• ICALEO 2007 Paper #P501 (Effects of Laser Parameters on Heat Distribution in a Cylindrical Sample)

    Effects of Laser Parameters on Heat Distribution in a Cylindrical Sample
    Authors:
    Daniel Perez, Universidad de Los Andes; Bogota Colombia
    Jagdish Luthra, Universidad de Los Andes; Bogota Colombia
    Suranjana Luthra, The University of Alabama; Tuscaloosa AL USA
    Jerald Izatt, The University of Alabama; Tuscaloosa AL USA
    Alvin Winters, The University of Alabama; Tuscaloosa AL USA
    Presented at ICALEO 2007

    The coherence, directionality and high power in the focal area make laser sources a very convenient source for controlled heating of a sample. The distribution of heat and temperatures produced by laser heating could also be used to control the rea...

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  • ICALEO 2007 Paper #P502 (An Analysis of Co2 and High Power Diode Laser Generated Glazes on Concrete in Terms of Wear)

    An Analysis of Co2 and High Power Diode Laser Generated Glazes on Concrete in Terms of Wear
    Authors:
    Jonathan Lawrence, Loughborough University; Leicestershire Great Britain
    Presented at ICALEO 2007

    The wear characteristics of a glaze generated on the ordinary Portland cement (OPC) surface of concrete was using a 2 kW high power diode laser (HPDL) and a 3 kW CO2 laser have been determined. Within both normal and corrosive environmental conditions, the wear rate of the CO2 and HPDL generated glazes were consistently higher than the untreated OPC surface of concrete. Life assessment testing revealed that surface glazing of the OPC with both the CO2 and the HPDL effected an increase in wear life o...

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  • ICALEO 2007 Paper #P503 (The Effect of Output Fibre Diameter when Welding Austenitic Stainless Steel with a Fibre Laser)

    The Effect of Output Fibre Diameter when Welding Austenitic Stainless Steel with a Fibre Laser
    Authors:
    Ian Pashby, The University of Nottingham; Nottingham Great Britain
    Jongkol Iammi, The University of Nottingham; Nottingham Great Britain
    Guijun Bi, The University of Nottingham; Nottingham Great Britain
    Presented at ICALEO 2007

    Fibre lasers are attractive for use in welding process because of their combination of properties which include high power and a good beam quality. However, the use of fibre lasers as a power source to join stainless steel has not been extensively researched. The aim of this research is to establish suitable parameters for fibre laser welding ...

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  • ICALEO 2007 Paper #P505 (Quantitative Analysis of Retained Austenite in Laser Melted Martensitic Stainless Steel)

    Quantitative Analysis of Retained Austenite in Laser Melted Martensitic Stainless Steel
    Authors:
    Tshidiso Seleka, CSIR National Laser Centre; Pretoria Southwest Africa
    Marie Ulbrich, Vaal University of Technology; Pretoria Southwest Africa
    Sisa Pityana, CSIR National Laser Centre; Pretoria Southwest Africa
    Lipson Rampedi, CSIR National Laser Centre; Pretoria Republic of South Africa
    Presented at ICALEO 2007

    An AISI 420 martensitic stainless steel, 0.6 mm thick was melted with a 4.4 Kw continuous wave Nd: Yag laser in order to induce a certain proportion of retained austenite in a matrix. The volume percentage of the retained austenite in the melted-surface...

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  • ICALEO 2007 Paper #P506 (Key Factors Influencing the Bend Per Pass in Laser Forming)

    Key Factors Influencing the Bend Per Pass in Laser Forming
    Authors:
    Stuart Edwardson, The University of Liverpool; Liverpool Great Britain
    Chris Carey, The University of Liverpool; Liverpool Great Britain
    Emile Abed, The University of Liverpool; Liverpool Great Britain
    Ken R. Edwards, The University of Liverpool; Liverpool Great Britain
    Geoff Dearden, The University of Liverpool; Liverpool Great Britain
    Ken G. Watkins, The University of Liverpool; Liverpool Great Britain
    Konrad Bartkowiak, Fraunhofer USA; Plymouth MI USA
    Presented at ICALEO 2007

    Laser forming offers the industrial promise of controlled shaping of meta...

