Theses and Dissertations
Feasibility of underwater friction stir welding of HY-80 steel
(Monterey, California. Naval Postgraduate School, 2011-03)
The purpose of this thesis is to determine the feasibility of underwater friction stir welding (FSW) of high-strength; quench and temper low carbon steels that are susceptible to hydrogen-assisted cracking (HAC). The ...
Design and analysis of a solar-powered compressed air energy storage system
(Monterey, California: Naval Postgraduate School, 2016-12)
This thesis is a two-party study that analyzed a compressed air storage system using fundamental thermodynamic principles and designed the compression phase using commercial-off-the-shelf components. The analysis for this ...
Renewable production of water, hydrogen, and power from ambient moisture
(Monterey, California: Naval Postgraduate School, 2016-12)
This thesis developed a concept design and prototype system capable of increasing and improving the main energy constraints the Department of Defense must overcome to meet future mission requirements, energy availability ...
Small-scale air-driven generator
(Monterey, California: Naval Postgraduate School, 2016-12)
The purpose of this thesis was to demonstrate the concept of generating electrical energy using only compressed air as a working fluid. Compressed air systems are common on naval installations, posing an enticing opportunity ...
Vision-based position estimation utilizing an extended Kalman filter
(Monterey, California: Naval Postgraduate School, 2016-12)
The purpose of this project is to develop and integrate a prototype multicopter Unmanned Aerial Vehicle (UAV) with a vision-based algorithm to enable a relative position hold capability. The resulting solution will enable ...
Laser peening for mitigation of stress corrosion cracking at welds in marine aluminum
(Monterey, California. Naval Postgraduate School, 2011-06)
This work examines the use of laser peening (LP) for mitigation of stress corrosion cracking (SCC) in marine grade aluminum alloys (Al-Mg). These alloys can be sensitized during welding and will develop a tensile residual ...
Diffusion Couple Alloying of Refractory Metals in Austenitic and Ferritic/Martensitic Steels
(Monterey, California. Naval Postgraduate School, 2012-03)
This thesis utilized the diffusion couple approach to evaluate the addition of molybdenum, niobium, tantalum, and tungsten to 316 stainless (316SS) and alloy HT9 steels. Refractory elements have been previously studied as ...
Evaluation of Friction Stir Processing of HY-80 Steel Under Wet and Dry Conditions
(Monterey, California. Naval Postgraduate School, 2012-03)
This thesis describes the microstructural and mechanical property changes associated with Friction Stir Processing
(FSP) of HY-80 steel under dry and underwater conditions. HY-80 is a low-carbon alloy steel that is used ...
Development and Analysis of a Bi-Directional Tidal Turbine
(Monterey, California. Naval Postgraduate School, 2012-03)
The concept of using renewable energy for power generation has experienced much attention with increasing costs of non-renewable sources. The largest untapped renewable energy resource is in the form of the oceans and ...
Carbon Fiber and Tungsten Disulfide Nanoscale Architectures for Armor Applications
(Monterey, California. Naval Postgraduate School, 2012-06)
The objective of this research was to generate shock-resistant materials based on inorganic fullerene type tungsten disulfide (IF-WS2) and carbon nanocomposite structures for personal protection armor systems. The aim was ...
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