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  • ICALEO 2007 Paper #1703 (Experimental Investigation of Residual Stresses Generated during Laser Cladding)

    Experimental Investigation of Residual Stresses Generated during Laser Cladding
    Authors:
    B Pathiraj, University of Twente; Enschede Netherlands
    Johannes Hofman, Netherlands Institute for Metals Research; Enschede Netherlands
    J Meijer, University of Twente; Enschede Netherlands
    Presented at ICALEO 2007

    Residual stresses are an important parameter in the process optimization of laser cladding. An important parameter in the process optimization is the residual stresses. These stresses are caused by high thermal gradients and therefore differential thermal contractions are present, as well as the different thermo mechanical properties of the joined materials. An experiment...

    $28.00

  • ICALEO 2007 Paper #1702 (Hot-wire Cladding Process Studies)

    Hot-wire Cladding Process Studies
    Authors:
    Janne Nurminen, Technology Centre Ketek Oy; Kokkola Finland
    Jouko Riihimaki, Technology Centre Ketek Oy; Kokkola Finland
    Jonne Nakki, Technology Centre Ketek Oy; Kokkola Finland
    Petri Vuoristo, Technology Centre Ketek Oy, Tampere University of Technology; Kokkola Finland
    Presented at ICALEO 2007

    Hot-wire laser cladding is a coating method with excellent properties and high deposition rate. Process is rather simple and fundamental relationships of basic parameters like laser power, amperage, voltage, travel speed and spot sizehave been studied experimentally. Solid wires are easily melted by the melt pool generated...

    $28.00

  • ICALEO 2007 Paper #1701 (Precipitating Behavior of In Situ Synthesized Multiple Carbide Particles in Laser Cladded MMC Coating)

    Precipitating Behavior of In Situ Synthesized Multiple Carbide Particles in Laser Cladded MMC Coating
    Authors:
    Chaofeng Wu, Tsinghua Univ.; Beijing Peoples Republic of China
    Mingxing Ma, Tsinghua University; Beijing Peoples Republic of China
    Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
    Wenjin Liu, Tsinghua Univ.; Beijing Peoples Republic of China
    Weiming Zhang, Tsinghua University; Beijing Peoples Republic of China
    Hongjun Zhang, Tsinghua University; Beijing Peoples Republic of China
    Presented at ICALEO 2007

    Metal matrix composite (MMC) has attracted extensive investigation in material science and engineeri...

    $28.00

  • ICALEO 2007 Paper #1609 (Zinc Sulfide Optics for High Power Laser Applications)

    Zinc Sulfide Optics for High Power Laser Applications
    Authors:
    Stanley Ream, EWI; Columbus OH USA
    Wei Zhang, EWI; Columbus OH USA
    Craig Walters, CWA; Dublin OH USA
    Greg Firestone, EWI; Columbus OH USA
    Presented at ICALEO 2007

    As higher power disc and fiber lasers become available, questions arise concerning the stability and durability of focusing optics. Even at familiar YAG power and brightness (i.e. 4 kW from 600 um fiber) focusing optics are known to exhibit shifts in position and changes in focal spot size. At higher power levels these focusing issues will become significantly more troublesome. Traditional 1.06/1.07 um focusing optics are construc...

    $28.00

  • ICALEO 2007 Paper #1608 (Fibre Laser GMA Hybrid Welding of Thin Sheet Material)

    Fibre Laser GMA Hybrid Welding of Thin Sheet Material
    Authors:
    Claus Thomy, BIAS; Hambergen Germany
    Frank Vollertsen, BIAS; Germany
    Thomas Seefeld, BIAS; Bremen Germany
    Presented at ICALEO 2007

    In order to restrain heat input and increase productivity in thin steel sheet welding compared to arc and laser welding processes, a laser GMA hybrid welding process with single-mode fibre laser was developed. The effects of some basic parameters such as laser power, focal position and laser arc distance were investigated and discussed in view of weld quality and process efficiency. Moreover, the influence of gap on weld quality, hardness and static strength was considered. Ba...

