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  • Mabhali, Luyolo AB; Pityana, SL; Sacks, N (Microscopy Society of Southern Africa (MSSA), 2010-07)
    Aluminium is vastly used in industry due to its low cost, light weight and excellent workability, but lacks in wear resistance and hardness. Laser alloying is used to improve the surface properties such as hardness by ...
  • Tlotleng, Monnamme; Olakanmi, EO; Meacock, C; Pityana, S; Akinlabi, ET; Shukla, M; Doyoyo, M (2012-12)
    A newly acquired, in-house assembled laser assisted cold spraying coating technique had to be commissioned for use in future for metal coating for different industrial application which include, but not limited to chemical ...
  • Kazadi, P; Van Rooyen, C; Burger, H (2006-03)
    Laser refurbishment capabilities were demonstrated and promising results were obtained for repair of distance sleeves, foot rolls, descaler cassette, idler rolls. Based on the cost projections and the results of the in-situ ...
  • Forbes, A; Schulze, C; Flamm, D; Dudley, Angela L; Duparre, M (Optical Society of America, 2013-04)
    We show how laser beam characterization may be done in real-time with digital holograms. We illustrate the power of the techniques by applying them to a variety of laser sources, from fibers to solid-state.
  • Forbes, A (2006-08)
    Many analytical techniques exist to explore the propagation of certain laser beams in free space, or in a linearly absorbing medium. When the medium is nonlinearly absorbing the propagation must be described by an iterative ...
  • Masina, BN; Bodkin, R; Mwakikunga, B; Forbes, A (SPIE, 2011-08)
    This paper presents an implementation of a laser beam shaping system for both heating a diamond tool and measuring the resulting temperature optically. The influence the initial laser parameters have on the resultant ...
  • Litvin, IA; Burger, L; De Gama, MP; Mathye, A; Forbes, A (International Society for Optical Engineering (SPIE)., 2007-09)
    Recent approaches to demonstrating adaptive optics and atmospheric turbulence have made use of spatial light modulators (SLMs) as the active phase element. However, there are limitations in using SLMs as an accurate method ...
  • Forbes, A; Lizotte, TE (SPIE, 2012-09)
    Full content of the proceedings of the Laser Beam Shaping XIII conference held in San Diego, California, United States.
  • Van Rooyen, C; Burger, H; Theron, M (2009-06)
    Laser cladding crack repair of austenitic stainless steel vessels subjected to internal water pressure was evaluated. The purpose of this investigation was to develop process parameters for in-situ repair of through-wall ...
  • Kumar, S; Pityana, S (2010-03)
    Modification of Aluminium surface by injecting, dispersing and melting TiB2 powder with the help of a laser beam promises to enhance tribological properties of Aluminium. The present work consists of making single lines ...
  • Lengopeng, T; Botes, A; Popoola, API (RAPDASA, 2014-11)
    This paper evaluates the effect of process parameters (laser power and scanning velocity) on clad layer height, heat affected zone (HAZ) width, metallurgical bonding to base metal and Vickers microhardness profiles of clad ...
  • Phume, L; Pityana, SL; Meacock, C; Popoola, API (2012-12)
    The 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.
  • Baloyi, N; Tlotleng, Monname; Meacock, Christopher; Pityana, Sisa; Majumdar, JD (Rapid Product Development Association of South Africa (RAPDASA), 2012-11)
    Laser 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 ...
  • Baloyi, NM; Popoola, API; Pityana, SL (South African Institute for Industrial Engineering (SAIIE), 2014-05)
    Coating is a technology for improving the surface properties of components. Laser coating produces uniform composition with thickened layers that display a good metallurgical bond to the base material. These coatings are ...
  • Botha, L; Du Plessis, A; Uys, H; de Clercq, L (CSIR, 2010-09-01)
    Coherent 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 ...
  • Popoola, API; Pityana, SL; Popoola, OM (Electrochemical Science Group, 2011-10)
    Poor corrosion performance of aluminium alloys in marine environment has been a subject of intensive research recently. Aluminium substrate was alloyed with a combination of two metallic powders (Cu + Mo) using an Nd: YAG ...
  • Esser, D (2012-10)
    In 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.
  • Van Rooyen, C; Theron, M; Burger, HP (2011-09)
    This 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 ...
  • Labuschagne, K; Pityana, SL (2005-07)
    In 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 ...
  • Lugongolo, Masixole Y; Manoto, Sello L; Ombinda-Lemboumba, Saturnin; Mthunzi-Kufa, Patience (Optical Society of America (OSA), 2016-10)
    HIV-1 epidemic remains a major health challenge. This study explores the effects of low level laser therapy on HIV-1 infected cells. Infection is reduced by irradiation and the mechanism needs to be investigated further.