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  • ICALEO 2009 Paper #1104 (High Pulse Energy (HPE) Picosecond (ps) Laser)

    High Pulse Energy (HPE) Picosecond (ps) Laser
    Authors:
    Joyce Kilmer, Photonics Industries International, Inc.; Bohemia NY USA
    Santosh Pisharody, Photonics Industries International, Inc.; Bohemia NY USA
    Yusong Yin, Photonics Industries International, Inc.; Bohemia NY USA
    Presented at ICALEO 2009

    High Pulse Energy (HPE) Picosecond (ps) lasers are effective tools for processing a wide range of materials ranging from brittle samples that exhibit chipping/cracking to metals or composite materials such as the novel thin film solar cell material, Copper indium gallium selenide (CIGS), which suffer thermal deformation from long pulse laser processing. Mechanically machining me...

    $28.00

  • ICALEO 2009 Paper #1103 (Laser-based Machining of Fine Features Scales for High Precision Optical Position Encoders)

    Laser-based Machining of Fine Features Scales for High Precision Optical Position Encoders
    Authors:
    Stephanie Giet, Heriot Watt University; Edinburgh Scotland
    Charalampos Michakis, Heriot Watt University; Edinburgh Scotland
    Jonathan Parry, Heriot Watt University; Edinburgh Scotland
    Matthew Kidd, Renishaw Plc; Edinburgh Scotland
    A. Ellin, -; -
    Jonathan Shephard, Heriot Watt University; Edinburgh Scotland
    Nick Weston, Renishaw Plc; Edinburgh Scotland
    Duncan Hand, Heriot Watt University; Edinburgh Scotland
    Presented at ICALEO 2009

    High precision optical motion encoders provide reliable high-accuracy positio...

    $28.00

  • ICALEO 2009 Paper #1102 (Assessment of Part Quality in Laser Assisted Milling of Silicon Nitride Ceramic)

    Assessment of Part Quality in Laser Assisted Milling of Silicon Nitride Ceramic
    Authors:
    Budong Yang, Kansas State University; Manhattan KS USA
    Jiangang Sun, Argonne National Laboratory; Argonne IL USA
    Elizabeth Frink, Kansas State University; Manhattan KS USA
    Shuting Lei, Kansas State University; Manhattan KS USA
    Kevin Lease, Kansas State University; Manhattan KS USA
    Presented at ICALEO 2009

    Due to the high brittleness of ceramic materials, the performance of ceramic components is very sensitive to machining damage. As laser assisted machining (LAM) poises to become a potentially cost-effective machining process for structural ceramics such a...

    $28.00

  • ICALEO 2009 Paper #1101 (Fiber Laser Assisted Machining of Silicon Nitride)

    Fiber Laser Assisted Machining of Silicon Nitride
    Authors:
    Federico Sciammarella, Northern Illinois University; DeKalb IL USA
    Michael Matusky, Northern Illinois University; Dekalb IL USA
    Presented at ICALEO 2009

    Laser Assisted Machining (LAM) of ceramics is an important area of research concerning the improvement upon conventional diamond grinding machining processes. The problems associated with the machinability of these advanced ceramic materials, specifically silicon nitride (Si3N4), have already lead to previous research work done with LAM. Utilizing the advent of high power fiber diode lasers, current research can now be completed outside the realm of traditional lasers such...

    $28.00

  • ICALEO 2009 Paper #107 (On the Meaning of Zinc Coatings in Hybrid Welding of Aluminium to Steel)

    On the Meaning of Zinc Coatings in Hybrid Welding of Aluminium to Steel
    Authors:
    Frank Vollertsen, BIAS GmbH; Bremen Germany
    Claus Thomy, BIAS GmbH; Bremen Germany
    Presented at ICALEO 2009

    Laser MIG hybrid welding was recently suggested as a feasible process for joining of aluminium to steel for both structural and tailored blank applications. In this process, the aluminium is molten to create a brazed bond to the zinc-coated steel sheet, which remains solid. To further investigate the effect of process parameters, laser power, MIG arc power, wire feed rate, welding speed and arc position relative to the abutting edges were varied for the case of butt joints of aluminium alloy AA 6...

    $28.00

  • 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...

    $28.00

  • 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...

    $28.00

  • 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...

    $28.00

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