• ICALEO 2009 Paper #106 (High Brightness Hybrid Welding of Steel)

    High Brightness Hybrid Welding of Steel
    Authors:
    Brian Victor, EWI; Columbus OH USA
    Brad Nagy, EWI; Columbus OH USA
    Stan Ream, EWI; Columbus OH USA
    Dave Farson, Ohio State University; Columbus OH USA
    Presented at ICALEO 2009

    With the increasing power and performance of high-brightness solid-state lasers, laser-GMAW hybrid welding is becoming more practical for thick-section welding applications. This study evaluated hybrid welding of steel butt joints with a 10kW fiber laser. Welding trials were conducted to evaluate the effect that beam-to-wire distance and process orientation (arc-leading vs. laser-leading) had on the hybrid process. Both full and par...

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  • ICALEO 2009 Paper #105 (Monitoring of Hybrid Laser-Arc Welding of Galvanized Steels in a Gap-Free Lap Joint Configuration)

    Monitoring of Hybrid Laser-Arc Welding of Galvanized Steels in a Gap-Free Lap Joint Configuration
    Authors:
    Shanglu Yang, Southern Methodist University; Dallas TX USA
    Rouzbeh Sarrafi, -; -
    Radovan Kovacevic, -; -
    Presented at ICALEO 2009

    Hybrid laser-arc Welding of galvanized steels in a gap-free lap joint configuration is a complicated welding process, which is involved in many welding parameters such as laser power, welding speed as well as the distance between laser beam and GTAW torch. Furthermore, the dynamic behaviors of the molten pool, which reflect the stability of the welding process, is significantly affected by the dynamic behaviors of highly-pressurized z...

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  • ICALEO 2009 Paper #104 (Criterion for Online Evaluation of Penetration Status in Laser-MIG Hybrid Welding and Its Application)

    Criterion for Online Evaluation of Penetration Status in Laser-MIG Hybrid Welding and Its Application
    Authors:
    Yongqiang Zhang, Shougang Research Institute of Technology; Beijing Peoples Republic of China
    Wuzhu Chen, Department of Mechanical Engineering,Tsinghua University; Beijing Peoples Republic of China
    Yuanqing Shuang, Department of Mechanical Engineering,Tsinghua University; Beijing Peoples Republic of China
    Jun Zhang, Shougang Research Institute of Technology; Beijing Peoples Republic of China
    Presented at ICALEO 2009

    The root penetration status in hybrid butt welding is the most important criterion for evaluating the weld joint quality. The weld ro...

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  • ICALEO 2009 Paper #103 (Comparative Analysis of GMA, Laser and Laser-GMA Hybrid Welding)

    Comparative Analysis of GMA, Laser and Laser-GMA Hybrid Welding
    Authors:
    Jukka Siltanen, Rautaruukki Oyj; Hämeenlinna Finland
    Markus Suomi, Helsinki University of Technology; Helsinki Finland
    Presented at ICALEO 2009

    Laser welding and laser-MAG hybrid welding are used more often in heavy industry. It is very typical that a product earlier welded by arc welding needs changes to its design when laser or laser-MAG hybrid welding processes are considered. This presentation is based on a Masters thesis, the aim of which was to give guidelines for structural designers. The material used in the welding tests was S355K2 (according to EN 10025-2:2004). Joint geometries were butt and T-j...

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  • ICALEO 2009 Paper #102 (Diffusible Hydrogen Characteristics of Hybrid Laser Arc Welding (HLAW))

    Diffusible Hydrogen Characteristics of Hybrid Laser Arc Welding (HLAW)
    Authors:
    Paul A. Blomquist, Applied Thermal Sciences, Inc.; Sanford ME USA
    Stanley E. Ferree, ESAB Welding and Cutting Products; - USA
    Brian M. Marx, Concurrent Technologies Corp; - USA
    Presented at ICALEO 2009

    With the increased interest in Hybrid Laser Arc Welding (HLAW) in the U.S., the process is being certified for use on increasingly higher strength steels. The addition of the laser to the traditional Gas Metal Arc Welding (GMAW) process results in a higher total melt volume than that of the GMAW process alone. Studies of hydrogen content of HLAW welds were carried out in which comparisons w...

