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Chapter and Conference Paper
A 3D Multiple-Slip Crystal-Plasticity Model for Precipitate Hardening in Additively Manufactured High Strength Steels
(AM) revolutionized the manufacturing of complex geometry products, especially in medical and aerospace fields. High-strength precipitate hardened (PH) stainless steels provide unique properties in term of st...
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Chapter and Conference Paper
Iron-Ore Reduction Using Green Hydrogen: A Study for Recycling Wastes in Egyptian Steel Industry
A new prospective in using pure hydrogen to reduce waste iron ores in a two-stage fluidized bed reactor is presented, modeled, and analyzed. The main advantage of applying this route to the steel industry ...
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Chapter and Conference Paper
Power to Hydrogen: The Prospects of Green Hydrogen Production Potential in Africa
Africa is rich with an abundance of sources that can help in meeting the continent's demand for electricity to promote economic growth and meet global targets for CO2 reduction. h is considered one of the mo...
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Chapter and Conference Paper
Multi-Physics Modelling of Additively Manufactured Cellular Structures Using Selective Laser Melting
Cellular structures are characterized by the large percentage of porosity and therefore large surface area. Therefore, they are extensively used as catalysts, filters, and biological interfaces. Besides, they ...
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Chapter and Conference Paper
Numerical Study of Intrinsic Stresses in Perovskite-on-Si Solar Cells with Intermetallic Bonding
semiconductors provide a suitable material candidate to fabricate optoelectronic devices such due to its low deposition cost and . On the other wafers provide a stable and cost-effective technology for e...
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Article
Thermodynamics Models for V-pit Nucleation and Growth in III-Nitride on Silicon
Silicon and sapphire are common substrates for AlN, InGaN, and GaN thin films in several applications such as photovoltaic and light-embedded diodes. Threading dislocations are generated at interfaces between ...
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Chapter and Conference Paper
Multi-scale Modeling of Hydrogen Embrittlement in High-Strength Steels
of high-strength steels are greatly influenced by hydrogen residing in the metal causing a well-known phenomenon of (HE). Hydrogen atoms enter the of high-strength steels reaching different such as ,...
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Chapter and Conference Paper
Dislocation-Based Thermodynamic Models of V-Pits Formation and Strain Relaxation in InGaN/GaN Epilayers on Si Substrates
The strain relaxation mechanism in III-N materials is occurred through the motion of that generated at III-N/Si as a result of large mismatch in lattice and thermal expansion coefficients. As a result of t...
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Article
Modelling of III-Nitride Epitaxial Layers Grown on Silicon Substrates with Low Dislocation-Densities
Large lattice and thermal expansion coefficients mismatches between III-Nitride (III N) epitaxial layers and their substrates inevitably generate defects on the interfaces. Such defects as dislocations affect the...
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Article
Atomistic Simulations of Carbon and Hydrogen Diffusion and Segregation in Alfa-Iron Deviant CSL Grain Boundaries
Polycrystalline materials’ mechanical properties and failure modes depend on many factors that include diffusion and segregation of different alloying elements and solutes as well as the structure of its grain...
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Article
Impact of angular deviation from coincidence site lattice grain boundaries on hydrogen segregation and diffusion in α-iron
Coincidence site lattice (CSL) grain boundaries (GBs) are believed to be low-energy, resistant to intergranular fracture, as well as to hydrogen embrittlement. Nevertheless, the behavior of CSL-GBs are general...
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Chapter and Conference Paper
Three-Dimensional Crystal-Plasticity Based Model for Intrinsic Stresses in Multi-junction Photovoltaic
Our understanding for intrinsic stresses and defects evolution in photovoltaic devices has became an essential part of new developments. In particular, Multi-Junction Photovoltaic (MJ-PV) modules depend on mul...
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Chapter and Conference Paper
Dislocation-Based Finite Element Modelling of Hydrogen Embrittlement in Steel Alloys
Mechanical properties of many metals are greatly influenced by hydrogen solutes causing a well-known phenomenon of Hydrogen Embrittlement (HE). Hydrogen atoms affect the dislocation core, materials cohesion, a...
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Chapter and Conference Paper
Atomistic Simulations of Carbon Diffusion and Segregation in α-Iron Grain Boundaries
Polycrystalline materials’ mechanical properties and failure modes depend on many factors that include segregation of different alloying elements as well as its grain boundaries (GBs) structure. Understanding ...
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Chapter and Conference Paper
Model-Based Damage Detection in Piezoelectric Fiber Based Composites
Piezoelectric Fiber-based Composites (PFCs) have significant potential as smart materials given their superior mechanical properties over piezoelectric wafers. Therefore, reliable models are needed to accurate...
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Chapter and Conference Paper
A Multi-Scale Based Model for Composite Materials with Embedded PZT Filaments for Energy Harvesting
Ambient vibrations are major source of wasted energy, exploiting properly such vibration can be converted to valuable energy and harvested to power up devices, i.e. electronic devices. Accordingly, energy harv...
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Chapter and Conference Paper
Solar Energy for Rural Egypt
Egypt is currently experiencing the symptoms of an energy crisis, such as electricity outage and high deficit, due to increasing rates of fossil fuels consumption. Conversely, Egypt has a high solar availabili...
