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Browsing by Author "Van Rooyen, C"

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  • Van Rooyen, C; Burger, HP; Kazadi, BP (2006-11)
    Laser welding trials were performed on thin walled cylindrical Grade 250 maraging steel tubes to determine its suitability as a joining process for rocket motor casings. Bead-on-plate (BOP) and butt welded samples were ...
  • Theron, M; Van Rooyen, C; Ivanchev, LH (ICALEO - International Congress on Applications of Lasers & Electro-Optics, 2007-10)
    A 4kW CW Nd:YAG laser was used for lap welding of three different dissimilar sheet metal combinations, namely 316L S/S - Ti64, 316L S/S - Al 5251 and Al 1200 – Cu (99.85%). A welding matrix of laser power, travel speed and ...
  • Van Rooyen, C; Burger, H; Theron, M; Doubell, P (CSIR, 2010-09)
    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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Van Rooyen, C (2009-11)
    This 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 ...
  • Akhter, R; Ivanchev, L; Van Rooyen, C; Kazadi, BP; Burger, HP (Trans Tech Publications Ltd, 2006)
    Samples of aluminium alloy A356 were manufactured by Semi Solid Metals HPDC technology, developed recently in CSIR, Pretoria. They were butt welded in as cast conditions using as Nd: YAG laser. The best metal and weld ...
  • Van Rooyen, C (2007-07)
    Heat input plays an important role in the microstructural development of 12%Cr martensitic stainless steel. The microstructure of low-C 12%Cr martensitic stainless steel resulting from laser cladding was investigated. For ...
  • Van Rooyen, C; Burger, HP; Kazadi, BP (2006-08)
    Laser cladding offers distinct advantages including low dilution, low heat input,less distortion, increased mechanical and corrosion properties excellent repeatability and control of process parameters. Solidification of ...
  • Makamo, N; Van Rooyen, C; Venter, Karien (2015-07)
    Freight transportation is one of the major contributors to economic development in a country. During a recent study, it was found that little information is available in terms of the cost of crashes to the environment. ...