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Browsing by Author "Burger, HP"

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Comparison of CO2 and Nd:YAG laser welding of grade 250 maraging steel, IIW doc. II-A-173-06

Author: Van Rooyen, Corney ; Burger, HP ; Kazadi, BP Date: Nov 2006 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 produced utilising a 5 ... Read more
Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum

Author: Theron, Maritha ; Knutsen, RD ; Ivanchev, LH ; Burger, HP Date: Feb 2012 Semi-solid metal rheo-cast F357 aluminum plates were joined by autogenous Nd:YAG laser welding and were welded in either the as-cast (F) condition, T4 temper or T6 temper condition. The weldability of this age-hardenable Al–7%Si–0.6%Mg casting ... Read more
Effect of Pre/Post T6 Heat Treatment on the Mechanical Properties of Laser Welded SSM Cast A356 Aluminium Alloy

Author: Akhter, R ; Ivanchev, L ; Burger, HP Date: Feb 2007 Aluminium alloy A356 was treated by the Rheo semi solid metal (SSM) process, developed recently by CSIR-Pretoria, and cast in plates using a high pressure die casting (HPDC) machine. Plates in as cast condition (F) and heat treated T6 condition ... Read more
Enhancing the competitiveness of an SMME in the automotive industry through the introduction of laser based manufacturing. A case study

Author: Burger, HP ; Klopper, W Date: 2006 The Automotive Industry uses large volumes of woven synthetic cloth in their paint shops. The cloth is used to clean the car bodies prior to painting. A basic requirement for this application is that the cloth is lint free to avoid blemishes ... Read more
Influence of heat treatments for laser welded semi solid metal cast A356 alloy on the fracture mode of tensile specimens

Author: Kunene, G ; Govender, G ; Ivanchev, LH ; Knutsen, R ; Burger, HP Date: Sep 2008 The CSIR rheo-process was used to prepare the aluminium A356 SSM slurries and thereafter plates (4x80x100 mm3) were cast using a 50 Ton Edgewick HPDC machine. Plates in the as cast, T4 and T6 heat treatment conditions which had passed radiography ... Read more
Laser enabled refurbishment and performance enhancement of industrial components

Author: Van Rooyen, Corney ; Theron, Maritha ; Burger, HP Date: Sep 2011 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 techno-economically viable ... Read more
Laser welding of SSM Cast A356 aluminium alloy processed with CSIR-Rheo technology

Author: Akhter, R ; Ivanchev, L ; Van Rooyen, Corney ; Kazadi, BP ; Burger, HP Date: 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 microstructure were ... Read more
Microstructure of laser cladded martensitic stainless steel

Author: Van Rooyen, Corney ; Burger, HP ; Kazadi, BP Date: Aug 2006 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 laser cladded ... Read more

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Browsing by Author "Burger, HP"

Browsing by Author "Burger, HP"

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