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  • ICALEO 2009 Paper #101 (The Effects of Surface Topography and Lack of Fusion on the Fatigue Strength of Laser Hybrid Welds)

    The Effects of Surface Topography and Lack of Fusion on the Fatigue Strength of Laser Hybrid Welds
    Authors:
    Md. Minhaj Alam, Lulea University of Technology; Lule� Sweden
    Zuheir Barsoum, Royal Institute of Technology (KTH); Stockholm Sweden
    Per Jonsen, Lulea University of Technology; Lulea Sweden
    Hans Ake Haggblad, Lulea University of Technology; Lulea Sweden
    Alexander Kaplan, Lulea University of Technology; Lulea Sweden
    Presented at ICALEO 2009

    The geometrical aspects of laser hybrid welding before, during and after the process differ from autonomous laser welding and from arc welding. When studying the fatigue behaviour of laser hybrid weld...

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  • ICALEO 2009 Paper #1006 (Phase Evolution in Laser Solid Formed Compositionally Graded Ti60-Ti2AlNb Alloys)

    Phase Evolution in Laser Solid Formed Compositionally Graded Ti60-Ti2AlNb Alloys
    Authors:
    Xin Lin, Northwestern Polytechnical University; Xi'an Peoples Republic of China
    Mocong Yang, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University; Xi\'An Peoples Republic of China
    Xiaojing Xu, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University; Xi\'An Peoples Republic of China
    Haiou Yang, -; -
    Jing Chen, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University; Xi\'An Peoples Republic of China
    Weidong Huang, State Key Laboratory of Solidification Process...

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  • ICALEO 2009 Paper #1005 (A Method and Model for Deposition of TI-6Al-4V with Controlled Porosity)

    A Method and Model for Deposition of TI-6Al-4V with Controlled Porosity
    Authors:
    Muhammad Naveed Ahsan, Manufacturing and Laser Processing Group,The University of Manchester; Manchester Great Britain
    Andrew J Pinkerton, Manufacturing and Laser Processing Group,The University of Manchester; Manchester Great Britain
    Presented at ICALEO 2009

    The use of porous engineered materials is gaining popularity in biomedical implant manufacture due to its capability to promote increased osseointegration and cell proliferation. A method to produce such parts is laser direct metal deposition (LDMD) - a rapid manufacturing technique that has much flexibility. In this work, a 1.5 kW high power diod...

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  • ICALEO 2009 Paper #1003 (Laser Deposition of TI6Al4V-316L Composition Gradient Structure: Challenge on Intermetallics)

    Laser Deposition of TI6Al4V-316L Composition Gradient Structure: Challenge on Intermetallics
    Authors:
    Changsheng Dong, Tsinghua University, Dept of Mechanical Engineering; Beijing Peoples Republic of China
    Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
    Wenjin Liu, -; -
    Minxing Ma, -; -
    Hongjun Zhang, -; -
    Presented at ICALEO 2009

    Functional gradient materials (FGM), with their composition gradually varied in different positions, have attracted much attention for research and development during the years. Normally there are two types of functional gradient materials: one without the formation of intermetallics which is ...

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  • ICALEO 2009 Paper #1002 (Direct Fabrication of a Ti-47Al-2Cr-2Nb Alloy by Selective Laser Melting and Direct Metal Deposition Processes)

    Direct Fabrication of a Ti-47Al-2Cr-2Nb Alloy by Selective Laser Melting and Direct Metal Deposition Processes
    Authors:
    Christophe Colin, Centre Des Materiaux, Mines Paris, Paristech; Evry France
    Ludovic Thivillon, Enise; Saint-Etienne France
    Marc Thomas, Onera; Chatillon France
    PASCAL AUBRY, CEA; Gif-sur-Yvette France
    Patrice Peyre, Arts Et Miers Paristech; Paris France
    Philippe Bertrand, Enise; Saint-Etienne France
    Thierry Malot, Arts Et Miers Paristech; Paris France
    Thomas Vilaro, Centre Des Materiaux, Mines Paristech; Evry France
    Vera Kottman-Rexerodt, Onera; Chatillon France
    Vincent Ji,...

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