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Browsing Journal Articles by Cluster "Manufacturing"

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2D numerical model for heat transfer on a laser deposited high entropy alloy baseplate using Comsol Multiphysics

Author: Dada, A ; Popoola, P ; Mathe, Ntombizodwa R ; Adeosun, S ; Aramide, O Date: Dec 2021 In an optimization study, cracks were observed in the microstructures of laser-deposited HEAs on a steel baseplate from residual stresses, thus, the optimization of crack-free microstructures was achieved by the optimization of the laser ... Read more
Addition of Chromium and its effect on the microstructure and mechanical properties of laser- coated high carbon ferrochrome alloy on mild steel

Author: Aramide, BP ; Popoola, P ; Sadiku, R ; Jamiru, T ; Pityana, Sisa L Date: Aug 2021 Laser cladding is an additive manufacturing technology that can be utilized in surface strengthening, modification, and repair of components that are subjected to adverse working conditions. This can be accomplished by the addition of ... Read more
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 of NH3 and NO2 molecules on sn-doped and undoped ZnO (101) surfaces using density functional theory

Author: Dima, Ratshilumela S ; Tshwane, David M ; Shingange, Katekani ; Modiba, Rosinah ; Maluta, NE ; Maphanga, Rapela R Date: 2022 The adsorption and interaction mechanisms of gaseous molecules on ZnO surfaces have received considerable attention because of their technological applications in gas sensing. The adsorption behavior of NH3 and NO2 molecules on undoped and ... 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
Analysis of dry sliding wear performance of tribaloy T-800/Tungsten carbide coating deposited via laser cladding assisted with preheating

Author: Nyadongo, ST ; Olakanmi, EO ; Pityana, Sisa L Date: Oct 2022 Shafts, gears, axles and crankshafts, which are exposed to severe sliding wear environment, are made from wear resistant EN8 medium carbon steel. The wear resistance of EN8 can be enhanced by depositing it with laser cladding assisted with ... Read more
Anomaly detection monitoring system for healthcare

Author: Boloka, Tlou J ; Crafford, Gerhardus J ; Mokuwe, Mamuku W ; Van Eden, Beatrice Date: Jan 2021 Most developing countries suffer from inadequate health care facilities and a lack of medical practitioners as most of them emigrate to developed countries. The outbreak of the COVID-19 pandemic has left these countries more vulnerable to ... 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
Chemical sensor nanotechnology in pharmaceutical drug research

Author: Thobakgale, Setumo L ; Ombinda-Lemboumba, Saturnin ; Mthunzi-Kufa, Patience Date: Aug 2022 The increase in demand for pharmaceutical treatments due to pandemic-related illnesses has created a need for improved quality control in drug manufacturing. Understanding the physical, biological, and chemical properties of APIs is an important ... Read more
The combination of low level laser therapy and efavirenz drastically reduces HIV infection in TZM-bl cells

Author: Lugongolo, Masixole Y ; Manoto, Sello L ; Ombinda-Lemboumba, Saturnin ; Maaza, M ; Mthunzi-Kufa, Patience Date: Jun 2020 Human immunodeficiency virus (HIV) infection remains a global health challenge despite the use of antiretroviral therapy, which has led to a significant decline in the mortality rates. Owing to the unavailability of an effective treatment to ... Read more
The comparative study of the microstructural and corrosion behaviour of laser-deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Aramide, O Date: Jun 2021 Corrosion is a conservational occurrence that has a large economic impact on most metals and its alloys because it destroys and deteriorates most materials by an electrochemical process through the reaction of these materials with the ... Read more
Conceptual design framework for setting up aluminum alloy powder production system for Selective Laser Melting (SLM) process

Author: Matsagopane, G ; Olakanmi, EO ; Botes, Annelize ; Kutua, S Date: May 2019 Documentation on the correct process and component requirements for setting up efficient aluminum powder production systems capable of manufacturing powder that meets the requirements for the selective laser melting (SLM) process is not ... Read more
Coupled heat transfer, fluid flow and solidification kinetics for laser additive manufacturing applications

Author: Khomenko, MD ; Makoana, Nkutwane W ; Pityana, Sisa L ; Mirzade, FKH Date: Jul 2021 A new coupled heat transfer and solidification kinetics model is developed for the optimization of microstructure during laser additive manufacturing applications. The Johnson–Mehl–Avrami–Kolmogorov equation is applied in a self-consistent ... Read more
Crack mitigation in laser engineered net shaping of WC-10wt%FeCr cemented carbides

Author: Molobi, E ; Sacks, N ; Theron, Maritha Date: Apr 2022 Laser engineered net shaping of a WC-10wt%FeCr cemented carbide showed cracking during deposition despite using a full factorial design of experiments matrix along with single and multiple objective optimization models to establish an optimal ... Read more
Design and manufacturing of an aggregate abrasion test device for testing in high acceleration field

Author: Xungu, Sipho ; Mgangira, Martin B ; Giani, John C Date: Nov 2021 This paper describes the design and manufacturing of a mechanical system, the Aggregate Abrasion Test Device (AATD), which comprises of a rolling model drum, with the purpose of obtaining experimental data that is subsequently used to quantify ... Read more
Design and simulation of a bearing housing aerospace component from titanium alloy (TI6AL4V) for additive manufacturing

Author: Oyesola, M ; Mpofu, K ; Daniyan, I ; Mathe, Ntombizodwa R Date: Dec 2022 In evaluating emerging technology, such as additive manufacturing, it is important to analyse the impact of the manufacturing process on efficiency in an objective and quantifiable manner. This study deals with the design and simulation of a ... Read more
Designing a Sn-slag composite with possible non-toxic applications to provide a pure metal casting environment

Author: Bolokang, Amogelang S Date: Feb 2019 Foundry slag formed during the production of medium carbon steel was milled into powder which was then compacted into blocks to form heat treatment furnace refractory materials. The foundry slag was ball-milled into powders which were further ... Read more
Detection of mycobacterium tuberculosis using gold nanoparticles conjugated to TB antibodies

Author: Maphanga, Charles P ; Manoto, Sello L ; Ombinda-Lemboumba, Saturnin ; Mthunzi-Kufa, Patience Date: Mar 2021 In recent years, conjugated nanoparticles have gained significant applications in diagnostics, particularly gold nanoparticles (AuNPs). When functionalized with antibodies, AuNPs can selectively interact with cells and biomolecules. The ... Read more
Development of ideal processing parameters for powder bed fusion system processing of AlSi10Mg using design of experiments

Author: Mathe, Ntombizodwa R Date: Aug 2021 The additive manufacturing of aluminium alloys has gained great interest in the transport industry in the past 10 years. This is mainly due to the lightweight and good strength that these alloys offer especially for applications in aerospace ... Read more
Directed energy deposition of a cemented tungsten carbide rotary burr prototype

Author: Molobi, E ; Sacks, N ; Theron, Maritha Date: Nov 2021 In this study a cemented tungsten carbide rotary burr prototype was fabricated using directed energy deposition based on an optimal parameter set which was previously derived from a full factorial design of experiments matrix approach. Finite ... Read more

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