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  • ICALEO 2007 Paper #P508 (Influence Analysis of Process Parameters over 7010 Aluminum Alloy Laser Machining using Taguchi Technique)

    Influence Analysis of Process Parameters over 7010 Aluminum Alloy Laser Machining using Taguchi Technique
    Authors:
    Gabriel Arias, Technical University Of Catalonia; Barcelona Spain
    Joaquim Ciurana, Girona University; Girona Spain
    Xavier Planta, ASCAMM; Cerdanyola de Valles Spain
    Javier Diaz, ASCAMM; Cerdanyola De Valles Spain
    Presented at ICALEO 2007

    Laser material processing is extensively used by numerous industries because the flexibility and cleanliness provided, but still with the advantages, is a complex process due the parameters that participate and interact. To overcome this issue, is essential to clearly understand the influence that exerts the p...

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  • ICALEO 2007 Paper #P510 (Predictive Model for Thick Steel Laser Cutting Quality using Artificial Neural Networks)

    Predictive Model for Thick Steel Laser Cutting Quality using Artificial Neural Networks
    Authors:
    Marimuthu Sundar, Jadavpur University; Kolkata India
    Asis Kumar Nath, RRCAT; Indore India
    C.H. Premsingh, RRCAT; Indore India
    Dipak Kumar Bandyopadhyay, Jadavpur University; Kolkata India
    Dipten Misra, Jadavpur University; Kolkata India
    Prabir Kumar Dey, Jadavpur University; Kolkata India
    Shankar Prasat chaudhuri, Jadavpur University; Indore India
    Presented at ICALEO 2007

    Laser assisted oxygen (LASOX) cutting is emerging as a promising technique for cutting thick steel in the industries. The end quality of the cut steel, v...

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  • ICALEO 2007 Paper #P514 (Laser Weld Penetration Improvement by Laser Activation Process with Oxygen)

    Laser Weld Penetration Improvement by Laser Activation Process with Oxygen
    Authors:
    Masami Mizutani, Joining and Welding Research Institute, Osaka Univ.; Ibaraki, Osaka Japan
    Seiji Katayama, Joining and Welding Research Institute, Osaka University, Japan; Ibaraki, Osaka Japan
    Presented at ICALEO 2007

    The authors have newly developed a LA-GTA (laser-activated Gas Tungsten Arc) welding process, which exerts a drastic effect on the increase in the GTA weld penetration. If this technique, which eventually controls the melt flows in the weld molten pool driven by the surface tension gradient, so called Marangoni convection, is applicable to the laser welding process, the laser weldabil...

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  • ICALEO 2007 Paper #P515 (Nanosecond 266 nm Laser Ablation of Glasses at Near-threshold Conditions)

    Nanosecond 266 nm Laser Ablation of Glasses at Near-threshold Conditions
    Authors:
    Xinghua Li, Corning Incorporated; Corning NY USA
    Sean Garner, Corning Incorporated; Corning NY USA
    Presented at ICALEO 2007

    We have investigated interaction of a nanosecond 266 nm laser with different glasses (zinc borosilicate, boro-aluminosilicate, borosilicate, fused silica, etc). Single pulse ablation behavior of the glasses at near threshold conditions was studied and the ablated area was measured with interferometry, SEM and AFM techniques. Based on the results we present single pulse ablation thresholds and correlations between ablation thresholds and material absorptions, material compositions...

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  • ICALEO 2007 Paper #P520 (Effects of Hybrid Welding Parameters on the Toughness of Weld Metal in Ship Structural Steel)

    Effects of Hybrid Welding Parameters on the Toughness of Weld Metal in Ship Structural Steel
    Authors:
    Jong-Bong Lee, POSCO; Pohang South Korea
    Seung-Gab Hong, POSCO; Pohang South Korea
    Presented at ICALEO 2007

    Since the 1990's, European shipbuilding industries introduced hybrid welding process in order to decrease thermal distortion of welded joints in passenger shipbuilding. In this study, we investigated effects of hybrid welding parameters on the toughness of weld metal using DH36 steel in order to obtain more sound welds in passenger shipbuilding. Type of leading process, joint gap distance and chemical composition of consumables were considerably correlated with the toughness ...

    $28.00

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