• ICALEO 2005 Paper #1602 (Improvement of IGC Resistance of SUS 304 Stainless Steel by Laser Surface Melting Based on Grain Boundary Engineering)

    Improvement of IGC Resistance of SUS 304 Stainless Steel by Laser Surface Melting Based on Grain Boundary Engineering
    Authors:
    Sen Yang, Inner Mongolia University of Technology; Hohhot Peoples Republic of China
    Presented at ICALEO 2005

    In order to improve the intergranular corrosion resistance of 304 stainless steels, laser surface melting was conducted on commercial 304 stainless steel, and the microstructure evolution and GBCD (grain boundary character distribution) were investigated. Experimental results showed that the fraction of low S CSL grain boundaries (1S29) increased with increase of heat-treatment time when the laser-remelted specimens were heat-treated at 947C. Under laser surfa...

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  • ICALEO 2005 Paper #1603 (Laser Strengthening of Air-Cooled Diesel Engine Phosphorus Cast Iron Cylinder Liner and the Tribological Characteristics)

    Laser Strengthening of Air-Cooled Diesel Engine Phosphorus Cast Iron Cylinder Liner and the Tribological Characteristics
    Authors:
    Minlin Zhong, Tsinghua University; Beijing China
    Sanhuan Huang, Tsinghua University; Beijing China
    Wenjin Liu, Tsinghua University; Beijing China
    Presented at ICALEO 2005

    This paper presents the research on laser hardening of phosphorus cast iron cylinder liner of air-cooled diesel engine. The microstructure, microhardness and tribological characteristics of the strengthened layers were investigated. The research results indicated that laser surface melting results in the disappearance of strengthening phase steadites, which deteriorates the...

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  • ICALEO 2005 Paper #1604 (Mono- and Multi-Layer Magnesium Alloys Laser (Nd:YAG) Cladding Using Aluminum Based Powders)

    Mono- and Multi-Layer Magnesium Alloys Laser (Nd:YAG) Cladding Using Aluminum Based Powders
    Authors:
    Sorin Ignat, LTm - ENSAM; Cluny France
    Dominique Grevey, LTm; Le Creusot France
    Pierre Sallamand, LTm; Le Creusot France
    Presented at ICALEO 2005

    The development of the high purity magnesium alloys (such as WE43) incites the designers to reconsider them, and the car industry appears, these days, the most interested to use this kind of alloy. However, due to their supposed ignitability and tendency to oxidation, magnesium alloys require surface treatments. A series of experiments was carried out in order to improve the corrosion resistance and the hardness of two types o...

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  • ICALEO 2005 Paper #1606 (Single-Step Graded Surface Coating Using Combined Wire and Powder Feeding Laser Cladding)

    Single-Step Graded Surface Coating Using Combined Wire and Powder Feeding Laser Cladding
    Authors:
    Waheed Syed, The University of Manchester; Manchester Lancs Great Britain
    Andrew Pinkerton, The University of Manchester; Manchester Lancs UK
    Zhu Liu, The University of Manchester; Manchester Lancs UK
    Lin Li, The University of Manchester; Manchester Lancs UK
    Presented at ICALEO 2005

    This paper reports a new surface coating technique that employs combined powder and wire feeding laser cladding in a single process to deposit dissimilar materials to form a graded coating. Initial experiments were aimed at demonstrating the feasibility and the material distributi...

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  • ICALEO 2005 Paper #1701 (Laser Tool Control Recommendations)

    Laser Tool Control Recommendations
    Authors:
    Klaus Haensel, Hyperbel Laser Technology; Moembris Germany
    Manfred Berger, II-VI Deutschland GmbH; Darmstadt Germany
    Martin Benzing, II-VI Deutschland GmbH; Darmstadt Germany
    Presented at ICALEO 2005

    The numbers of sensor elements and detector units will grow. Future laser material processing systems for different applications will be designed for automatic or operation. Most laser beam parameters will be observed and the performing optical components will get an indicator which provides data regarding the life time cycle and / or the current performance.
    The constant dialog between the laser tool, the visible or invisible b...

