Author:Phume, L; Pityana, Sisa L; Meacock, C; Popoola, APIDate:Dec 2012The objectives of this study were to investigate laser surface coating of Ti6Al4V with preplaced Hafnium powder, and to determine the influence of the energy density on the characteristics of bonding and the microstructure.Read more
Author:Baloyi, N; Tlotleng, Monnamme; Meacock, Christopher; Pityana, Sisa L; Majumdar, JDDate:Nov 2012Laser coating is an advanced coating technology for improving the surface properties of various components. These coatings are extremely dense, crack-free and have non-porous microstructures. Coatings archived by laser based coating technology ...Read morecb
Author:Botha, L; Du Plessis, A; Uys, H; de Clercq, LDate:01 Sep 2010Coherent control of quantum dynamics in optical, molecular and biological systems is a rapidly advancing field with many possible applications. This field of study was originally motivated by the goal of steering photoreactions into specific ...Read more
Author:Esser, DDate:Oct 2012In this presentation the development path of new solid-state laser technology, which is taken from the underlying laser physics to challenging real world applications, is shown.Read more
Author:Van Rooyen, Corney; Theron, Maritha; Burger, HPDate:Sep 2011This presentation highlights the case for refurbishment/performance enhancement of industrial components in South Africa. There is potential to improve operational efficiency and reduce operating cost provided that techno-economically viable ...Read more
Author:Labuschagne, K; Pityana, Sisa LDate:Jul 2005In view of the importance of material degradation during laser irradiation, which can have deleterious effects on mechanical and chemical properties of a component, a study was initiated to determine a threshold at which damage takes place ...Read more
Author:Mahamood, RM; Akinlabi, ET; Shukla, M; Pityana, Sisa LDate:Mar 2013The effect of laser power on the resulting microstructure and microhardness of laser metal deposited Ti6Al4V powder on Ti6Al4V substrate has been investigated. The tracks were deposited using 99.6 % pure Ti6Al4V powder of particle size ranging ...Read more
Author:Popoola, AP; Pityana, Sisa LDate:Oct 2010The present work deals with the development of Aluminium metal matrix composite (MMC) using TiB2 reinforcement. The aim is to improve the microhardness property of the substrate. The surface of the aluminium was sand blasted to improve its ...Read more
Author:Chakraborty, A; Pityana, Sisa L; Dutta Majumdar, JDate:Jan 2017The present investigation aims at improving the wear resistance of AISI 304 stainless steel by laser surface alloying of AISI 304 stainless steel with WC+Co+NiCr (in the weight ratio of 20:40:40). Laser surface alloying was carried out by ...Read more
Author:Seleka, TS; Pityana, Sisa LDate:Nov 2006Laser surface melting has been conducted on a 304 stainless steel (SS) with the aim of enhancing pitting corrosion resistance of the material. This process involves rapid melting of the material’s surface followed by rapid solidification to ...Read more
Author:Van Rooyen, CorneyDate:Nov 2009This presentation looks at the experimental procedure and results of laser welding of maraging steel rocker motor casing. It concludes that a fracture occurred in weld metal of autogenous welding and that a fracture occurred in base material ...Read more
Author:Tlotleng, Monnamme; Sukla, M; Akinlabi, E; Pityana, Sisa LDate:Aug 2013This research work seeks to establish titanium alloys (Ti-6Al-4V), in the field of tissue engineering, as material of interest for bone replacement with a particular focus on hip implants replacement. The aim of this study was to produce a ...Read more
Author:Kumar, S; Pityana, Sisa LDate:Nov 2010For making metallic products through Additive Manufacturing (AM) processes, laser-based systems play very significant roles. Laser-based processes such as Selective Laser Melting (SLM) and Laser Engineered Net Shaping (LENS) are dominating ...Read more
Author:Anochie-Boateng, Joseph; Komba, Julius J; O'Connell, Johannes SDate:Jul 2011There are concerns about the standard methods/procedures for quantifying shape properties of rock aggregates used in road and airfield pavements. The CSIR has recently acquired a portable three-dimensional (3D) laser scanning device to address ...Read more
Author:Burke, Michael GDate:Nov 2010The reliable detection and tracking of general objects is required by many field robotics applications, where autonomous agents need to navigate between and interact with dynamic targets in unstructured environments. This paper presents an ...Read more
Author:Ambushe, AA; Du Plessis, A; McCrindle, RIDate:Sep 2010Laser-induced breakdown spectroscopy (LIBS) will be used to determine the contents of heavy metals in soils and sediments. LIBS results will be compared with the results obtained by inductively coupled plasma-optical emission spectrometry ...Read more
Author:Nkoana, R; Engelbrecht, FA; Marean, CWDate:Sep 2015Reconstructing the glacial maximum climates of the Cape south coast region of South Africa is important within the context of understanding the evolution of modern humans in this region. Simulating the Last Glacial Maximum (LGM) climate was ...Read more
Author:Makinana, S; Khanyile, PN; Khutlang, RethabileDate:Sep 2016In crime investigation, fingerprint identification plays a major role in identifying culprits. However, traditional procedure of acquiring latent fingerprint tends to be destructive and leads to a limitation of not being able to do further ...Read more