Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Additive Manufacturing (2)
- AF9628 Steel (1)
- Aerospace Industry (1)
- Ceramic Matrix Composites (1)
- Composite Materials (1)
-
- Compressor Blades (1)
- Crack Propagation (1)
- Creep Tests (1)
- Failure Mode and Effect Analysis (1)
- Fatigue Cracking (1)
- Heat Treatment (1)
- Heavy Metal Removal (1)
- Jet Engines (1)
- Laser Powder Bed Fusion (LPBF) (1)
- Materials Processing (1)
- Metals (1)
- Modulus of Elasticity (1)
- Notch Sensitivity (1)
- Photodegradation (1)
- Photothermal Energy Conversion (1)
- Physical Properties (1)
- Selective Laser Melting (1)
- Semiconductor Photocatalysis (1)
- Solar Desalination (1)
- Solar Steam Generation (1)
- Tensile Properties (1)
- Turbine Components (1)
- Water Treatment (1)
- Xray Computed Tomography (1)
Articles 1 - 4 of 4
Full-Text Articles in Physical Sciences and Mathematics
Creep Of Nextel 720/Alumina Ceramic Matrix Composite With Diamond-Drilled Effusion Holes At 1200°C In Air And In Steam, Megan L. Harkins
Creep Of Nextel 720/Alumina Ceramic Matrix Composite With Diamond-Drilled Effusion Holes At 1200°C In Air And In Steam, Megan L. Harkins
Theses and Dissertations
A recent study evaluated tensile stress-strain and tensile creep behavior of an oxide-oxide composite (Nextel™720/alumina) with laser-drilled effusion holes at 1200°C. It was determined that the presence of laser-drilled holes degraded the mechanical properties and performance of the CMC as a result of damage caused to the composite microstructure by the laser drilling process. Based on these results, the present effort sought to assess the effects of diamond-drilled holes on the mechanical behavior of this CMC. Tensile properties of the N720/A composite at 1200°C in laboratory air were unaffected by the presence of an array of 17 diamond-drilled effusion holes. …
Fracture Toughness And Fatigue Crack Growth Rate Characterization Of Inconel 718 Formed By Laser Powder Bed Fusion, Charles C. Hohnbaum
Fracture Toughness And Fatigue Crack Growth Rate Characterization Of Inconel 718 Formed By Laser Powder Bed Fusion, Charles C. Hohnbaum
Theses and Dissertations
Continuing improvement in the field of AM of metals provides the opportunity for direct fabrication of aerospace parts. AM was once used in large part for rapid prototyping but improvements in technology and increases in the knowledge base of AM materials has provided the opportunity for manufacture of AM parts for operational use. The ability to create low numbers of unique parts without having to invest in expensive tooling provides great economic incentive to utilize this technique. IN718 is the most common high temperature alloy used in the aerospace industry and lends itself readily to formation by LPBF. The superior …
Process Parameter Development Of Additively Manufactured Af9628 Weapons Steel, Erin M. Hager
Process Parameter Development Of Additively Manufactured Af9628 Weapons Steel, Erin M. Hager
Theses and Dissertations
The manufacture of components in Additive Manufacturing processes is limited by the range of materials available. Qualification of materials for Additive Manufacturing is time intensive, and is often specific to a single type of machine. In this study, an approach to selecting power, speed, and hatch spacing values for a newly powderized material, AF9628 weapons steel, is described that results in highly dense (>99.9%) parts on an MLab 200R Cusing. Initial power and speed values used in a weld track study were selected based on a survey of parameters used on similar materials, with a focus on the energy …
Nanostructured Materials For Photocatalysis, Water Treatment And Solar Desalination, Hiran D. Kiriarachchi
Nanostructured Materials For Photocatalysis, Water Treatment And Solar Desalination, Hiran D. Kiriarachchi
Theses and Dissertations
Maintaining a constant supply of clean drinking water is among the most pressing global challenges in our time. About one-third of the population is affected by the water scarcity and it can only get worse with climate change, rapid industrialization, and the population growth. Even though nearly 70 percent of the planet is covered by water, the consumable freshwater content is only 2.5 percent of it. Unfortunately, the accessible portion of it is only 1 percent. Even so, most of the freshwater bodies are choked with pollution. Considering the vast availability of saline water on the planet and the increasing …