Publicaties
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Effects of carbonation and calcium leaching on microstructure and transport properties of cement pastes Universiteit Gent
During the past decades, a significant progress has been made in the development of concrete materials. With the development of high performance and self-compacting concrete, the design of concrete structures for hundred-year service life becomes possible. In recent years, concrete has been considered as a useful material for facilities with extremely long-term service life such as radioactive waste repositories. Therefore, the assessment of the ...
Microstructure and hemming properties of AA6016 aluminum alloy sheets Universiteit Gent
The use of Al-Mg-Si-(Cu) heat treatable 6xxx alloys is steadily increasing in the automotive industry. The possibility of weight reduction of the cars in combination with the good formability and high in-service dent resistance of these alloys, make them a favorable material for body panel applications. One of the most common, environment-friendly and easy to perform processes used to join aluminum sheets, is the hemming joining operation. This ...
The effect of soaking time after ultrafast heating on the microstructure and mechanical behavior of a low carbon steel Universiteit Gent
The main objective of this study is to understand the effect of the soaking time during the ultrafast heat treatment of a low carbon steel on its complex multi-phase microstructure, tensile mechanical behavior and properties of individual microconstituents. Tensile tests were performed to determine the macro-mechanical properties. Nanoindentation testing was carried out on individual microconstituents (martensite, recrystallized ferrite and ...
Influence of microstructure on mechanical properties of bainitic steels in railway applications Universiteit Gent
Wheel-rail contact creates high stresses in both rails and wheels, which can lead to di ff erent damage, such as plastic deformation, wear and rolling contact fatigue (RCF). It is important to use high-quality steels that are resistant to these damages. Mechanical properties and failure of steels are determined by various microstructural features, such as grain size, phase fraction, as well as spatial distribution and morphology of these phases ...
The effect of heating rate and soaking time on microstructure of an advanced high strength steel Universiteit Gent
This work focuses on the effect of soaking time on the microstructure during ultrafast heat treatment of a 50% cold rolled low carbon steel with initial ferritic-pearlitic microstructure. Dilatometry analysis was used to estimate the effect of heating rate on the phase transformation temperatures and to select an appropriate inter critical temperature for final heat treatments. A thorough qualitative and quantitative microstructural ...
On the microstructure of magnesium thin films deposited by magnetron sputtering Universiteit Gent
Direct current magnetron sputtering (DCMS), and high power impulse magnetron sputtering (HiPIMS) are used to deposit magnesium thin films. The latter technique is characterized by a higher degree of ionization and an ion energy distribution which is significantly altered towards a higher mean ion energy. These differences between both techniques are also reflected in the obtained microstructure of the deposited Mg thin films. DCMS grown films ...
Effect of silicate modulus on the setting, mechanical strength and microstructure of iron-rich aluminosilicate (laterite) based-geopolymer cured at room temperature Vrije Universiteit Brussel
This paper studies the alkali activation of iron-rich aluminosilicates (laterites). Three activating alkaline solutions were prepared from sodium hydroxide solution (8, 10 and 12 M) with sodium silicate (Na2SiO3) in order to obtain the sodium silicate solutions with moduli of SiO2/Na2O equal to 0.75, 0.92 and 1.04; H2O/Na2O=9.78, 10.45 and 12.04. The effects of above defined solutions on the setting time, physical and microstructural properties ...
Unravelling the aortic microstructure : synchrotron-based quasi-static pressure inflation of the mouse carotid artery Universiteit Gent
The contribution of the aortic microstructure to the mechanical behavior of the aortic wall is poorly understood. Several high-resolution techniques have been proposed to visualize elastic lamellae or collagen fibers, but most have a limited field of view and are challenging to perform in pressurized conditions. In recent experiments we visualized the micro-structure of mouse aortas using phase propagation imaging – a synchrotron-based technique ...
Comparison of microscopic techniques to study the diversity of the bitumen microstructure Universiteit Antwerpen
Bitumen characterisation and differentiation usually involve a combination of mechanical and chemical analyses. However, these methods provide limited information on the diversity caused by the binders' origin or processing method. Thus, the question arises whether the bitumen microstructure can be used to identify these issues. In this study, microscopic methods, including brightfield, darkfield and fluorescence optical inverse microscopy ...