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Browsing by Impact Area "Advanced Casting Technologies"

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The adsorption of halogen molecules on Ti (110) surface

Author: Tshwane, David M ; Modiba, Rosinah ; Govender, Gonasagren ; Ngoepe, PE ; Chauke, R Date: Jan 2021 Adsorption of halogen on the metal surface has received much attention due to its technological applications and major relevance for material surface processing, corrosion protection and etching. In this work, first-principle approach was ... Read more
Adsorption-desorption of F2 diatomic molecule on Ti (100) surface at different coverages

Author: Tshwane, David M ; Modiba, Rosinah ; Govender, Gonasagren ; Ngoepe, PE ; Chauke, HR Date: Dec 2021 Fluorine molecules and ions are used as an etchant for metal surface processing. The presence of fluorine significantly influences the electrochemical behaviour on a metal surface, which has major relevance for etching, corrosion, electro-catalysis ... Read more
Challenges in machining of advanced materials

Author: Mathabathe, Maria N ; Bolokang, Amogelang S Date: May 2022 Contemporary ways of employing and combining existing materials are a requisite for meeting tomorrow’s engineering applications. This is upscaled by the potent attributes of remaining competitive by keeping costs effective while advancing the ... Read more
Effect of milling speed on the formation of Ti-6Al-4V via mechanical alloying

Author: Daswa, Pfarelo ; Gxowa, Zizo ; Monareng, Mathibe JI ; Mutombo, Kalenda Date: Oct 2018 Ti-6Al-4V alloys are well known for good corrosion resistance, excellent surface oxide biocompatibility and high specific strength. This paper investigates the influence of milling parameters on the formation of Ti-6Al-4V alloy processed using ... Read more
The effects of quaternary alloying additions on the TiAl alloy: Preferential site occupancy, interfacial energetics to physical parameters

Author: Mathabathe, Maria N ; Modiba, Rosinah ; Bolokang, Amogelang S Date: Aug 2021 The effect of Nb, Sn, Mn, and Si at a concentration of (0.3-2 at. %) on -TiAl based alloys’ preferential occupancy, interfacial energetics and mechanical properties were investigated by density functional theory (DFT) encompassed by the ... Read more
The electrochemical corrosion behaviour of Ti48Al-2Nb-0.7Cr-0.3Si alloy in 3.5%NaCl

Author: Magogodi, Steven M ; Mathabathe, Maria N ; Bolokang, Amogelang S ; Siyasiya, C Date: Nov 2022 Titanium aluminides (TiAl) have attracted industrial interest, particularly for high temperature applications owing to their promising mechanical properties. Due to the application of these materials to the marine environment it is therefore ... Read more
Grain structure orientational change in Ti6Al4V alloys induced by sea water quenching and novel stress relief annealing process

Author: Bolokang, Amogelang S ; Mathabathe, Maria N ; Motaung, DE ; Arendse, CJ ; Swart, HC Date: Mar 2023 We report on the microstructures and properties of Ti6Al4V alloys, which were achieved upon quenching in sea water medium with potential high cooling rate. The Ti6Al4V alloys were quenched at 1000 and 1100 °C, respectively. Moreover, the ... Read more
Investigation into the thermal behaviour of the B2–NiAl intermetallic alloy produced by compaction and sintering of the elemental Ni and Al powders

Author: Camagu, Sigqibo T ; Mathabathe, Maria N ; Motaung, David E ; Muller, TFG ; Arendse, CJ ; Bolokang, Amogelang S Date: Nov 2019 A cubic B2–NiAl alloy was synthesized by mixing of elemental Ni and Al powders followed by cold compacting and sintering of some samples at 750 °C and other samples at 1300 °C. The alloys sintered at 1300 °C exhibited a brittle B2–NiAl structure ... Read more
Laser cladding - a modern joining technique

Author: Bolokang, Amogelang S ; Mathabathe, Maria N Date: Apr 2021 The shroud shelve life of turbine blades depends on wear resistance. Thus, the wear of blade shroud shelves’ contact area ascertains the overall service life of gas turbine engines (GTE). Moreover, research shows that the life service of ... Read more
Overageing characteristics of alloy A356 and Al-Mg-Si casting alloys

Author: Daswa, Pfarelo ; Moller, H ; Govender, Gonasagren Date: Mar 2019 Al-Si-Mg casting alloys, such as Al-7Si-0.3Mg alloy A356, are heat treatable and can be precipitation hardened to the T6 temper condition. However, Al-Mg-Si casting alloys (5xx series) are generally not considered to be heat treatable. These ... Read more
Semi-solid casting of pure magnesium

Author: Curle, Ulyate A ; Wilkins, Jeremias D Date: Jan 2019 Semi-solid processing works on the principal of a solidification temperature interval of a substance. The substance is heated to a temperature within this interval so that there exists a related solid-liquid fraction ratio. The substance with ... Read more
Surface characterization of the cyclically oxidized -Ti-48Al-2Nb-0.7Cr alloy after nitridation

Author: Mathabathe, Maria N ; Govender, Gonasagren ; Siyasiya, CW ; Mostert, RJ ; Bolokang, Amogelang S Date: Aug 2019 Surface properties of the nitrided -Ti-48Al-2Nb-0.7Cr intermetallic alloy after cyclic oxidation was characterized. The nitride coating was successfully deposited after annealing of the Ti-48Al-2Nb-0.7Cr intermetallic alloy at 900 °C under ... Read more

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Browsing by Impact Area "Advanced Casting Technologies"

Browsing by Impact Area "Advanced Casting Technologies"

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