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Theses and Dissertations (Materials Science and Metallurgical Engineering)
Recent Submissions
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(University of Pretoria, 2021)A low-cost titanium production process, the CSIR-Ti powder process, which aims to produce titanium powder directly by metallothermic reduction of titanium tetrachloride with lithium, has been under development at the ...
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(University of Pretoria, 2021)Additive manufacturing can be used to produce complex, custom geometries, consolidating different parts into one. This reduces the required number of assemblies and allows distributed manufacturing with short lead times. ...
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(University of Pretoria, 2020)Among many shape memory alloys, Ti-Pt alloys have potential as a high temperature shape memory alloy. The alloy undergoes a reversible martensitic transformation at temperatures above 1000 oC. However, the alloy’s negligible ...
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(University of Pretoria, 2020)Surface transverse cracking is still one of the main problems in the continuous casting of steel. The cooling rate at the corners of the slab and strand is usually the highest. Therefore, depending on the cooling regime, ...
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Investigating the Effect of Adding a Disc Liner to the Mill Shell of a Vertical Stirred Media Mill (University of Pretoria, 2020)Comminution processes are used in the metallurgical industry to reduce the particle size of mined ores in order to liberate valuable minerals for downstream separation and extraction. Comminution is a very energy intensive ...
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(University of Pretoria, 2019)Ferritic stainless steel is typically used in the automotive industry to fabricate welded tube that is plastically deformed for flanging, bending and necking. The effect of welding parameters during autogenous gastungsten arc ...
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(University of Pretoria, 2019)Laser-powder bed fusion (L-PBF) processing finds its application in various metal forming industries such as aerospace, automotive and medical industries. Ti6Al4V alloy is widely used in aerospace applications. The main ...
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(University of Pretoria, 2020)The focus of the current study was to investigate dephosphorization of ferromanganese to produce a low P containing alloy that could effectively be used for the production of AHSS. The study involved conducting laboratory ...
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The development of a risk-based model to predict corrosion fatigue failures in subcritical boilers (University of Pretoria, 2020)The increased energy demand within South Africa has led to continued periods of load shedding. This has had an adverse impact on industry, quality of life and the economy as a whole. A larger requirement for production ...
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(University of Pretoria, 2021)This report investigates the cause of the reduction in workability and increased ageing of a blast furnace taphole clay. The taphole clay contains 60 mass% alumina, with a phenol-formaldehyde resole resin (PFR) and liquid ...
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(University of Pretoria, 2020)Preg-robbing gold ores reduce the gold recovered with conventional aqueous cyanide processing by adsorption of the leached gold onto the ore which is then lost to the residue. Many ore constituents adsorb gold in the ...
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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, ...