The effect of microstructure design on the oxidation and reduction behaviour of iron electrodes: Improving the performance of iron-air batteries

Pursuing sustainable and efficient energy storage technologies has led to advancements in iron-air batteries. Understanding the intricate relationship between the microstructural features of iron electrodes and their oxidation and reduction behaviour is crucial for optimizing battery performance and lifespan. This thesis aims to investigate the...

Planar Flow Casting and Microstructure of Aluminium Silicon Alloy

In order to scale the planar flow casting (PFC) process to industrial levels a Python model is created. The model which is based on a combination of empirical and theoretical equations, is used to explore the limits of the process. The model is independently verified with a Comsol simulation, which is extended with solidification and heat...

Thermal analysis of the Wire and Arc Additive Manufacturing process using the F.E. method

In this research, a thermal analysis of the wire and arc additive manufacturing process is presented based on the F.E. method. <br/><br/>An important quality of the F.E. model that is presented in this research is to describe the temperature field that is experienced by the deposited material in the wire and arc additive manufacturing process....

On the applicability of selective laser melting on pistons for the oil & gas industry: Fatigue limit and fracture toughness of selective laser melted TI6AL4V

Pistons for reciprocating compressors for industrial applications are often made of specialised materials. These prove to have problems with manufacture due to the high quality and short production times needed in combination with a low production volume per design. Additive manufacturing, specifically selective laser melting, could solve the...

bio-host glass: A recycled porous glass foam, developed for bioreceptive applications in the urban environment.

Dense urbanization increases the demand on the building sector who is responsible, on the one hand for producing large amounts of landfilled glass waste, and on the other for consuming the earth’s natural resources and release additional CO2 emissions, for the manufacture of new architectural glass. These unfavorable conditions together with the...

The influence of microstructural features on fatigue crack propagation in Ti­6Al­4V

In our modern world, where computers, mobile phones and many other applications have become indispensable, there is a growing need for high precision machines in order to be able to produce these technologies. For these complex high precision applications it is important to understand the fatigue properties of the materials used to prevent...

Effect of Retained Austenite on the Corrosion Behaviour of Q&P Processed Martensitic Stainless Steels

The fuel consumption of cars has become an important issue in the development of new materials and. These developments resulted in the generation of new grades of steel for the automotive industry. In particular, new advanced high strength steels (AHSS) have been developed for the automotive industry to lower fuel consumption (with weight...

Microstructure formation in tow spreading

In recent years, lightweight composites have become increasingly popular in several industries for the benefits they offer such as high strength to weight ratio, cost efficiency, tailorable properties and superior mechanical performance. The performance of these lightweight composites can be further optimized by using spread tows as a...

Predicting Thermal History, Microstructure and Hardness of Wire Arc Additive Manufactured Parts

Wire Arc Additive Manufacturing (WAAM) is a manufacturing technique with the ability to produce large metal parts with relatively complex geometrical shapes. One obstacle limiting full exploitation of WAAM in the industry is uncertainty on the mechanical properties of manufactured parts. Mechanical properties are strongly influenced by the...

3D Additive Manufacturing: Microstructural Evolution of HSLA Steel in WAAM process

This research mainly investigates the relationship between the process condition, the microstructural evolution and the mechanical properties of the low carbon S690 steel in complex WAAM deposited structures. Besides, the optimum process parameters for improving the quality of the multi-pass multi-layer structure are also the research topic in...

The effect of mineralogy and microstructure on sinter solid-state reduction

 Ironmaking in the blast furnace is a rather complex process, governed by the generation of multi-phases and fluid-flow conditions. It includes the reduction of iron ore pellet or sinter material towards producing metallic iron. The metallurgical behaviour of sinter and its reduction rate are controlled by its initial physical and chemical...

Optimization of scale-up of KNLN piezocomposites: for flexible haptic feedback applications

In this thesis, we focus on flexible haptic feedback applications which rely on the sensation of touch to display a feedback to the user that establishes a system to user interaction. Piezocomposites made of piezoceramic and polymer phases can be used here due to their high flexibility and piezoelectric properties that enable them to deform...

Architectured MIcrostructures: The effect of localized laser heat treatment on the microstructure of a FeCNi steel

Laser surface treatments offer interesting prospects for the creation of architectured microstructures formed by distinct phases in metastable austenitic steels. In the present study, a laser-based localised heat treatment was developed to locally create an austenitic region in a quenched Fe25Ni0.2C martensitic microstructure. The highly...

The effect of post process treatments on biomechanical properties of Ti6Al4V metamaterials and spinal cage implants manufactured by selective laser melting

Selective laser melting (SLM) is an additive manufacturing technique, which is currently on the rise of being used for manufacturing bone implants. Spinal cage, dental and hip implants can for example be manufactured using SLM. Ti6Al4V lattice structures, categorised as metamaterials, can be printed by SLM with mechanical properties close to...

Wire and Arc Additive Manufacturing of Thin Structures Using Metal-Cored Wire Consumables: Microstructure, mechanical properties, and experiment-based thermal model

In recent years, Wire and Arc Additive Manufacturing (WAAM), is gaining attractions both from academia and industry, because it has the potential to substitute or complement the traditional manufacturing methods. Traditional materials and methods are reaching their limitation when demanding and special applications are considered.<br/><br/>The...

Microstructure for thermal impedance spectroscopy for biofuel composition measurement

Biofuel sensors for measuring the ethanol and gasoline concentrations in bio-ethanol blends, have been studied world-wide and currently used in engine management in Flex-Fuel cars fabricated by amongst others, Ford Motor Company. However, water that results from ethanol sugar cane is inevitable present in the ethanol blend and requires a sensor...

Investigation on Viscoplastic Properties of Au-Sn Die-attach Solder

Reliability is one of the major research topics of modern electronic packaging technology. The characterization of Au-Sn dia-attach solder material properties, including viscoplastic properties is requested for fast and accurate reliability assessment by industry. In this thesis, a detailed experimental based methodology to characterize Au-Sn...

Waste Glass as Partial Binder Precursor and Fine Aggregate Replacement in Alkali Activated Slag/Fly ash System

Fast increasing of generation and release of undesirable pollutants by the industrialization raise concerns about the environmental consequences of waste disposal. Among these waste materials, non-recycled waste glass constitutes one of the majority wastes produced in many European countries and sets a major environmental issue. Although glass...