• ICALEO 2007 Paper #1706 (Laser Cladding of Al-Si/Sic Composite Coatings: Microstructure and Abrasive Wear Behavior)

    Laser Cladding of Al-Si/Sic Composite Coatings: Microstructure and Abrasive Wear Behavior
    Authors:
    Ramasamy Anandkumar, Instituto Superior Tecnico; Lisboa Portugal
    Amelia Almeida, Instituto Superior Tecnico; Lisbon Portugal
    Rui Vilar, Instituto Superior Tecnico; Lisboa Portugal
    Vaclav Ocelik, University of Groningen; Groningen Netherlands
    Jeff De Hosson, University of Groningen; Groningen Netherlands
    Presented at ICALEO 2007

    Coatings of a composite material consisting of an Al-Si matrix reinforced with SiC particles were produced by laser cladding on cast UNS 356 alloy substrates. The influence of processing parameters on the microstructure an...

    $28.00

  • ICALEO 2007 Paper #1707 (Deposition Efficiencies of Laser Cladding with Various Sources)

    Deposition Efficiencies of Laser Cladding with Various Sources
    Authors:
    J.F. Tressler, ARL, The Penn State University; University Park PA USA
    Richard Martukanitz, ARL, The Penn State University; State College PA USA
    J.H. McDermott, ARL, The Penn State University; University Park PA USA
    Presented at ICALEO 2007

    This presentation will encompass the results of evaluations on laser cladding experiments measuring deposition rates and energy efficiency for various laser systems. With The ability to efficiency deposit material, regardless of the process, is of extreme importance for many cladding applications. To quantify the efficiency of laser cladding, CO2, Nd:YAG (flas...

    $28.00

  • ICALEO 2007 Paper #1708 (A Study of Optimal Laser Parameters by ANOVA Method in Laser Surface Alloyed NiTi with Mo)

    A Study of Optimal Laser Parameters by ANOVA Method in Laser Surface Alloyed NiTi with Mo
    Authors:
    H.C. Man, The Hong Kong Polytechnic University; Kowloon Hong Kong
    Ng Ka Wai, The Hong Kong Polytechnic University; Shatin Hong Kong
    T.M. Yue, The Hong Kong Polytechnic University; Kowloon Hong Kong
    Presented at ICALEO 2007

    The present work investigates the influence of process parameters for laser surface alloying with molybdenum on Nickel Titanium, which is extensively used in medical devices industries. A systematic study of process parameters such as laser power, scanning velocity and pre-paste thickness upon the Mo concentration was carried out. Analysis of variance (...

    $28.00

  • ICALEO 2007 Paper #1801 (Simulation Based Design of Hybrid Laser Welding Processes)

    Simulation Based Design of Hybrid Laser Welding Processes
    Authors:
    Dave Farson, Ohio State University; Columbus OH USA
    MinHyun Cho, OSU; Columbus OH USA
    YongChae Lim, OSU; Columbus OH USA
    Presented at ICALEO 2007

    In this presentation, development of innovative configurations of the hybrid laser + GMA welding process for fatigue-critical welds, high-speed welding and narrow gap welding are described. Fatigue strength, which is often of concern in fabricated steel structures, is strongly related to the final weld shape in the weld toe region. For fatigue critical welding, the hybrid laser beam focus spot was larger than normal (to prevent keyhole formation) and was loca...

    $28.00

  • ICALEO 2007 Paper #1803 (Laser Absorption within a Powder Layer and the Numerical Modeling of Heat Transfer during the Laser Cladding Process)

    Laser Absorption within a Powder Layer and the Numerical Modeling of Heat Transfer during the Laser Cladding Process
    Authors:
    Ryan McVey, Engineering Science and Mechanics Department, The Penn State University; State College PA USA
    Richard Martukanitz, ARL, The Penn State University; State College PA USA
    Shawn Kelly, ARL, The Penn State University; State College PA USA
    Presented at ICALEO 2007

    In previous experimentation, it has been shown that laser energy incident onto a powder layer is absorbed within the layer; however, when modeling a powder based laser deposition process, it is common practice to assume surface loading only. The current work explores incorporati...

