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Browsing by Author "Govender, Gonasagren"

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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
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
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
Structure-property orientation relationship of a /a2/Ti5Si3 in as-cast Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy

Author: Mathabathe, Maria S ; Bolokang, Amogelang S ; Govender, Gonasagren ; Mostert, RJ ; Siyasiya, CW Date: Oct 2018 Structure-property relationship of the as-cast -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was examined. The phases stable at room temperature in the alloy were /a(sub)2/Ti(sub)5Si(sub)3, respectively; while their crystal structures ... 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
Warm temperature (170-280°C) uniaxial compresion of SiC reinforced MMCs

Author: Gxowa, Zizo ; Chown, LH ; Govender, Gonasagren Date: Oct 2017 This work evaluates the effect of warm temperature (170-280°C) uniaxial compression on the deformation behaviour of SiC reinforced Metal Matrix Composites (MMCs). Green and sintered compacts (d=8mm, h=12mm) were produced by blending 2124-Al ... Read more

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Browsing by Author "Govender, Gonasagren"

Browsing by Author "Govender, Gonasagren"

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