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Full-Text Articles in Mechanical Engineering
Investigation Of The High-Cycle Fatigue Life Of Selective Laser Melted And Hot Isostatically Pressed Ti-6al-4v, Kevin D. Rekedal
Investigation Of The High-Cycle Fatigue Life Of Selective Laser Melted And Hot Isostatically Pressed Ti-6al-4v, Kevin D. Rekedal
Theses and Dissertations
Experimental research was conducted on the effectiveness of Hot Isostatic Pressing (HIP) to improve the high-cycle fatigue life of Selective Laser Melted Ti-6Al-4v (SLM Ti-64). A thorough understanding of the fatigue life performance for additively manufactured parts is necessary before such parts are utilized in an operational capacity in Department of Defense (DoD) systems. Such applications include the rapid, on-demand fabrication of replacement parts during contingency operations or the production of light-weight topology-optimized components. This research assesses the fatigue life of SLM Ti-64 test specimens built directly to net dimensions without any subsequent surface machining. The configuration is designed as …
Experimental Magnetohydrodynamic Energy Extraction From A Pulsed Detonation, Kaz I. Teope
Experimental Magnetohydrodynamic Energy Extraction From A Pulsed Detonation, Kaz I. Teope
Theses and Dissertations
The high MWatt power available in a fuel-fed detonation wave, which contains combustion ions in the trailing gas, provides an opportunity for external power extraction via electromagnetically forced charged particle drift. Sets of experiments were accomplished using a pulsed detonation tube, extracting power across a load resistor in an electrical circuit with an applied electric or magnetic field to determine what magnitude of gas conductivity and power extraction could be attained from an unseeded or seeded pulsed detonation driven combustion. Due to the low magnetic field strength, even with flow seeding, the power extracted in this research was not enough …