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  • ICALEO 2007 Paper #1607 (Welding of Ti-6Al-4V with Fibre Delivered Laser Beams)

    Welding of Ti-6Al-4V with Fibre Delivered Laser Beams
    Authors:
    Paul Hilton, TWI Ltd.; Great Abington, Cambridge Great Britain
    Jonathan Blackburn, Laser Processing Research Centre, The University of Manchester; Manchester Great Britain
    Pak Chong, Welding and Materials; Aberdeen Great Britain
    Presented at ICALEO 2007

    Titanium alloys offer higher strength to weight ratios than steels, better fatigue performance than aluminium alloys and better corrosion resistance than aluminium alloys and stainless steels and are now increasingly used in applications in the aerospace, chemical plant, power generation, oil and gas, medical and sporting goods sectors. For aerospace applica...

    $28.00

  • ICALEO 2007 Paper #1606 (Laser Alloying of Aluminum using a Deep Penetration Process with Fiber Laser)

    Laser Alloying of Aluminum using a Deep Penetration Process with Fiber Laser
    Authors:
    Knut Partes, BIAS; Bremen Germany
    Frank Vollertsen, BIAS; Bremen Germany
    G. Habedank,, BIAS; Bremen Germany
    Thomas Seefeld, BIAS; Bremen Germany
    Presented at ICALEO 2007

    Today laser alloying of Aluminum is a well known technique in order to increase the wear resistance of parts. The process is typically limited in depth to about 1 mm. In this study it is shown that a deeper alloying is possible by using the deep penetration effect caused by a highly intensive laser beam. The laser beam is scanned in a circular motion in order to control the track profile. By this manner o...

    $28.00

  • ICALEO 2007 Paper #1604 (Study of the Phenomena of Fiber Laser-MAG Hybrid Welding)

    Study of the Phenomena of Fiber Laser-MAG Hybrid Welding
    Authors:
    Anna Fellman, Lappeenranta Univ. of Technology; Lappeenranta Finland
    Antti Salminen, Lappeenranta Univ. of Technology; Lappeenranta Finland
    Presented at ICALEO 2007

    Laser hybrid welding processes are gaining more interest in many sectors of metal industry. The process is already in successful use for example in automotive, ship building and construction industry. The laser hybrid welding processes are traditionally a combination of CO2 or Nd:YAG laser together with MIG/MAG or TIG welding. The arc welding source is chosen depending on whether there is also need for extra material. The maximum powers available for thes...

    $28.00

  • ICALEO 2007 Paper #1603 (High Performance Industrial Disk Lasers for a Broad Range of Applications)

    High Performance Industrial Disk Lasers for a Broad Range of Applications
    Authors:
    Holger Schlueter, Trumpf Inc.; Farmington CT USA
    Kurt Mann, Trumpf Laser GmbH; Schramberg Germany
    Ruediger Brockmann, Trumpf Laser GmbH; Schramberg Germany
    David Havrilla, Trumpf Inc.; Farmington CT USA
    Presented at ICALEO 2007

    Laser welding has become one of the most expanding areas for industrial laser applications. The increasing cost effectiveness of the laser process is accompanied by the development of new high efficient laser sources, such as the new disk laser. TRUMPF introduced the disk laser several years ago, and today it has become the most reliable laser tool on...

    $28.00

  • ICALEO 2007 Paper #1602 (Influence of Inclination Angle on Spatter Behavior at Welding with Lasers of Strong Focusability)

    Influence of Inclination Angle on Spatter Behavior at Welding with Lasers of Strong Focusability
    Authors:
    Jan Weberpals, TGSW; Stuttgart Germany
    Friedrich Dausinger, FGSW; Stuttgart Germany
    Presented at ICALEO 2007

    Thin disk lasers as well as fiber lasers are distinguished by their strong focusability and high efficiency. The stronger focusability can be used for an expansion of the application range. Weld seams of unprecedented high aspect ratios independent of the laser type can be achieved which are only known from the electron beam welding until now. Based on results of thin disk and fiber laser experiments it has been shown in earlier publications that the influence of the div...

    $28.00

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