Theses and Dissertations
Computer simulation of random and non-random second-phase distributions in two-phase materials
(Monterey, California: Naval Postgraduate School, 1990-12)
The mechanical properties of any material with a discontinuous second phase dispersed in a matrix are recognized to be influenced by the distribution of the second-phase particles. Current models for the prediction of ...
The influence of temperature and composition on the activation energy for creep in binary aluminum lithium alloys
(Monterey, California: Naval Postgraduate School, 1990-12)
With the fast pace of technology in the aerospace industry, there are increasing demands for higher strength and stiffness in structural materials but with reduced weight and improved formability. Aluminum alloys have been ...
Finite element modeling and simulation of thermomechanical processing of particle reinforced metal matrix composites
(Monterey, California. Naval Postgraduate School, 1997-03)
During the consolidation phase, reinforcement particles of Metal Matrix Composites (MMC's) tend to be non uniformly distributed. The result is that the material properties of the composite materials are not as good as those ...
Correlation of processing, microstructure, and superplasticity in an Al-MG-ZR alloy
(Monterey, California. Naval Postgraduate School, 1992-03)
Investigation of the influence of the strain history during thermomechanical processing of an Al-10Mg-0.1Zr was conducted. Refined, recrystallized microstructures resulted when larger strains were employed in the later ...
Study of grain refinement in Al alloy 2519 using backscatter orientation-contrast mode in the scanning electron microscope
(Monterey, California. Naval Postgraduate School, 1992-12)
The effects of variations in thermomechanical processing (TMP) parameters on grain refinement in 2519 Al-Cu alloy were studies. Refined grains enhance tensile ductility and are a prerequisite for superplastic response. ...
The effect of thermomechanical processing on mechanical properties of a cast 6061 aluminum metal matrix composite
(Monterey, California. Naval Postgraduate School, 1993-12)
Thermomechanical processing was conducted on cast 6061 Al-A12O3 metal matrix composites (MMCs) containing either 10 or 20 volume percent of alumina (A1203) particles. These materials were provided by DURALCAN-USA, Inc., ...
The role of particle cracking in dilatation during tensile straining of a cast and thermomechanically processed 6061 Al - 20 volume percent Al2O3 metal matrix composite
(Monterey, California. Naval Postgraduate School, 1996-09)
In this work, the dilatation during tensile straining of a cast and thermomechanically processed 6061 Al - Al2O3 metal matrix composite (MMC) containing 20 volume percent of Al2O3 particles was examined. Standard tensile ...
Evaluation of microstructure of a 6092 Al - 17.5 volume percent SiC particle reinforced composite using Electron Backscatter Pattern (EBSP) analysis methods
(Monterey, California. Naval Postgraduate School, 1998-03)
Microtexture and grain boundary misorientation data were obtained for a 6092 Al-17.5 volume percent SiC particle reinforced material as a function of processing history. Computer aided electron backscatter pattern (EBSP) ...
An analysis of the microstructure and reinforcement distribution of an extruded particle-reinforced Al 6061-10 volume percent A1O3 metal matrix composite
(Monterey, California. Naval Postgraduate School, 1993-09)
This research was performed in conjunction with funding by DURALCAN- USA through a Cooperative Research and Development Agreement (CRDA). The program seeks to improve the ductility of cast and extruded Al 6061-Al203 metal ...
An electron backscatter diffraction analysis of the microstructure of pure aluminum processed by equal-channel angular pressing
(Monterey, California. Naval Postgraduate School, 1998-12-01)
Equal-channel angular (ECA) pressing is a promising method to achieve refinement of grain size to 1.0 micrometer or less for aluminum and its alloys. Computer-aided electron backscatter diffraction (EBSD) analysis of high ...
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McNelley, Terry R. (20)
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Mechanical Engineering (20)