• ICALEO 2006 Paper #106 (Which Laser Process for Steel to Aluminium Joining?)

    Which Laser Process for Steel to Aluminium Joining?
    Authors:
    Guillaume Sierra, CEA/DRT/GERAILP and LMGC; Montpellier France
    Patrice Peyre, GERAILP/LALP; Arcueil France
    David Stuart, GERAILP/LALP; Arcueil France
    Frédéric Deschaux-Beaume, LMGC UMR 5508 CNRS; Montpellier France
    Gilles Fras, LMGC UMR 5508 CNRS; Montpellier France
    Presented at ICALEO 2006

    The joining of galvanized -or not- low carbon steel to 6000 aluminium alloys was investigated by Nd:YAG laser process with three different assembling modes : 1) a key-hole mode welding which generates liquid aluminium to liquid steel interaction, 2) a solid steel to liquid aluminium interaction ...

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  • ICALEO 2006 Paper #107 (Laser Joining of Steel-Aluminum Joints in T Configuration)

    Laser Joining of Steel-Aluminum Joints in T Configuration
    Authors:
    Jeroen van Tienhoven, University of Twente; Enschede Netherlands
    B. Pathiraj, University of Twente; Enschede Netherlands
    J. Meijer, University of Twente; Enschede Netherlands
    Presented at ICALEO 2006

    A laser joining process employing a Nd:YAG laser source, a cold wire feeder and a six axes robot has been developed to produce steel to aluminum transition joints. To obtain good strength, it is critical to minimize the formation of intermetallic phases at the joint. This has been achieved by a careful manipulation of the laser power and the laser beam position. This enabled the steel to be kept in a solid ...

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  • ICALEO 2006 Paper #1101 (Fiber Laser Welding of 780MPa High Strength Steel)

    Fiber Laser Welding of 780MPa High Strength Steel
    Authors:
    Zhongjie Liu, Nagoya University; Nagoya Japan
    Muneharu Kutsuna, Nagoya University; Nagoya Japan
    Guojian Xu, Nagoya University; Nagoya Japan
    Presented at ICALEO 2006

    A 2kW Ytterbium fiber laser, YLR-2000, was used for welding of 780MPa grade high strength steel-WEL-TEN780RE. The WEL-TEN780RE steel is a kind of heat rolled, fine microstructure low carbon high strength steel used for welded constructions. The effects of defocusing distance, welding speed, shielding gas and its flow rate on cross section bead shape and penetration were studied in continue wave laser beam welding. The effects of frequency and duty c...

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  • ICALEO 2006 Paper #1104 (Optimization of Parameters for Effective Welding of Aerospace Components)

    Optimization of Parameters for Effective Welding of Aerospace Components
    Authors:
    Devdas Shetty, University of Hartford; West Hartford CT USA
    Adil Widaatalla, University of Hartford; West Hartford CT USA
    Tom Eppes, University of Hartford; West Hartford CT USA
    Presented at ICALEO 2006

    Inconel 625 is nickel-based supper alloy used in different jet engines for its high corrosion resistance. Laser welding of combustor part of jet engine to replace the existing procedure is a major area of research and development. The specification of this manufacturing process requires the weld to be hermetic sealed. The use of fiber laser and the study of the effect of laser welding par...

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  • ICALEO 2006 Paper #1202 (Mechanical Performance of Laser Deposition Repairing of IN 738 on Directionally Solidified Superalloy Blade)

    Mechanical Performance of Laser Deposition Repairing of IN 738 on Directionally Solidified Superalloy Blade
    Authors:
    Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
    Xiaofeng Zhu, Tsinghua University; Beijing Peoples Republic of China
    Wenjin Liu, Tsinghua University; Beijing Peoples Republic of China
    Presented at ICALEO 2006

    Development of cost-effective repair and rejuvenation processes for DS supperalloy blades are of great economic and technological meanings due to the high cost of the blades. Laser deposition has been proved to be a promising method to repair supperalloy components especially directionally solidified Ni-based superalloy blades, ...

