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Browsing by Author "Mathabathe, Maria N"

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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
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
Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy

Author: Mathabathe, Maria N ; Govender, Gonasagren ; Bolokang, Amogelang S ; Mostert, RJ ; Siyasiya, CW Date: May 2018 The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstätten laths. High temperature differential thermal analysis (HTDTA) was ... Read more
Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy

Author: Mathabathe, Maria N ; Govender, Gonasagren ; Bolokang, Amogelang S ; Mostert, RJ ; Siyasiya, CW Date: Aug 2018 The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstatten laths. High temperature differential thermal analysis (HTDTA) was ... Read more
Powder characteristics blending and microstructural analysis of a hot-pack rolled vacuum arc-melted γ-tial-based sheet

Author: Ellard, John JM ; Mathabathe, Maria N ; Siyasiya, CW ; Bolokang, Amogelang S Date: Nov 2022 In the quest for cost-effective fabrication processes capable of producing sound γ-TiAl products, the microstructure and mechanical properties of a modified second-generation hot-rolled γ-TiAl-based alloy with nominal composition Ti-48Al-2N ... 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
The vacuum melted y-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties

Author: Mathabathe, Maria N ; Bolokang, Amogelang S ; Govender, Gonasagren ; Mostert, RJ ; Siyasiya, CW Date: Aug 2018 The y-TiAl intermetallic alloy doped with Nb, Cr, and Si metals has been developed. It has emerged that the ternary Ti-48Al-2Nb and quinary Ti-48Al-2Nb-0.7Cr-0.3Si alloys yielded the best mechanical and cyclic oxidation properties. In particular, ... Read more

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Browsing by Author "Mathabathe, Maria N"

Browsing by Author "Mathabathe, Maria N"

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