• ICALEO 2006 Paper #1302 (High Speed Fiber Laser Welding for Fuel Cell Components)

    High Speed Fiber Laser Welding for Fuel Cell Components
    Authors:
    Stanley Ream, EWI; Columbus OH USA
    Presented at ICALEO 2006

    As energy independence becomes a more pressing concern in the U.S. and other countries, industry and government fuel cell development efforts have gained momentum. There are several leading fuel cell types and hundreds of specific fuel cell designs. Yet, despite the design diversity, there is a common theme that appears in many systems, specifically the need to join, seal, and/or weld thin, stainless steel components at very high production rates. Fuel cell system components such as bi-polar plates, fuel processors, recuperators, and heat exchangers are all comprised o...

    $28.00

  • ICALEO 2006 Paper #1305 (High Average Power, Low Non-linearity Ytterbium Fiber Amplifier using Spectral Compression)

    High Average Power, Low Non-linearity Ytterbium Fiber Amplifier using Spectral Compression
    Authors:
    Yoann Zaouter, Amplitude Systemes; Pessac France
    Eric Cormier, University of Bordeaux; Talence France
    Pierre Rigail, Amplitude Systemes; Pessac France
    Clemens Hoenninger, Amplitude Systemes; Pessac France
    Eric Mottay, Amplitude Systemes; Pessac France
    Presented at ICALEO 2006

    High precision applications, such as micro and nano-machining, waveguide writing, nano-structuring require both moderate energy level, and high average power. We present a high average power fibre amplifier. We report on a Ytterbium doped fiber-based amplifier, delivering u...

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  • ICALEO 2006 Paper #1401 (A Novel Non-Intrusive Technique for CO2 Laser On-line Beam Monitoring)

    A Novel Non-Intrusive Technique for CO2 Laser On-line Beam Monitoring
    Authors:
    Martin Sparkes, The University Of Cambridge; Cambridge Great Britain
    Markus Gross, The University Of Cambridge; Cambridge Great Britain
    Edward Pain, The University Of Cambridge; Cambridge Great Britain
    William O'Neill, The University Of Cambridge; Cambridge Great Britain
    Presented at ICALEO 2006

    The measurement of high speed laser beam parameters during processing is a topic that has seen growing attention over the last few years as quality assurance places greater demand on the monitoring of the manufacturing process. The targets for any monitoring system is to be non intrusiv...

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  • ICALEO 2006 Paper #1402 (Optical Inspection of Laser Drilled Cooling Holes in Jet Engine Blades)

    Optical Inspection of Laser Drilled Cooling Holes in Jet Engine Blades
    Authors:
    Devdas Shetty, University of Hartford; West Hartford CT USA
    Nikolai Nazaryan, University of Hartford; West Hartford CT USA
    Tom Eppes, University of Hartford; West Hartford CT USA
    Claudio Campana, University of Hartford; West Hartford CT USA
    Jun Kondo, University of Hartford; West Hartford CT USA
    Presented at ICALEO 2006

    The need for improved engine efficiency of jet engines has led to changes in the design of combustor turbine blades. To combat and avert turbine blade failure caused by excessive operating temperatures, film cooling has been incorporated into blade ...

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  • ICALEO 2006 Paper #1403 (Sensing and Experimental Based Modeling of Direct Metal Deposition)

    Sensing and Experimental Based Modeling of Direct Metal Deposition
    Authors:
    Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
    Lijun Song, University of Michigan; Ann Arbor MI USA
    Presented at ICALEO 2006

    This paper presents an experimental investigation on the process dynamics of direct metal deposition. An optical sensing system, including three couple charged device cameras and a two-color pyrometer, is used to monitor molten pool geometry and pool temperature during the deposition process. Molten pool area size and height are obtained by image processing. Auto regressive exogenous models and state space models are implemented to identify the direct metal deposition proces...

