• ICALEO 2008 Paper #1002 (Assessment of Different Laser Hybrid Welding Processes)

    Assessment of Different Laser Hybrid Welding Processes
    Authors:
    Antti Salminen, Lappeenranta University of Technology, Finland; Lappeenranta Finland
    Paul Kah, Lappeenranta University of Technology, Finland; Lappeerenta Finland
    Jukka Martikainen, Lappeenranta University of Technology, Finland; Lappeenranta Finland
    Presented at ICALEO 2008

    The hybrid welding process, which combines two welding processes together (e.g. laser and an arc), has received much consideration in recent years as a high speed, highly competent, excellent quality welding process which recompenses weaknesses of the individual welding processes. A variety of experiments in laser/MIG/MAG hybrid weldin...

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  • ICALEO 2008 Paper #1003 (The Arc in Hybrid Welding Serves As a Sensor for the Process Quality)

    The Arc in Hybrid Welding Serves As a Sensor for the Process Quality
    Authors:
    Uwe Reisgen, Rwth Aachen University, Welding and Joining Institute; Aachen Germany
    Simon Olschok, Rwth Aachen University, Welding and Joining Institute; Aachen Germany
    Stefan Jakobs, Rwth Aachen University, Welding and Joining Institute; Aachen Germany
    Presented at ICALEO 2008

    Laser GMA hybrid welding which has been invented by Bill Steen in the late Seventies of the last century is gaining in importance in the metal-working industry. For this reason, the process is also in the special focus of interest in the fields of research and development. Irregularities in the arc welding process are w...

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  • ICALEO 2008 Paper #1004 (Defects and Process Tolerances in Welding of Thick Plates)

    Defects and Process Tolerances in Welding of Thick Plates
    Authors:
    Frank Vollertsen, BIAS; Bremen Germany
    Stefan Gruenenwald, Bias; Bremen Germany
    Presented at ICALEO 2008

    Laser welding and laser-GMA hybrid welding using an 8 kW fiber laser was investigated. Steel plates from low alloyed steel (e. g. pipeline steel X65) having a thickness of 10 mm up to 20.5 mm were joined under various conditions. Single layer laser welding and laser-GMA hybrid welding as well as multi layer hybrid welding were investigated for different seam preparation types. Butt welds and different types of single-V butt welds with broad root face have been tested. The gap and the edge misalignment have been v...

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  • ICALEO 2008 Paper #1005 (Distribution of Wire Feeding Elements in Laser-arc Hybrid Welding)

    Distribution of Wire Feeding Elements in Laser-arc Hybrid Welding
    Authors:
    Lin Zhao, National Institute for Materials Science; Tsukuba, Ibaraki Japan
    Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
    Tomohiro Sugino, National Institute for Materials Science (Present Address:Ihi); Yokohama Japan
    Goro Arakane, National Institute for Materials Science; Tsukuba, Ibaraki Japan
    Presented at ICALEO 2008

    One of the advantages of the laser-arc hybrid welding is to attain the improved microstructure and mechanical property of the weld metal by feeding filler materials. In this case, the alloying elements should be distributed homoge...

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  • ICALEO 2008 Paper #1006 (Study of Phenomenon of Fibre-Laser-Mig/Mag-Hybrid-Welding)

    Study of Phenomenon of Fibre-Laser-Mig/Mag-Hybrid-Welding
    Authors:
    Heidi Piili, Lappeenranta University of Technology; Lappeenranta Finland
    Antti Salminen, Lappeenranta University of Technology; Lappeenranta Finland
    Petri Harkko, Cavitar Ltd; Tampere Finland
    Janne Lehtinen, Cavitar Ltd; Tampere Finland
    Presented at ICALEO 2008

    The laser hybrid welding processes are widening the field of laser welding applications. They are gaining ever more interest in many sectors of metal industry. There is quite a few successful applications already in use for example in automotive, ship building and construction industry. The current development steps of high power fi...

