Theses and Dissertations
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 ...
The Effect of Sensitization on the Stress Corrosion Cracking of Aluminum Alloy 5456
(Monterey, California. Naval Postgraduate School, 2012-06)
This work examines the effect of sensitization on the stress corrosion cracking behavior of marine grade aluminum alloys (Al-Mg). These alloys can be sensitized during operation, promoting their susceptibility to intergranular ...
Using x-ray diffraction to assess residual stresses in laser peened and welded aluminum
(Monterey, California. Naval Postgraduate School, 2011-12)
This thesis examines the interplay of residual stress distributions caused by welding and laser peening of marine aluminum alloy 5083. Residual stresses at welds in this alloy can cause fatigue and stress corrosion cracking ...
Processing-microstructure-property relationships for cold spray powder deposition of Al-Cu alloys
(Monterey, California: Naval Postgraduate School, 2015-06)
This thesis presents research on the cold gas-dynamic spray process applied to the deposition of aluminum-copper alloy coatings. Cold spray deposition is a process utilized to create corrosion protection coatings and to ...
Systematic review of UIT parameters on residual stresses of sensitized AA5456 and field based residual stress measurements for predicting and mitigating stress corrosion cracking
(Monterey, California: Naval Postgraduate School, 2014-03)
This thesis focuses on the use of x-ray diffraction to measure residual stresses around welds in aluminum ship structures both in the laboratory and in the field. Tensile residual stresses are often generated during welding ...
Applying massively parallel kinetic Monte Carlo methods to simulate grain growth and sintering in powdered metals
(Monterey, California. Naval Postgraduate School, 2011-09)
50 nm) can be used to bond materials at dramatically lower temperatures and pressures while maintaining the mechanical properties of nanostructured materials. Despite these promising results, the grain growth and sintering ...
THE ROLE OF STRESS IN THE CORROSION CRACKING OF ALUMINUM ALLOYS
(Monterey, California. Naval Postgraduate School, 2013-03)
This work examines the effect of stress on the rate of sensitization, the rate of pitting corrosion and the rate of crack nucleation of aluminum alloy 5083-H116 aluminum. Stress corrosion cracking in aluminum superstructures ...
The effects of applied stress and sensitization on the passive film stability of AL-MG alloys
(Monterey, California: Naval Postgraduate School, 2013-06)
This thesis evaluates effects of stress on the corrosion behavior for the aluminum magnesium alloy AA5083 in a comprehensive and systematic manner. This study used cyclic polarization and electrochemical impedance spectroscopy ...
Characterization of residual stress as a function of friction stir welding parameters in ODS steel MA956
(Monterey, California: Naval Postgraduate School, 2013-06)
This thesis characterizes the residual stresses generated by friction stir welding of ODS steel MA956 as a function of heat index. The heat index of a weld is used to determine relative heat input among different friction ...
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Brewer, Luke N. (17)
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Mechanical Engineering (17)