Author:Lekoadi, Paul M; Tlotleng, Monnamme; Masina, Bathusile NDate:Dec 2021This work investigated the influence of heating temperature (°C) on the microstructure and microhardness of TiB/Ti6Al4V-ELI composite clads that were produced via in-situ alloying using laser metal deposition technique. The samples were ...Read more
Author:Dada, M; Popoola, P; Mathe, Ntombizodwa R; Pityana, Sisa L; Adeosun, SDate:Sep 2022In 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
Author:Tsoeunyane, GM; Mathe, Ntombizodwa R; Tshabalala, Lerato C; Makhatha, MEDate:May 2022The reduction of surface roughness on additively manufactured components has become a critical factor in engineering applications. This paper reports the electropolishing of additively manufactured Ti-6Al-4V by powder bed selective laser ...Read more
Author:Ramulifho, RD; Gupta, K; Glaser, DanielDate:Sep 2022Additive Manufacturing (AM) of titanium (Ti6Al4V) material using Selective Laser Melting (SLM) may generate significant residual stresses of a tensile nature, which can cause premature component failure. The Aeroswift platform is a large ...Read morecbna
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:Davoren, B; Sacks, N; Theron, MarithaDate:Nov 2021The interest in additive manufacturing and its unique applications has increased significantly over recent years. This has resulted in the need for alloys and composites to be optimized for these processes. In this study a multiphase parameter ...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:Maodzeka, DK; Olakanmi, EO; Mosalagae, M; Hagedorn-Hansen, D; Pityana, Sisa LDate:Aug 2022Improper selection of laser powder bed fusion (LPBF) process parameters tends to result in poor quality parts which imposes limitations with respect to the mechanical performance due to process induced defects. To address this LPBF processing ...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:Skhosane, Besabakhe S; Masina, Bathusile N; Lekoadi, Paul M; Pityane, Sisa LDate:Nov 2022Metal Matrix Composite (MMC) coatings of Tungsten Carbide (WC) and Nickel (Ni) powder were produced using laser cladding process. A crack free and good metallurgically bonded WC-Ni coating of about 5mm thick produced from varying both laser ...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