    $28.00

  • ICALEO 2007 Paper #1804 (Nd:Yag Laser Absorptance of Rough Metal Surfaces)

    Nd:Yag Laser Absorptance of Rough Metal Surfaces
    Authors:
    David Bergstrom, Mid Sweden University; Ostersund Sweden
    John Powell, Laser Expertise Ltd.; Nottingham Great Britain
    Alexander F. H. Kaplan, Lulea University of Technology; Lulea Sweden
    Presented at ICALEO 2007

    The Nd:YLF/Nd:YAG laser absorptance of rough metal surfaces has been investigated using 3D ray tracing simulations on computer-generated Gaussian random rough metal surfaces. The impact of multiple scattering, shadowing and Fresnel-equation based angle dependence on the overall absorption is discussed.

    $28.00

  • ICALEO 2007 Paper #1805 (Modeling and Simulation of the Energy Deposition in Laser Beam Welding with Oscillatory Beam Deflection)

    Modeling and Simulation of the Energy Deposition in Laser Beam Welding with Oscillatory Beam Deflection
    Authors:
    Achim Mahrle, TU Dresden / IOF - LOT; Dresden Germany
    Eckhard Beyer, IWS Dresden / TU Dresden; Dresden Germany
    Presented at ICALEO 2007

    In recent years, some promising results about laser beam welding with forced beam oscillation were published. Characteristic feature of this technology is the purposeful beam manipulation by an oscillatory beam deflection in superposition to the commonly uniform and rectilinear feed rate of a conventional laser beam welding process. Due to the increased number of welding variables, the application of oscillation techniques offers manifol...

    $28.00

  • ICALEO 2007 Paper #1806 (A Verified Model of Laser Direct Metal Deposition using an Analytical Enthalpy Balance Method)

    A Verified Model of Laser Direct Metal Deposition using an Analytical Enthalpy Balance Method
    Authors:
    Andrew Pinkerton, The University of Manchester; Manchester Great Britain
    Kamran Shah, The University of Manchester; Manchester Great Britain
    Richard Moat, The University of Manchester; Manchester Great Britain
    Lin Li, The University of Manchester; Manchester Great Britain
    Michael Preuss, The University of Manchester; Manchester Great Britain
    Philip Withers, The University of Manchester; Manchester Great Britain
    Presented at ICALEO 2007

    Analytical modelling of a quasi-stationary laser melt pool without mass addition can be achieve...

    $28.00

  • ICALEO 2007 Paper #1808 (A Coupled Time-Dependent Numerical Simulation on Temperature and Stress Fields in Laser Solid Freeform Fabrication Process)

    A Coupled Time-Dependent Numerical Simulation on Temperature and Stress Fields in Laser Solid Freeform Fabrication Process
    Authors:
    Masoud Alimardani, Department of Mechanical and Mechatronics Engineering, University of Waterloo; Waterloo ON Canada
    Ehsan Toyserkani, Department of Mechanical and Mechatronics Engineering, University of Waterloo; Waterloo ON Canada
    Jan P. Huissoon, Department of Mechanical and Mechatronics Engineering, University of Waterloo; Waterloo ON Canada
    Presented at ICALEO 2007

    This paper presents a coupled 3D time-dependent numerical approach for modeling laser solid freeform fabrication by which the geometry of the deposited materials, temperatu...

    $28.00

  • ICALEO 2007 Paper #1901 (Perimetric Sensor for the Detection and Following of Complex Seam Trajectories in Robotic Laser Welding)

    Perimetric Sensor for the Detection and Following of Complex Seam Trajectories in Robotic Laser Welding
    Authors:
    Dimitrios Iakovou, University of Twente; Enschede Netherlands
    Johan Meijer, University of Twente; Enschede Netherlands
    Ronald Aarts, Univercity of Twente; Enschede Netherlands
    Ben Jonker, University of Twente; Enschede Netherlands
    Presented at ICALEO 2007

    The use of robotic laser welding is increasing among industrial applications, because of its ability to weld objects in three dimensions. Automatic seam detection and following can be accomplished with the aid of seam detection sensors. The majority of the available sensors apply optical triang...

    $28.00

Pages

help desk software

Pages