Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Micro-porosity"”.
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The influence of micro-porosity on drainage relative permeability using digital core analysis
High resolution images acquired from X-ray micro-tomography provide 3D pore geometry on which flow and transport properties can be computed. However, these images exhibit limited resolution in particular if field of view needs to be optimised at the same time. Constrained by the image resolution, …
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Impacts of Rock-Brine Interactions on Petrophysical Properties of a Sandstone Reservoir, Utilizing Geochemical and Pore Network Modeling
… permeability. To build the pore network, micro-CT scan images were acquired from three core samples. The image segmentation was done considering the results of rock characterization studies. After completing the objective segmentation, the anticipated geochemical changes were incorporated …
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Fundamental research regarding the ultrasonic stirring effects on the microstructure of A356 castings
… has significant effects on the solidification microstructure of A356 alloy, which includes grain structure, distribution of inclusions, refinement of secondary phases, etc. The primary causes are due to ultrasonic cavitation, acoustic streaming and propagation of ultrasound waves in media. …
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Atributos físicos e biológicos do solo sob diferentes condições de uso nas várzeas de Sousa (PB)
… biological attributes that were analyzed were microbial diversity (colony forming units), microbial activity (basal respiration) and edaphic macrofauna (Tropical Soil Biology and Fertility). Physical characterization was performed for the attributes of textural analysis; soil density, macro and …
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THE STRUCTURE AND REACTIVITY OF SOME METALLURGICAL CARBONS
The reactivity and micro-structure of three coals and two cokes used in iron and steel manufacture have been studied by a variety of techniques, including gas sorption analysis, thermal analysis and microscopy. Changes in surface areas and porosities of the coals and cokes during combustion have …
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Qualifizieren des Laserstrahl-Auftragschweißens von BLISKs aus Nickel- und Titanbasislegierungen
… due to an achieved recrystallization. Due to micro bonding defects and micro porosity the achievable dynamic mechanical properties are not fulfilling the specifications. By stress relieving static and dynamic mechanical properties are achievable for LMD Ti-6Al-4V which correlate with a …
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Topographic characterization of polymer materials at different length scales and the mechanistic understanding of wetting phenomena
… and orientation) on resulting macro-, meso- and micro-topography was studied. A model to conceptualize the influence of the most important moulding conditions on topographic characteristics and, as a consequence, on the quality of the resulting surface was presented. To quantify the effect of …
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Direct Metal Laser Sintering of Titanium implant with Tailored structure and Mechanical Properties
… processing parameters, the corresponding microstructures and the mechanical properties. The main purpose is to have a body of fundamental knowledge about the laser and titanium powder material interactions, thus establishing the factors that influence the process-structure-properties …
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A study on the effect of increased heat input on residual stress, microstructure evolution and mechanical properties in Ti6Al4V selective laser melting
… Heat input also has a big influence on the microstructure produced which determines the resultant mechanical properties. The focus of this project was to investigate the effect of increased heat input on residual stress, the development of microstructure and mechanical properties of Ti6Al4V …