A5088044391- Aluminum Alloy Microstructure Properties
- Aluminum Alloys Composites Properties
- Solidification and crystal growth phenomena
- Microstructure and mechanical properties
- High Temperature Alloys and Creep
- Recycling and Waste Management Techniques
- Metallurgical Processes and Thermodynamics
- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Superconductivity in MgB2 and Alloys
- Welding Techniques and Residual Stresses
- Bauxite Residue and Utilization
- Advanced Welding Techniques Analysis
- Advanced Materials Characterization Techniques
- Extraction and Separation Processes
- Advanced Thermoelectric Materials and Devices
- High-Temperature Coating Behaviors
- Photovoltaic Systems and Sustainability
- Metallurgy and Material Forming
- Thermal Expansion and Ionic Conductivity
SINTEF Industry
2021-2024
SINTEF
2021-2024
Norwegian University of Science and Technology
2015-2020
Excess vacancies play crucial roles in the precipitation of age-hardening precipitates aluminium alloys, but their spatial evolution across grains during heat treatments is less known. In this work, a numerical model developed to predict non-equilibrium excess cooling from solution treatment and ageing multicomponent alloys. A finite volume scheme applied derive distribution vacancy site fraction by solving diffusion equations under influence solute elements. Binding energies between atoms...
In an endeavor to promote semiconductor materials recycling, Bi-doped Mg2Si0.4Sn0.6 and Mg2Si0.6Sn0.4 thermoelectric compounds were synthesized by mechanical alloying using two types of processed Si kerf derived from the photovoltaic manufacturing industry. Powder X-ray diffraction SEM analysis provided a better understanding final phase formation. Rietveld refinements revealed structural changes existence Mg atoms at interstitial site 4b, which seem strongly affect electrical transport...
Fatigue resistance and fracture toughness are essential to the reliability of castings during service. Reducing microporosity in cast alloys is a crucial issue for improving their fatigue strength toughness. Here we report significant reduction aluminum-copper alloy developed using situ TiC nanoparticle additions coupled with stir-casting method. The addition nanoparticles found improve interdendritic feedability liquid metal as result reduces volume fraction by two orders magnitude compared...
Abstract A quantitative study on the kinetics of nucleation primary Si particles (PSPs), especially under effect P inoculation, during isothermal melt solidification hypereutectic Al–Si(–Cu) alloys has been realized for first time by using a unique micro-focus in situ X-radiography method, which is impossible synchrotron or tomography methods. The undercooling and rate PSPs have measured. Besides, TP-1 type test carried out. It found that reduced, while number density increased significantly...
Abstract A new numerical modelling approach integrating the Langer and Schwartz log-normal particle size distribution has been developed to depict precipitation kinetics of age-hardening precipitates in Al alloys. The framework implemented predict behavior key secondary phases 6xxx 7xxx alloys subjected artificial aging. simulation results are good agreement with available experimental data terms precipitate number density, radius, volume fraction. initial shape parameter entering modeling...
Phosphorus (P) is a critical impurity in metallurgical-grade Si that needed to be removed for solar-grade production. The Si-Ca-Al-P system one of the most crucial alloy systems refining, where P can separated by either Si-Al solvent refining or Si-Ca alloying-leaching process. In this work, series Si-Ca-Al alloys were obtained investigate role composition and CaAl2Si2 phase segregation separation. used alumina crucible led heavy Al contamination resulted unexpected compositions. CaSi2 found...
In this work, industrially processed silicon kerf loss (abbreviated to kerf) from the photovoltaic industry is assessed as an anode material for lithium-ion battery (LIB). The study includes both a characterization of different sources and comparison with commercially available nano-sized (40 100 nm) in electrochemical testing. Such direct between these two types testing provides new insight into material. particles are flake-like varying lengths, mean particle size (d50) measured ∼700 nm...
To precisely predict the grain size of inoculated aluminium alloy castings has been a big challenge for researchers in field solidification and casting. Up to date, most prediction models are based on Free Growth Model, which nucleation process is stopped by recalescence. In previous work [1], we have proposed new model applicable without present work, an in-situ X-ray radiographic study growth Al-Cu alloys during isothermal melt carried out, where effect convection minimized. The influences...
Abstract Inoculation is an important method to generate fine equiaxed grain structures in alloys during solidification, which widely used shape casting and direct chill processes of aluminium alloys. Different from the normal processes, welding additive manufacturing can have ultrahigh cooling rate temperature gradient solidification. This makes refinement by inoculation more difficult. Therefore, a deeper understanding on influences nucleation growth grains necessary. In this work,...
Abstract It is well known that the filtration efficiency of ceramic foam filters (CFF) on aluminum melt can be significantly reduced by addition grain refiner particles under a high inclusion load. Also, it usually considered process has little impact refinement efficiency. In this work, influence inclusions and effect AA 6060 alloy been studied. This was done through TP-1 type solidification experiments where prior to after filter during pilot-scale test investigated. experiments, 80 PPi...
Excess vacancies play crucial roles in the precipitation of age-hardening precipitates aluminium alloys, but their spatial evolution across grains during heat treatments is less known. In this work, a numerical model developed to predict non-equilibrium excess cooling from solution treatment and ageing multicomponent alloys. A finite volume scheme applied derive distribution vacancy site fraction by solving diffusion equations under influence solute elements. Binding energies between atoms...