• JLA Vol:16 Iss:1 (Laser-induced electrochemical characteristics of aluminum alloy 2024-T3)


    Authors:
    Olga Kachurina
    Tammy L. Metroke
    Kai Dou
    Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078


    Laser-induced surface modification of aluminum alloy 2024-T3 was investigated as laser intensity dependence of surface composition and patterning related to electrochemical characteristics using techniques of environmental scanning electron microscopy (ESEM), potentiodynamic scan, and electrochemical impedance spectroscopy (EIS). Analysis of surface composition using ESEM and EIS indicated that laser fluences in a range of 1.1–1.3 J/cm2 were found to preferentially reduce the copper concentration in the alloy surf...

    $25.00

  • JLA Vol:20 Iss:2 (Review of exposure limits and experimental data for corneal and lenticular damage from short pulsed UV and IR laser radiation)


    Authors:
    Karl Schulmeister
    Austrian Research Centers, A-2444 Seibersdorf, Austria

    David H. Sliney
    US Army Center for Health Promotion and Preventive Medicine, Aberdeen Proving Ground, Maryland 21010-5422

    John Mellerio
    Department of Ophthalmology, Rayne Institute, St. Thomas’ Hospital, London, SE1 7EH, United Kingdom

    David J. Lund
    Bruce E. Stuck
    US Army Medical Research Detachment, Walter Reed Army Institute of Research, Brooks City-Base, San Antonio, Texas 78235-5108

    Joseph A. Zuclich
    Northrop Grumman Information Technology, San Antonio, Texas 78288-1330


    Laser exposure limits as ...

    $25.00

  • JLA Vol:8 Iss:6 (Laser surface alloying of magnesium base alloys)


    Authors:
    R. Galun
    A. Weisheit
    B. L. Mordike
    Institut fu¨r Werkstoffkunde und Werkstofftechnik, Technische Universita¨t Clausthal, Agricolastraße 6, D‐38678 Clausthal‐Zellerfeld, Germany


    The feasibility of the laser surface alloying of magnesium base alloys with aluminum, copper, nickel and silicon has been shown in this work. By laser alloying with these elements, using a 5 kW CO2‐laser, the hardness of several magnesium base alloys can be increased to values above 250 HV0.1. Melted depths from 700–1200 μm and alloying contents from 15–55 at % were achieved. The wear resistance of ...

    $25.00

  • JLA Vol:1 Iss:4 (Optical Methods in Flow Visualization)


    Authors:
    Wen‐Jei Yang
    Yi Chen
    Department of Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, Michigan 48109


    Optical techniques for flow visualization are presented, including light‐sheet flow visualization, shadowgraphy, schlieren method, interferometry, holography, speckle photography, laser‐induced fluorescence and thermography. The principles of these methods are briefly described and the examples of their applications to flow visualization are given.

    $25.00

  • JLA Vol:1 Iss:1 (Laser Application in Otolaryngology — Head and Neck Surgery)


    Authors:
    Michael Barat
    Robert H. Ossoff
    Vanderbilt University Medical Center, Department of Otolaryngology, Nashville, Tennessee


    Since the discovery of the laser in 1959, a wide variety of lasers have been developed with numerous clinical applications in medicine and surgery. Lasers have had a great impact on the surgical approach to both benign and malignant diseases in Otolaryngology‐Head and Neck Surgery, and have enabled the otolaryngologist to manage diseases in the aerodigestive system primarily through an endoscopic approach. We will summarize the physical properties of the currently used lasers in otolaryngology, as well as their clinical applications.

    $25.00

  • JLA Vol:14 Iss:3 (Appropriate regimes of laser drilling models containing melt eject mechanisms)


    Authors:
    S. S. Kudesia
    Department of Physics, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, United Kingdom

    P. Solana
    Departamento de Matema´tica Aplicada, Universidad Polite´cnica de Madrid, Spain

    W. S. O. Rodden
    D. P. Hand
    J. D. C. Jones
    Department of Physics, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, United Kingdom


    The significance of melt ejection during various drilling regimes of laser drilling is investigated. The predictions of two analytical models of the drilling process, with and without the melt ejection mechanism, are compared with experimental measurements made using a ...

    $25.00

  • JLA Vol:18 Iss:3 (Multiscale modeling of solidification during laser cladding process)


    Authors:
    Y. Cao
    J. Choi
    Department of Mechanical and Aerospace Engineering, University of Missouri-Rolla, Rolla, Missouri 65409-1060


    Laser cladding is an additive manufacturing process in which a laser generates a melt pool on the substrate material while a second material in a powder or wire form is injected into that melt pool. Among all laser manufacturing processes, laser cladding offers the most extensive variety of possibilities to alter a component at its surface. Despite immense potential and advancements, the process model of microstructure evolution and its coupling with macro parameters of the laser cladding process has not been fully developed. To address this...

    $25.00

  • JLA Vol:16 Iss:4 (Microstructural aspects of laser dissimilar welds of hard metals to steels)


    Authors:
    A. Costa
    IDMEC, Av. Rovisco Pais, 1049-001 Lisboa, Portugal

    L. Quintino
    IDMEC, Av. Rovisco Pais, 1049-001 Lisboa, Portugal and Instituto Superior Te´cnico, Secc¸a˜o de Tecnologia Mecaˆnica, Av. Rovisco Pais, 1049-001 Lisboa, Portugal

    R. M. Miranda
    IDMEC, Av. Rovisco Pais, 1049-001 Lisboa, Portugal and Universidade Aberta, R. Escola Polite´cnica 147, 1269-001 Lisboa, Portugal


    Laser beam welding has been widely used in industry in the past decade. Recently, applications in dissimilar welds involving hard metals have been investigated. Hard metals are commonly used in tool manufacturing and this application...

    $25.00

  • JLA Vol:21 Iss:1 (Local susceptibility of the retina, formation and duration of afterimages in the case of Class 1 laser products, and disability glare arising from high-brightness light emitting diodes)


    Authors:
    Hans-Dieter Reidenbach
    Cologne University of Applied Sciences, Research Laboratory on Medical Technology and Non-Ionizing Radiation, Betzdorfer Str 2, 50679 Koeln, Germany


    According to the new European Directive on Artificial Optical Radiation, the employer has to determine the exposure and the assessment of risks and in addition, he shall give particular attention to any indirect effects, such as temporary blinding, when carrying out the risk assessment. Up to now, secondary effects such as temporary blinding have not been regarded in safety standards and there exist but a few data on this topic as far as modern artificial high-brightness (HB) light sources are concerned. Te...

    $25.00

  • JLA Vol:23 Iss:1 (Review of laser microscale processing of silicon carbide)


    Authors:
    B. Pecholt
    S. Gupta
    P. Molian
    Department of Mechanical Engineering, Laboratory for Lasers, MEMS and Nanotechnology, Iowa State University, Ames, Iowa 50011


    A review of various laser techniques for microscale processing of SiC for microelectronics and microelectromechanical-system applications is presented. SiC is an excellent material for harsh environments due to its outstanding mechanical, thermal, and chemical properties. However, its extreme thermodynamic stability and inert properties created difficulties in conventional microfabrication methods which provided an opportunity for the exploration of laser processing as an alternative. Many aspects...

    $25.00

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