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Mattos Ferreira, V. (author)
The railway industry constantly seeks advancements in train speed, axle load capacity, reliability, and rail longevity. Rails undergo complex and severe loading during operation due to wheel/rail contact, resulting in two main damage mechanisms: rolling contact fatigue (RCF) andwear. Furthermore, frictional heating during wheel/rail contact...
doctoral thesis 2024
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Abraham Mathews, J. (author)
WIND turbines play a crucial role in the global transition towards a sustainable energy future. Maximizing energy production and ensuring a reliable operation is essential to harnessing the full potential of wind energy. Among the critical components, the main shaft bearings have for several years been a focal point due to their significant...
doctoral thesis 2024
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van Dokkum, J.S. (author)
Inelastic deformation is a common but often neglected phenomenon in experimental analysis of metal deformation and in contacts. This neglect leads to degraded measurement accuracy of material properties. Therefore a need arises for material models that a priori incorporate inelasticity. These material models must be simple and comprehensive to...
doctoral thesis 2023
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Jiang, Quanxin (author)
The need for more accurate cleavage modelling is particularly acute for a new generation of high-strength steels because they obtain their favourable properties through complex, multi-phase microstructures. One of the challenges in cleavage modelling is the strong sensitivity to material characteristics at the microlevel. This thesis proposes a...
doctoral thesis 2023
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Li, W. (author)
Multi-phase metallic materials such as Advanced High-Strength Steels (AHSS) are of great importance in a wide variety of high-tech industries due to their higher strength compared to conventional (mild) forming steels. The higher strength leads to various advantages in weight, safety and environmental friendliness. In order to develop new AHHS...
doctoral thesis 2022
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Traka, K. (author)
The present thesis investigates recrystallization and related phenomena in interstitial free (IF) and low carbon (LC) microstructures. Emphasis is given mostly on the early stages of recrystallization, i.e. nucleation stage. The investigations are performed with experimental measurements and computer simulations. In all studies,...
doctoral thesis 2022
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Sedighiani, K. (author)
The capability of high-resolution modeling of crystals subjected to large plastic strain is essential in predicting many important phenomena occurring in polycrystalline materials, such as microstructure, deformation localization, and in-grain texture evolution. However, due to the heterogeneity of the plastic deformation in polycrystals, the...
doctoral thesis 2022
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Marques Pereira, V. (author)
An approach to improve the performance of steels for fusion and fission reactors is to reinforce them with oxide nanoparticles. These can hinder dislocation and grain boundary movement and trap radiation-induced defects, thus increasing creep and radiation damage resistance. Steels containing these oxide particles are called ODS steels (Oxide...
doctoral thesis 2022
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Yilmaz, A. (author)
doctoral thesis 2021
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Schrama, F.N.H. (author)
In this PhD thesis, the desulphurisation in 21st century iron- and steelmaking is investigated. The current state of the art in sulphur removal in ironmaking and oxygen steelmaking is discussed (Part I of this thesis) and optimisation of the hot metal desulphurisation (HMD) slag, which is an important aspect of present day desulphurisation, is...
doctoral thesis 2021
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Ayenampudi, S. (author)
An effective way for the automotive industry to tackle the growing concern of CO2 emissions from automobiles is to reduce the overall weight of the vehicle, without compromising its performance and passenger safety. With the increasing demand of steels with enhanced properties in the last decade, the development of advanced high strength steels ...
doctoral thesis 2021
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Guo, X. (author)
Rare earth elements (REEs) are a group of 17 metallic elements, including 15 lanthanides, scandium and yttrium, which have remarkably similar chemical and physical properties. Nowadays, rare earth metals are widely used in such fields as electronics, petroleum, and metallurgy. Rare earth elements are considered as vitamin to modern industry and...
doctoral thesis 2021
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Vittorietti, M. (author)
This thesis aims at the development of physical relations between the intricate 3D features of metallic microstructures and the mechanical properties of the material. For understanding which are the microstructural determinants of the resultingmechanical behaviour of metals, a deep quantitative characterisation of the microstructure is needed....
doctoral thesis 2020
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Navarro Lopez, A. (author)
Advanced High Strength Steels (AHSS) have been used extensively for the last three decades in the automotive industry as they exhibit an enhanced combination of strength and ductility which has successfully allowed the weight reduction of structural components. This breakthrough has been highly beneficial for the environment, as lighter vehicles...
doctoral thesis 2020
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Gavel, D.J. (author)
The principal objective of this work is to understand the physicochemical behaviour of the ferrous raw material (pellet and/or sinter) bed mixed with nut coke under the blast furnace conditions. To investigate this behaviour, a specially designed blast furnace simulator called the Reduction Softening and Melting (RSM) apparatus is utilised ...
doctoral thesis 2020
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Post, J.R. (author)
The ironmaking blast furnace is the most efficient reactor for extracting iron from iron ore. Iron ore consists of iron oxides and in the blast furnace the iron oxides are reduced to iron and melted before it is transformed into steel in the steel plant. The lowest part or hearth of an ironmaking blast furnace plays no doubt the most important...
doctoral thesis 2019
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Ravi, A.M. (author)
The formation of bainite in steels is one of the most intensely researched topics in the field of metallurgy. Despite the importance of bainite among the modern-day steels, even a qualitative theory to explain the bainite formation still remains a subject of controversy due to the complexity of its formation mechanism. Currently, two competing...
doctoral thesis 2019
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Kumar, A. (author)
In this PhD thesis, we investigate the microstructural evolution and damage in different steel grades used in railway applications such as switches, crossings and curved tracks, which are the key components in the rail transportation industries around the world. The damage in these components leads to a maintenance cost of billions of Euros per...
doctoral thesis 2019
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Peelman, S. (author)
The rare earth elements (REEs) are a material group that is becoming increasingly important in modern day technologies, with applications in electronics (e.g. FeNdB magnets and luminescent phosphors), chemical industry (e.g. REE catalysts), energy industry (e.g. NiMH batteries and windmills) and medicine (e.g. Gd MRI contrast fluid). Considering...
doctoral thesis 2019
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Venkatesan, P. (author)
Rare earth elements (REEs), along with other metals, will play a pivotal role in the transition towards a low-carbon economy. Primary mining of REEs consists of multiple steps, is energy intensive and has an adverse environmental impact. Thus, the current scenario of “use and throw” of REEs after a single use in a product is untenable....
doctoral thesis 2019
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