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Effects of processing on the properties of aluminum-cerium-based alloys
(2020-12-09)
This research seeks to characterize Al-Ce-based alloys processed via different routes. These production methods include powder-in-tube, gravity casting, and powder extrusion. Al-Ce alloys samples were made by gravity casting ...
Effects of Mg and Si additions to novel Al-Ce based alloys for aerospace applications
(2020-07-24)
The experimental work in this thesis is focused on the alloying effects of Mg and Si in Al-Ce base alloys. The alloys were gravity cast over a 20-point (or target chemical compositions) test matrix. X-ray diffraction, ...
Fabrication, characterization and testing of functionally graded aluminum-based targets for sputtering deposition of hybrid composites
(2011)
The fabrication, characterization and testing of sputtering targets were completed for the deposition of hybrid composites. The chemical composition of the target specimens consisted of an aluminum-silicon matrix reinforced ...
Characterization of an optimized hig performance concrete with partial replacement of cement by fly ash and nanosilica
(2018)
Modern construction industry requires new technologies to comply with increasingly stricter environmental regulations. In particular, cutting back cement demand in concrete fabrication lowers carbon dioxide emissions caused ...
Effect of cyclic high loading rates on the fatigue strength of aluminum-based composites
(2009)
The study of fatigue under high loading rates is of great interest in the complete characterization of a new series of composites with Al-Cu-Mg matrix reinforced with AlB2 dispersoids. Homogeneous and functionally graded ...
Optimization of novel aluminum welding fillers reinforced with NbB2 nanoparticles
(2018-05)
Accordingly, the present research sought a cost-effective alternative to repair structures and rescue equipment with better quality welding, for rapid restoration of areas affected by disasters. This study focuses on the ...
Thermomechanometric study of AI-Cu-B composites reinforced with diboride particles
(2011)
Al-Cu composites reinforced with diboride particles were fabricated by gravity casting. A thermomechanical analysis (TMA) system allowed studying hardness and creep behavior of the composites. The composite hardness was ...
Tortuosity index based on dynamic mechanical properties of polyimide foam for aerospace application
(2014)
The aerospace industry has focused on the development of high performance polyimide foams because these materials are known for their thermal and acoustic insulation properties. Tortuosity is defined as a parameter that ...
Fabrication and characterization of porous aluminum and zinc via selective dissolution of AI-Zn alloys
(2013)
Chemical dealloying can be used to fabricate porous metals by removing one or more of the species out of an alloy. Generally, a corrosive electrolyte is used to selectively dissolve a noble element. Alloy concentration, ...
AFM studies on fractured surfaces of AF1410 steel and A7075-T6 aluminum alloy
(2006)
In the present research, atomic force microscopy (AFM) was used to characterize fracture surfaces of the AF1410, ultra-high strength steel, and a high strength AA7075-T6 aluminum alloy. Both materials are used by the U.S. ...