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  • ICALEO 2006 Paper #1203 (Direct Manufacturing of Aeronautical Components by Laser Metal Deposition of TI-6AI-4V)

    Direct Manufacturing of Aeronautical Components by Laser Metal Deposition of TI-6AI-4V
    Authors:
    Julie Maisonneuve, Centre des Materiaux - Ecole des Mines de Paris; EVRY France
    Bienvenu Yves, Centre des Materiaux; Evry France
    Christophe Colin, Centre des Materiaux; Evry France
    Aubry Pascal, GIP-Gerailp; Arcueil France
    Presented at ICALEO 2006

    Profil project concerns direct manufacturing by two additive processes which are laser metal deposition and selective laser sintering. The involved partners are the GIFAS group (DASSAULT AVIATION, MBDA, EUROCOPTER, SNECMA, EADS), School of Mines (Centre des Materiaux) and GIP-Gerailp. During the first year of the proje...

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  • ICALEO 2006 Paper #1204 (Absorption Coefficient Characterization in Ti-6Al-4V Laser Additive Manufacturing)

    Absorption Coefficient Characterization in Ti-6Al-4V Laser Additive Manufacturing
    Authors:
    Anil Chaudhary, Applied Optimization, Inc.; Dayton OH USA
    Matt Keller, Applied Optimization, Inc.; Dayton OH USA
    Shawn Kelly, Laser Processing Division, ARL; State College, PA PA USA
    Steven Medeiros, Wright Patterson AFB; Dayton OH USA
    Presented at ICALEO 2006

    In order to accurately model the laser deposition of Ti-6Al-4V aerospace components, the interaction of the laser and metal powder feedstock has been investigated. One of the key modeling parameters, the absorption coefficient of the material, is often unknown for material in powder form. It has been shown tha...

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  • ICALEO 2006 Paper #1205 (Qualification of Nd:YAG Laser Direct Metal Deposition Techniques for Repair of Nickel Superalloy Components)

    Qualification of Nd:YAG Laser Direct Metal Deposition Techniques for Repair of Nickel Superalloy Components
    Authors:
    A A Lugan, TWI Ltd; Cambridge Great Britain
    C Rinaldi, CESI RICERCA SpA; Milano Italy
    G B Melton, TWI Ltd; Cambridge Great Britain
    Paul Hilton, TWI Ltd.; Great Abington, Cambridge Great Britain
    Presented at ICALEO 2006

    The high temperature operating components of power utility gas turbines are often made with gamma prime reinforced nickel based superalloys. As a result, there is a very high cost ascociated with the replacement of any parts damaged during service. The economic benefits to be gained by using repair procedures as opposed to rep...

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  • ICALEO 2006 Paper #1206 (Laser Consolidation of Net-Shape Shells for Flextensional Sonar Projectors)

    Laser Consolidation of Net-Shape Shells for Flextensional Sonar Projectors
    Authors:
    Lijue Xue, National Research Council Canada; London Ontario Canada
    Chris Purcell, Defence Research and Development Canada- Atlantic; Dartmouth NS Canada
    Presented at ICALEO 2006

    Laser consolidation (LC) is a computer-aided manufacturing process that builds a functional net-shape part directly from a CAD model, without the use of moulds or dies. The folded shell projector (FSP) is a compact flextensional underwater sound projector developed by DRDC-Atlantic for low frequency sonar applications. The radiating surface of the FSP is a thin-walled shell of complex shape that challenges conventional manuf...

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  • ICALEO 2006 Paper #1301 (Applications Review: Materials Processing with Fiber Lasers under 1KW)

    Applications Review: Materials Processing with Fiber Lasers under 1KW
    Authors:
    Vijay Kancharla, IPG Photonics Corporation; Oxford MA USA
    Presented at ICALEO 2006

    Fiber lasers have been gaining ground rapidly in the recent years for material processing applications. A host of applications currently employed with other laser technologies have shifted focus to this very fast emerging technology. While the technology is being familiarized and accepted in the industry, there is limited data and summary of industrial applications of fiber lasers. In this review, an outline of numerous such applications with ytterbium lasers under 1KW is discussed and case studies are presented. Applications and laser...

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