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Theses and Dissertations (Materials Science and Metallurgical Engineering): Recent submissions
Now showing items 21-40 of 163
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(University of Pretoria, 2021)The use of magnetite as a medium in the wet processing of coal has been used since the early days of dense medium separation. The high magnetic susceptibility and density of magnetite make it an ideal medium to use in wet ...
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(University of Pretoria, 2019)The -TiAl based intermetallic alloys play an important role in structural applications, such as aerospace and automotive industries. The current work studied the novel development and microstructural evolution, along ...
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(University of Pretoria, 2018)The susceptibility to solidification cracking of unstabilized and stabilized ferritic stainless steels was investigated using self-restrained Houldcroft, Modified Varestraint-Transvarestraint (MVT), and hot tensile testing. ...
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(University of Pretoria, 2020)The automotive industry currently demands materials with improved formability and crash performance. Austenitic stainless steels have been singled out for potential development of high strength steels to achieve exceptional ...
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(University of Pretoria, 2020-08)The use of iron ore concentrate has become of interest as the demand for higher grade sinter feed is increasing. The fine nature of the concentrate however raises concerns as it can affect permeability during sintering ...
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(University of Pretoria, 2020)This research project investigated the option of steelmaking with the ESS furnace by using computational modelling to estimate steady state decarburisation rates. It focused on understanding metallurgical phenomena that ...
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(University of Pretoria, 2020-02-09)Vanadium carbonitride is commonly used in the steel making industry to improve the mechanical properties of steel. It is produced by the reduction reaction of vanadium trioxide (V2O3) or vanadium pentoxide (V2O5) with ...
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(University of Pretoria, 2018)Compared to conventional arc welding processes, laser metal deposition is a low heat input, low dilution welding process. Weld overlay of thin wall components can be done successfully with low distortion and low dilution, ...
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(University of Pretoria, 2019)In the petrochemical industry, carbon steels exposed to H2S environments may be susceptible to stress-corrosion cracking. A tensile residual stress and high hardness increases the risk of cracking in H2S environments. NACE ...
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(University of Pretoria, 2019)In the petrochemical industry, carbon steels exposed to H2S environments may be susceptible to stress-corrosion cracking. A tensile residual stress and high hardness increases the risk of cracking in H2S environments. NACE ...
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(University of Pretoria, 2017)Successful electrowinning and electrorefining processes for the production of high purity and compact electroplated metal require the optimization of the electrolyte composition and operating parameters. In nickel ...
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(University of Pretoria, 2019)The upper-sidewall of a typical PGM smelter is lined with synthetic graphite at the hot-face. Copper waffle coolers located behind the graphite extract the heat away from the refractory. The sufficient cooling provided by ...
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(University of Pretoria, 2019)Dry beneficiation of coal as alternative to water-based methods is in high demand, especially in arid geological environments. Benefits of this dry process include that it eliminates the need for water use, while high ...
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(University of Pretoria, 2018)An empirical equation was developed for the prediction of the critical strain for the onset of dynamic recrystallization (DRX) in microalloyed Nb-containing steels. Single-rolling pass isothermal compression tests were ...
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(University of Pretoria, 2018)The role of retained austenite on the performance of cast iron based grinding media (balls) is somewhat controversial. One school of thought is that retained austenite improves the performance through work hardening and ...
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(University of Pretoria, 2018)The influence of heat input on the as-welded microstructure and hardness of autogenous bead-on-plate gas tungsten arc welds on nuclear grade Zircaloy-2 was investigated. In addition, the β-α transformation behaviour was ...
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(University of Pretoria, 2019)The service performance of zirconium-2.5niobium components is largely dependent on the microstructure and mechanical properties achieved through a specific thermo-mechanical process applied during manufacturing. Welding ...
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(University of Pretoria, 2018)In this study, the iron-titanium-vanadium-oxygen (Fe-Ti-V-O) system in equilibrium with air was studied experimentally by high-temperature equilibration, quenching, scanning electron microscope and microprobe analysis ...
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(University of Pretoria, 2019)This study investigates the carbide-free bainitic steels for forged rail wheel applications in South Africa. This project emanated from the need for durable rail steels by the South African industry, particularly for wheel ...
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(University of Pretoria, 2017)European REACh regulations are aimed at the complete removal of the toxic and carcinogenic cadmium and hexavalent chromium coatings currently being employed for corrosion protection of ultra-high strength steel and other ...
Now showing items 21-40 of 163