electrocatalysts that could decrease Pt content (e.g., nanotechnology tools or alloying) replace them completely in these systems. The present investigation shows catalytic activity reached towards ORR...
Oxidation of Super 304H and shot-peened austenitic stainless steel was conducted over a temperature range 600 – 700°C in steam at atmospheric pressure compared with oxidation laboratory air. It observed that the mass gain higher should be noted shot-peening treatment improved resistance both air considerably. Furthermore, spallation only on pickled specimens after exposures 650°C 700°C. The protective films found base duplex oxide grown were to differ exposure air, chromium rich film present...
The susceptibility of aluminum alloy 7075 (AA7075 [UNS A97075]) to intergranular stress corrosion cracking (SCC) in the peak strength T6 temper is alleviated through use T73, or over-aged temper, which provides improved SCC resistance with a 10% 15% loss compared temper. Previous research has indicated that retrogression and re-aging (RRA) heat treatments reduce trade-off between T73 resistance. short-term treatment they used, however, limited applicability RRA thin sections material....
Navy radar operations are being curtailed in a littoral environment. This is due to two factors: the encroachment of cell phone systems into naval bands; in-band interference from other radars. The spectral width most pulsed radars significantly wider than necessary with present modulation schemes. Most utilize some form constant envelope pulse phase or frequency modulation. causes spectrum broaden several times information bandwidth. If both amplitude and transmitted signal allowed change,...
Hypersonic vehicles operate at extreme environments narrow margins of safety. High-speed flight in the atmosphere when volcanic ash and other meteorological particles are present can cause damage to these vehicle surfaces, impairing heat transfer damaging sensitive components, leading failure. Upon surveying typical conditions for solid that might be encountered, it was determined A2 test dust is a reasonable representation terms particle density, shape, size distribution. A set...
Abstract Direct-fired oxy-fuel supercritical carbon dioxide (sCO2) combustors present a novel approach for near-total capture. However, maintaining stable flame under extreme pressure and temperatures, characteristic of these combustors, poses significant challenges. Re-ignition failure could necessitate depressurization to atmospheric levels, leading substantial time energy losses. This study experimentally investigates laser ignition stabilization in simplified oxygen/methane-fired,...
This study examines the potential of Large Language Models (LLMs) in augmenting satellite ground testing tasks. The focus is on a Coarse Attitude Sensor (CAS), component system responsible for attitude determination. capabilities LLMs are evaluated across three primary tasks: refining requirements, generating code documentation, and assisting test engineering LLM employed this study, GPT-4-32k-0613, demonstrated promising results initial stages requirements analysis documentation. However,...
This paper summarizes findings from the 6th AIAA Propulsion Aerodynamics Workshop (PAW) nozzle test case. The focus of workshop was turbulent supersonic round jets with variation in jet Mach number and heating. Three nozzles were examined having on-design numbers 1.36, 1.63, 2.00. Five cases examined: A heated for each these three at conditions, a temperature matched condition an off-design 1.63 nozzle. Computational fluid dynamics (CFD) solutions compared non-intrusive measurements plume...
This paper explores the potential of Large Language Models (LLMs) in air traffic control (ATC) operations, specifically for anomaly detection ATC communications. A series tests were conducted using OpenAI's GPT-4 model, involving various scenarios ranging from routine operations to high-stakes emergencies and unique cases. The results demonstrate model's competent understanding aviation terminology procedures its ability detect interpret anomalies. However, limitations observed subtle...