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  • ICALEO 2005 Paper #1702 (Explaining Microstructural and Physical Variations in Rapid Additive Manufactured Waspaloy Parts Through the Laser-Deposition Thermal Cycle)

    Explaining Microstructural and Physical Variations in Rapid Additive Manufactured Waspaloy Parts Through the Laser-Deposition Thermal Cycle
    Authors:
    Andrew Pinkerton, University of Manchester; Manchester UK
    Waheed Syed, University of Manchester; Manchester Great Britain
    Lin Li, The University of Manchester; Manchester Great Britain
    Mallikarjun Karadge, University of Manchester; Manchester Great Britain
    Presented at ICALEO 2005

    Laser metal deposition has the potential to increase the material efficiency during the manufacture of superalloy aerospace components and also to reduce the need for welded joints to produce the necessary geometries. However, a poss...

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  • ICALEO 2005 Paper #1801 (Experimental Observations of the Laser Keyhole Welding Process of AA5182)

    Experimental Observations of the Laser Keyhole Welding Process of AA5182
    Authors:
    Benno Aalderink, NIMR/University of Twente CTW-WA; Enschede Netherlands
    Presented at ICALEO 2005

    For the laser keyhole welding process of Aluminium Tailor Welded Blanks, monitoring systems are in many cases vital to ensure a certain weld quality. Especially process visualization with camera based systems gives a lot of insight. Although for steel it has already been demonstrated that real-time images can be obtained from the laser welding process using these cameras based on silicon chips, for Aluminium this turns out to be problematic. The light emitted by the weld plume hides the weld pool from the coaxially mou...

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  • ICALEO 2005 Paper #1802 (Results on Process Control for YAG Steel Welding)

    Results on Process Control for YAG Steel Welding
    Authors:
    Pascal Aubry, CEA Saclay; Gif-sur-Yvette, Cedex France
    Mehdi Guiraud, Gip Gerailp; Arcueil France
    Presented at ICALEO 2005

    This article presents our the results of the part of the European IPCIM Project related to online process controls for steel welding of small to medium thickness. First the overall project is described. Then we present the setup used for the evaluation of the process control during welding. A coaxial camera is used to measure characteristics from the image of the keyhole. A second camera is used to measure characteristics from the image of the melt pool.. From a first set of trials, we evidence the corre...

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  • ICALEO 2005 Paper #1803 (Laser Shock Peening Plasma Diagnostics Sensors for Real-Time Process Monitoring)

    Laser Shock Peening Plasma Diagnostics Sensors for Real-Time Process Monitoring
    Authors:
    Pamela Benicewicz, GE Global Research; Niskayuna NY USA
    John Deaton, GE Global Research; Niskayuna NY USA
    Magdi Azer, GE Global Research; Niskayuna NY US
    Pingfan Wu, GE Global Research; Niskayuna NY USA
    Todd Rockstroh, GE Transportation; Evendale OH US
    Presented at ICALEO 2005

    We present optical sensors to monitor a laser-shock peening process in real time. The plasma that is generated during the LSP process emits light that can be temporally and spectrally analyzed to identify molecular and elemental constituents present in the material vaporized during ...

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  • ICALEO 2005 Paper #1804 (Low Cost Camera Based Sensor System for Advanced Laser Heat Treatment Processes)

    Low Cost Camera Based Sensor System for Advanced Laser Heat Treatment Processes
    Authors:
    Marko Seifert, Fraunhofer IWS; Dresden Saxony Germany
    Steffen Bonss, Fraunhofer IWS; Dresden Saxony Germany
    Jan Hannweber, Fraunhofer IWS; Dresden Saxony Germany
    Udo Karsunke, Fraunhofer IWS; Dresden Saxony Germany
    Eckhard Beyer, Fraunhofer IWS; Dresden Saxony Germany
    Presented at ICALEO 2005

    Industrial laser processes need to be reliable and well controlled. Infrared pyrometers are standard systems for contact-free temperature measuring at laser heat treatment. These systems are hardly to use for precise measurement at processes where large rectangular or...

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