Author:Lekoadi, Paul M; Tlotleng, Monnamme; Annan, K; Maledi, N; Masina, Bathusile NDate:Feb 2021This study presents the investigation on how heat treatment parameters, which are temperature, cooling method, and residence time, influence the microstructural and hardness properties of Ti6Al4V components produced on Ti6Al4V substrate using ...Read more
Author:Glaser, Daniel; Polese, C; Venter, AM; Marais, D; Plaisier, JRDate:Mar 2022Engineering of component surfaces using Laser Shock Peening (LSP) requires optimisation of key process parameters to enhance performance through the generation of beneficial compressive residual stresses. Quantification of residual stress ...Read more
Author:Nyadongo, ST; Olakanmi, EO; Pityana, Sisa LDate:Sep 2021Laser cladded (LC) tribaloy (T-800) coating has been used for surface modification of engineering components in high wear and elevated temperature service environments. However, the cracking phenomenon often observed in LC T-800 coating is ...Read more
Author:Nzengue, AGB; Mpofu, K; Mathe, Ntombizodwa R; Daniyan, I; Muvunzi, RaDate:Jul 2023The chase for sustainable manufacturing that contributes to addressing climate change is of research interest across scientists and industrial sectors. The lightweight and high strength properties of aluminium alloys foster sustainable cost, ...Read more
Author:Malatjia, N; Popoola, API; Pityana, Sisa L; Lengopeng, TDate:Jun 2021Ti10Fe5Si5Cr3Nb composite coatings were fabricated using laser cladding technique. Laser power was varied from 800W to 1200W while the scanning speed was kept constant at 1.5 m/min. The microstructural analysis of the samples was conducted ...Read more
Author:Arthur, Nana KK; Siyasiya, CW; Pityana, Sisa L; Tlotleng, MonnammeDate:Jan 2022During the laser metal deposition additive manufacturing processing of Ti6Al4V ELI alloy, the parts produced were exposed to high levels of thermal gradients, which resulted from rapid heating and cooling rates in the material. This had an ...Read more
Author:Mathoho, I; Akinlabi, ET; Arthur, Nana KK; Tlotleng, MonnammeDate:Aug 2020This study investigated the influence direct energy deposition (DED) process parameters have on the metallurgical characteristics (porosity, microstructural evolution, microhardness, and corrosion behavior) of 17−4 PH stainless steel powder. ...Read more
Author:Aramide, B; Pityana, Sisa L; Sadiku, R; Jamiru, T; Popoola, PDate:Jun 2021Farming 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
Author:Raji, SA; Popoola, API; Pityana, Sisa L; Popoola, OM; Raji, NK; Tlotleng, MonnammeDate:Feb 2022Gamma titanium aluminide ( -TiAl) alloys are lightweight materials with potential application for high-temperature components. But their ductility at room temperature impedes widespread production of parts via traditional processing routes. ...Read more
Author:Dada, M; Popoola, P; Mathe, Ntombizodwa R; Pityana, Sisa L; Adeosun, SDate:Mar 2022In 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
Author:Ramasobane, P; Mashinini, PM; Masina, Bathusile NDate:Oct 2021Titanium-based alloys are reported to offer up to 50% strength to weight ratio. These lands titanium-based alloys as a preferred material over steel and nickel-base super-alloys, where strength and stiffness are required. Regardless titanium-based ...Read more
Author:Aramide, B; Popoola, P; Sadiku, R; Jamiru, T; Pityana, Sisa LDate:Nov 2021Laser 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
Author:Mathoho, Ipfi; Sibisi, TDate:Jan 2024The quality and performance of additively manufactured part is linked to the process parameters such as laser power, scanning speed, powder feed rate, and layer thickness. However, hatch spacing is one of the process parameters that affect ...Read more
Author:Raji, SA; Pityana, Sisa L; Popoola, API; Popoola, OM; Arthur, Nana KK; Tlotleng, MonnammeDate:Oct 2021In this work, the microstructure and nanoindentation hardness properties of Ti-Al-Si-xMo alloys produced through laser in-situ alloying using laser engineered net shaping (LENS) technology were investigated. The microstructures and phases ...Read more
Author:Aramide, B; Pityana, Sisa L; Jamiru, T; Popoola, P; Sadiku, RDate:Aug 2021The 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
Author:Molobi, E; Sacks, N; Theron, MarithaDate:Oct 2021The influence of z-increment on profile, porosity and microstructure of WC-10wt%FeCr single walls deposited using direct energy deposition was studied. Traverse speeds of 3.2 and 6.4 mm/s were used, while laser power was varied at 200, 300 ...Read more
Author:Tlotleng, Monnamme; Pityana, Sisa L; Motha, SDate:May 2023The effects of micro-alloying gamma titanium aluminide ( -TiAl) with niobium (Nb) using a laser melt pool as a melting pot are reported. The Optomec LENS machine was used to carry out the laser in situ alloying experiments where Nb, ranging ...Read more
Author:Dada, M; Popoola, P; Mathe, Ntombizodwa R; Adeosun, S; Pityana, Sisa LDate:Sep 2021Using 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