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  • ICALEO 2008 Paper #101 (Morphological and Thermal Modelling of Direct Metal Deposition: Application to Aeronautical Alloys)

    Morphological and Thermal Modelling of Direct Metal Deposition: Application to Aeronautical Alloys
    Authors:
    Patrice Peyre, Lalp-Gerailp, Upr 1578 Cnrs; Arcueil France
    Pascal Aubry, Gip-Gerailp; Arcueil France
    Ry Fabbro, Lalp-Gerailp, Upr 1578 Cnrs; Arcueil France
    Presented at ICALEO 2008

    Direct metal deposition (DMD) allows to generate complex structures from the interaction between a projected powder and a laser beam, with or without using a coaxial device. One of the main issues to address concerns the prediction of layer widths and heights from the laser and powder parameters, in order to allow thermal or thermo-mechanical modelling in a second step. Indeed, most...

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  • ICALEO 2008 Paper #102 (Novel Computer Generated Diffractive Optics Modifying Beam Characteristics to Improve the Microstructures of Directly Deposited Inconel 625)

    Novel Computer Generated Diffractive Optics Modifying Beam Characteristics to Improve the Microstructures of Directly Deposited Inconel 625
    Authors:
    John Tyrer, Loughborough University; Loughborough Great Britain
    Matthew Gibson, Loughborough University; Loughborough Great Britain
    Rebecca Higginson, Loughborough University; Loughborough Great Britain
    Presented at ICALEO 2008

    A major use of metal additive welding is the repair of damaged or worn turbine blades. Current methods used to produce multiple layer repairs in high nickel content alloys have shown an inability to prevent intergranular cracking and levels of porosity in the deposited material. These problems are c...

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  • ICALEO 2008 Paper #103 (Process Control on Laser Cladding for Direct Manufacturing: Control of the Width and Height of the Deposited Material by Coaxial Vision)

    Process Control on Laser Cladding for Direct Manufacturing: Control of the Width and Height of the Deposited Material by Coaxial Vision
    Authors:
    Mehdi Guiraud, Gerailp; Arcueil France
    Pascal Aubry, CEA / GERAILP; Arcueil France
    Remy Fabbro, Gerailp/Lalp; Arcueil France
    Presented at ICALEO 2008

    In order to generate 3D complex structures by laser cladding, it is necessary to control the width and the height of the deposited material. First, we present a general overview of the problem. The phenomenological model linking the main the process parameters with the output parameters (width and height of the deposited material) is presented. As this model evidences, the proce...

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  • ICALEO 2008 Paper #105 (An Investigation on Porosity in Laser Metal Deposition)

    An Investigation on Porosity in Laser Metal Deposition
    Authors:
    Gary K.L. Ng, Simtech; Singapore Singapore
    Guijun Bi, Simtech; Singapore Singapore
    Hongyu Zheng, Singapore Institute of Manufacturing Technology (Simtech); Singapore Singapore
    Presented at ICALEO 2008

    Laser metal deposition is a process that involves laser processing of fine metal powders into forming three-dimensional structures. Its versatility offers immense opportunities in numerous applications. However, the deposited material using the powder blown process is often plagued by inherent defects such as porosity which cannot be tolerated in certain applications. The origin of the gas porosity observed i...

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  • ICALEO 2008 Paper #106 (Laser-assisted Production of Electrical Discharge Machining (EDM) Electrodes: A Comparative Study between Rapid Prototyping by Selective Laser Sintering and Laser Surface Cladding Techniques)

    Laser-assisted Production of Electrical Discharge Machining (EDM) Electrodes: A Comparative Study between Rapid Prototyping by Selective Laser Sintering and Laser Surface Cladding Techniques
    Authors:
    F. Lusquiños, University of Vigo; Vigo Spain
    R. Comesaña, University De Vigo; Vigo Spain
    J. del Val, University of Vigo; Vigo Spain
    V. Ventosinos, Centro Tecnologico De Automocion De Galicia (Ctag); Porrino Spain
    R. Vázquez, Centro Tecnologico De Automocion De Galicia (Ctag); Porri�O Spain
    A. Riveiro, University of Vigo; Vigo Spain
    F. Quintero, University of Vigo; Vigo Spain
    H. Santísima-Trinidad, Centro Tecnologico De A...

    $28.00

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