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Browsing by Author "Popoola, P"

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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 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
Effect of laser parameters on the properties of high entropy alloys: A preliminary study

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: May 2020 This preliminary study investigates the fabrication of Al-Co-Cr-Fe-Ni-Cu and Al-Ti-Cr-Fe-Co-Ni High Entropy Alloys with the Laser Deposition Technique. The effect of the laser parameters on the microstructure and hardness properties of the ... Read more
Effect of powder flowrate on the microstructure of FeCrV15 clad, developed via the laser cladding technique

Author: Aramide, B ; Sadiku, R ; Popoola, P ; Pityana, Sisa L ; Jamiru, T Date: Feb 2022 Steel utilized in mining and tillage devices is highly susceptible to wear and corrosion attacks due to its poor tribological property when presented to unfavorable working conditions common to mining and tillage activities. This leads to an ... Read more
Electrical resistivity and oxidation behavior of Cu and Ti doped laser deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: Sep 2022 In this study, AlCoCrFeNi–Cu (Cu-based) and AlCoCrFeNi–Ti (Ti-based) high entropy alloys (HEAs) were fabricated using a direct blown powder technique via laser additive manufacturing on an A301 steel baseplate for aerospace applications. The ... Read more
Evaluation of chitosan/sisal fiber/polyethylene membranes

Author: Agboola, O ; Fayomi, OSI ; Sadiku, ER ; Ayoola, A ; Mokrani, T ; Mbuli, BS ; Popoola, P ; Perry, Goitseona S Date: Jul 2020 Composites of ternary blend of chitosan/sisal fiber/high density polyethylene, were prepared by using the Rheomixer, followed by hot press, in order to form dense microfiltration membranes. The effective operation of the membranes was tested ... Read more
Fabrication and hardness behaviour of high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, A ; Lengopeng, Thabo Date: Feb 2020 Laser additive manufacturing is a direct energy deposition process which manufactures components from 3D model data in progressive layers until a whole part is built as opposed subtractive manufacturing. However, during the procedure, the ... Read more
High entropy alloys for aerospace applications

Author: Dada, M ; Popoola, P ; Adeosun, S ; Mathe, Ntombizodwa R Date: Sep 2019 In the aerospace industry, materials used as modern engine components must be able to withstand extreme operating temperatures, creep, fatigue crack growth and translational movements of parts at high speed. Therefore, the parts produced must ... Read more
High entropy alloys for aerospace applications

Author: Dada, M ; Popoola, P ; Adeosun, S ; Mathe, Ntombizodwa R Date: Sep 2019 In the aerospace industry, materials used as modern engine components must be able to withstand extreme operating temperatures, creep, fatigue crack growth and translational movements of parts at high speed. Therefore, the parts produced must ... Read more
Improving the durability of tillage tools through surface modification - a review

Author: Aramide, B ; Pityana, Sisa L ; Sadiku, R ; Jamiru, T ; Popoola, P Date: Jun 2021 Farming tools are often exposed to high wear rate in dry agricultural land areas. This makes the farming activity to have problems of recurrent labour, idle time, and the extra expenses in replacing the damaged implements like ploughshares. ... Read more
In-situ reactive synthesis and characterization of a high entropy alloy coating by laser metal deposition

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: Mar 2022 In this study, we investigate the influence of in situ reactive synthesis of Ti6Al4V– AlCoCrFeNiCu high entropy alloys by laser metal deposition on the microstructural and mechanical properties of the as-built alloy as opposed to the traditional ... Read more
Influence of extra chromium addition on the microstructure, hardness, and corrosion behaviour of high carbon ferrochrome FeCrV15 deposited through laser cladding on steel baseplate for tillage application

Author: Aramide, B ; Popoola, P ; Sadiku, R ; Jamiru, T ; Pityana, Sisa L Date: Nov 2021 Laser cladding is an additive manufacturing technology utilised in surface strengthening, modification, and repair of components subjected to adverse working conditions, such as tillage tools, which is accomplished by adding functionally ... Read more
Influence of Ti and Cu on the corrosion properties of laser-deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Dlamini, Thembisile P ; Aramide, O Date: Nov 2021 In this study, AlCoCrFeNiCu (Cu-based) and AlCoCrFeNiTi (Ti-based) high entropy alloys were fabricated using laser additive manufacturing. The influence of the alloying elements and the laser processing parameters, the laser power and scanning ... Read more
Influence of vanadium-chromium carbide on the microstructure of reinforced FeCrV15 hardfacing

Author: Aramide, B ; Pityana, Sisa L ; Jamiru, T ; Popoola, P ; Sadiku, R Date: Aug 2021 The increasing manufacturing technologies are a crucial aspect of industrialization. Laser additive manufacturing is the process of manufacturing using laser (heat) technology to manufacture components from scratch and or strengthening and ... Read more
Investigating the elastic modulus and hardness properties of a high entropy alloy coating using nanoindentation

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Adeosun, S ; Pityana, Sisa L Date: Sep 2021 Using a focused ion beam TTX-NHT3 Nanoindentation tester with a load of 500 mN, we study the micromechanical properties of laser-deposited AlCoCrFeNiCu high entropy alloy coatings. The indentation tests conducted were used to examine the ... Read more
Laser surface deposition of niobium and titanium-niobium on Ti6A14V substrates for biomedical applications

Author: Pityana, Sisa L ; Baloyi, N ; Tlotleng, Monnamme ; Popoola, P Date: Apr 2019 The advantages of using Nb and Ti-Nb coatings for improving the hardness and corrosion resistance of Ti6Al4V were investigated. It has been reported that Ti6Al4V used in orthopaedic implants tends to release toxic Al and V ions into the ... Read more
Laser-assisted coating of TI6AL4V substrate with Zinc

Author: Baloyi, NM ; Pityana, Sisa L ; Tlotleng, Monnamme ; Meacock, C ; Popoola, P Date: Dec 2012 Laser coating is an advanced coating technology used for improving the surface properties of metal components. The coatings produced are thick, dense, and crack-free with continuous non-porous microstructures having uniform composition which ... Read more
The microstructure and anti-wear property of FeCrV15 and FeCrV15+Cr deposits fabricated via laser deposition on steel base-plate for soil-working tools

Author: Aramide, B ; Sadiku, R ; Popoola, P ; Pityana, Sisa L ; Jamiru, T Date: May 2022 The upgrade of the anti-wear property of steel base-plate for soil-working tools was done by depositing chromium–vanadium carbide deposits in situ via powder imbuement of FeCrV15 powder through laser cladding. The created specimens were exposed ... Read more
The microstructure and the wear performance of high carbon ferrochrome Fecrv15 and Fecrv15+cr manufacture through laser additive manufacturing on steel baseplate for tillage application

Author: Aramide, B ; Sadiku, R ; Popoola, P ; Pityana, Sisa L ; Jamiru, T Date: Jan 2022 The enhancement of wear performance of steel baseplate for tillage application was carried out by manufacturing vanadium-chromium carbide coatings in situ by powder infusion of high carbon ferrochrome FeCrV15 powder through laser additive ... Read more

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