Essays about: "Complex microstructures"

Showing result 1 - 5 of 7 essays containing the words Complex microstructures.

  1. 1. Multi-Scale Topology Optimization of Lattice Structures Using Machine Learning

    University essay from Uppsala universitet/Tillämpad mekanik

    Author : Julia Ibstedt; [2023]
    Keywords : Topology optimization; Multi-scale topology optimization; Machine learning; Gaussian process; Homogenization; Inverse homogenization; Anisotropic materials; Symmetry groups; Material property space; Topologioptimering; Flerskalig topologioptimering; Maskininlärning; Gaussian process; Homogenisering; Anisotropa material; Symmetrigrupper; Materialegenskapsrymd;

    Abstract : This thesis explores using multi-scale topology optimization (TO) by utilizing inverse homogenization to automate the adjustment of each unit-cell's geometry and placement in a lattice structure within a pressure vessel (the design domain) to achieve desired structural properties. The aim is to find the optimal material distribution within the design domain as well as desired material properties at each discretized element and use machine learning (ML) to map microstructures with corresponding prescribed effective properties. READ MORE

  3. 2. The Effect of Process Parameters on Columnar-To-Equiaxed-Transition (CET) During Electron Beam-Powder Bed Fusion of Ferritic Stainless Steel

    University essay from KTH/Materialvetenskap

    Author : Doom Eleanor Ihensekhien; [2022]
    Keywords : Additive manufacturing; E-PBM; Inoculation; process parameters; TiN; CET;

    Abstract : Electron Beam Powder Bed Fusion manufacturing of components is an additive manufacturing process that is complex and has widespread advantages for aerospace and many industrial processes. It reduces costs and has a larger powder particle size requirement. READ MORE

  4. 3. Machine Learning Methods for Segmentation of Complex Metal Microstructure Features

    University essay from KTH/Materialvetenskap

    Author : Daniel Fredriksson; [2022]
    Keywords : Machine learning; Metallography; Automatic segmentation; Complex microstructures; Random Forest classifier.; Maskininlärning; Metallografi; Automatisk segmentering; Komplex mikrostruktur; Random Forest klassificerare;

    Abstract : Machine learning is a growing topic with possibilities that seems endless with growing areas of applications. The field of metallography today is highly dependent on the operators’ knowledge and technical equipment to perform segmentation and analysis of the microstructure. Having expert dependents is both costly and very time-consuming. READ MORE

  5. 4. Erosion Behaviour of Thermal Barrier Coatings

    University essay from Linköpings universitet/Konstruktionsmaterial

    Author : Caroline Wännman; [2021]
    Keywords : erosion; TBC; APS; EB-PVD; PS-PVD; failure mechanisms;

    Abstract : Thermal barrier coatings (TBCs) are advanced material systems used in the hot sections of gas turbines. The TBCs are designed to provide insulation against hot gases by a ceramic top coat and to provide oxidation and corrosion resistance by a metallic bond coat. READ MORE

  6. 5. Design and Development of Light Weight High Entropy Alloys

    University essay from Högskolan i Jönköping/JTH, Material och tillverkning

    Author : Akash Avinash Gondhalekar; [2019]
    Keywords : High Entropy Alloys; CCAs; Solid Solutions; Intermetallic Compounds; Thermodynamic; Multicomponent; Microstructure; Mechanical Properties;

    Abstract : The main aim of this thesis was to design and develop new Aluminium based compositionally complex alloys (CCAs) using the high entropy alloy (HEA) concept, and to understand their evolution of microstructures during casting and also after the secondary process which is heat-treatment, and finally to evaluate their subsequent mechanical properties. Prior to the development of alloys, a computational technique ThermoCalc was used which helped in understanding the phase formation in various results. READ MORE