Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"metallic alloys"”.
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High throughput prototyping and multiscale indentation characterization of metallic alloys
… The composite material is a Ti-based bulk metallic glass matrix composites (BMG-MCs) in which dendrites of a crystalline phase exist in a matrix of amorphous phase. We have selected these alloys in this dissertation because of their importance to several advanced technologies, owing to …
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Selective thermal transformation of e-waste to novel metallic alloys
… waste (e-waste) to produce value-added metallic alloys. This research demonstrated a novel pathway for the cost-effective recovery of resources from one of the world’s fastest growing and most challenging waste streams. Using outdated PCBs from different source such as computer, printer …
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First -Principles Prediction of Thermodynamics and Ordering in Metallic Alloys
… structure and composition in Al-rich Al-Ag alloys and explain the experimental TEM data.
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Thermophysical and Structural Measurements of Liquid Metallic Alloys Using Electrostatic Levitation
… form glasses more easily than others. In metallic alloys such measurements are difficult due to the high reactivity and high melting temperatures of these liquids. Levitation methods provide a solution this problem by isolating liquid alloys from their environments. Here, the techniques of …
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Multi-scale numerical modelling of phase transition phenomena in metallic alloys
… of the solidification process involving the metallic alloys is proposed. The purpose of this model is to increase our basic knowledge of the physics of the solidification by incorporating atomic aspects of the phase change and, therefore, to predict the rnicrostructural features of the phase …
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Modeling of Effect of Alloying Elements on Radiation Damage in Metallic Alloys
Metallic alloys are important structural and cladding materials for current and future reactors. Understanding radiation-induced damage on metallic alloys is important for maintaining the safety of nuclear reactors. This dissertation mainly focuses on radiation-induced primary damage in iron-based …
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Fabrication and corrosion assessment of biodegradable metallic alloys for patient-specific bone implant applications
Biodegradable metals and alloys are materials that are intended to remain in the body long enough for healing to occur, and then degrade or dissolve after their service lifetime. Permanent implants are often much stiffer than the bone they are supporting, which can lead to loss of bone density, …
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The effect of pressure on the resistivity and Hall coefficient of amorphous metallic alloys
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-13T14:15:22Z No. of bitstreams: 1 1983_mcneil.pdf: 2009043 bytes, checksum: 17a78b5f271dbede167bc04309ec74b8 (MD5)
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X-ray imaging by partially coherent synchrotron light: Application to metallic alloys, tooth dentin and natural rock
Das harte Spektrum der BAMline am Berliner Synchrotron BESSY bietet die seltene Möglichkeit, Experimente mit hochauflösender Röntgenbildgebung und teil-kohärenter Strahlung zu machen. Diese Promotionsarbeit umfasst die Entwicklung eines neuen Tomographieaufbaus und dessen Anwendung auf drei …
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Atomistic Insights into Alloy Solidification using Machine-Learning Potentials
… (MLPs) that capture the chemical complexity of metallic alloys, providing a physically accurate and computationally efficient backbone for large-scale atomistic simulations of complex alloy solidification. We first address a foundational challenge in deploying MLPs: the systematic construction …
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Strain Localization in Tungsten Heavy Alloys and Glassy Polymers
… high strain rate deformations of metals and metallic alloys, narrow regions of intense plastic deformations have been observed experimentally. The phenomenon is termed strain localization and is usually a precursor to catastrophic failure of a structure. Similar phenomenon has been observed …
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Solid State Synthesis of Bulk Amorphous Ni – 50AT% Ti Alloy
… traditional methods of casting multi-component metallic alloys. Samples milled cryogenically for 10 hours provided a homogeneous lamella structure with spacing of 30-110 nm. X-ray diffraction and transmission electron microscopy studies indicated that there were alloying and amorphous phase …
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Constitutive Behavior of Bulk Metallic Glass Composites at Ambient and High Temperatures
When certain molten metallic alloys are rapidly quenched, they solidify to yield a disordered microstructure, called a metallic glass. Metallic glasses are generally brittle at room temperatures and fail catastrophically via one dominant or multiple shear bands. These limitations can be overcome by …
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High Temperature X-Ray Decomposition Studies of Alpha Phase Nickel-Silicon and Beta Phase Copper-Aluminum-Nickel Alloys
… decomposition and precipitation processes of two metallic alloys of commercial significance: Ni-12.5 at% Si and Cu-28.15 at% Al-3.88 at% Ni. Earlier resistivity measurements of the Ni-Si superalloy of the same composition yielded what was thought to be an apparent order-disorder instability …
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Selective Laser Melting of Finemet Soft Magnetic Material
… materials originate from optimizing amorphous metallic alloys, resulting in low coercivity and high saturation magnetization by facilitating the formation of nanocrystals. An extremely high cooling rate is the foundational factor for controlling the microstructure. Selective Laser Melting (SLM) …
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Polymer blends formed by the solid state mechanical alloying process
… 1970's a new processing technique to produce metallic alloys was developed by Benjamin and co-workers. This novel technique, called Mechanical Alloying (MA), involves the repeated welding, working hardening, and fracture of metallic powders to form an alloy. The research presented in this …
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Exploring poly (2, 5) benzimidazole enhanced with carbon nanotubes for space applications
… ionising radiation. However, compared to metallic alloys, these materials suer from relatively low mechanical and thermal properties, which limit their application. Aluminium (Al) enjoyed wide use in space applications as a structural and radiation shielding material. However, weight and …
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Superelastic shape memory alloy composite bars for reinforcing concrete structures
Superelastic shape memory alloys (SMAs) are a class of metallic alloys that have the unique property of being able to undergo large amounts of plastic strain while remaining elastic and dissipating energy. This thesis explored a strategy for adding ductility and energy dissipation to FRP …
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The potential for superlattice precipitate reinforcement in titanium-iron alloys
In the pursuit of novel structural metallic alloys, the concept of alloys featuring ordered B2 precipitates within a BCC matrix offers a promising possibility due to the potential synergistic benefits of a matrix with superlattice precipitates. The titanium-iron system is selected for this purpose, …
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