    $28.00

  • ICALEO 2006 Paper #1404 (Camera Based Feedback Control of the Laser Cladding Process)

    Camera Based Feedback Control of the Laser Cladding Process
    Authors:
    Johannes Hofman, University of Twente; Enschede Netherlands
    D.F. de Lange, Netherlands Institute for Metals Research; Enschede Netherlands
    J. Meijer, University of Twente; Netherlands
    Presented at ICALEO 2006

    A camera based feedback controller is designed and implemented to optimize the energy input during the process. This controller eliminates the need and effort to experimentally optimize the process. Moreover this controller automatically determines the required energy input to meet a well-defined criterion for a wide range of speeds, powder mass rates and material combinations. Also, it correct...

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  • ICALEO 2006 Paper #1405 (In Situ Evaluation of Metallic Coatings via Laser Plasma Spectroscopy)

    In Situ Evaluation of Metallic Coatings via Laser Plasma Spectroscopy
    Authors:
    Bhupendra Gupta, GE Infrastructure - Aviation; Cincinnati OH USA
    Pamela Benicewicz, GE Global Research; Niskayuna NY USA
    Presented at ICALEO 2006

    We present a method and apparatus that provides in situ, near real-time evaluation of metallic coatings used as protective barriers for various industrial applications. Identification of the elemental constituents of the coating and substrate is accomplished using the technique of laser plasma spectroscopy, whereby optical emissions from the plasma formed by focusing a high energy pulsed laser onto a part coating or substrate surface uniquely identify the elem...

    $28.00

  • ICALEO 2006 Paper #1501 (Microstructure and Mechanical Properties of Laser-Deposited Ti-6Al-4V Scaffold)

    Microstructure and Mechanical Properties of Laser-Deposited Ti-6Al-4V Scaffold
    Authors:
    Guru Dinda, University of Michigan; Ann Arbor MI USA
    Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
    Lijun Song, University of Michigan; Ann Arbor MI USA
    Presented at ICALEO 2006

    Direct laser deposition is a rapid prototyping method which can be used to manufacture near net shape components using powders from their CAD files in one step. The aim of the present work is to produce ideal Ti-6Al-4V scaffold (a supporting structure for growing cells and tissues) using direct laser deposition technique and to study the microstructure and mechanical properties for its applicabilit...

    $28.00

  • ICALEO 2006 Paper #1503 (Production of Biofibers by Laser Spinning)

    Production of Biofibers by Laser Spinning
    Authors:
    Antonio Riveiro, Universidade de Vigo; Vigo Spain
    Felix Quintero, Universidade de Vigo; Vigo Spain
    Juan Pou, Universidade de Vigo; Vigo Spain
    Adrian Mann, Rutgers State University; Piscataway NJ USA
    Fernando Lusquiños, Universidade de Vigo; Vigo Spain
    Presented at ICALEO 2006

    A new technique called laser spinning is presented in this work. This technique was employed for the synthesis of bioactive fibres. The technique is based in the laser melting of a glass plate under atmospheric conditions at room temperature. A high pressure gas jet is employed to assist the process. The glass plate was ...

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  • ICALEO 2006 Paper #1504 (Plasma Spray Hydroxyapatite Coating on Laser Surface Nitrided Ti6Al4V Alloy)

    Plasma Spray Hydroxyapatite Coating on Laser Surface Nitrided Ti6Al4V Alloy
    Authors:
    Hau Chung Man, Hong Kong Polytechnic University; Hung Hom, Kowloon Hong Kong
    Sen Yang, Hong Kong Polytechnic University; Hong Kong
    Xuebin Zheng, Shanghai Institute of Ceramics; Peoples Republic of China
    Presented at ICALEO 2006

    To accelerate the bone growth around a metallic implant, a layer of bioactive ceramic such as hydroxyapatite (HA) can be applied as a coating on the metal implant. One of the critical factors for successful implantation is that the HA coating must have strong adherence to the metal substrate at the interface. Many coating techniques have been developed over ...

    $28.00

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