• JLA Vol:23 Iss:2 (Recent advances in laser surface treatment of titanium alloys)


    Authors:
    J. J. Candel
    V. Amigo´
    ITM Instituto de Tecnologia de Materiales, UPV, Valencia, Spain


    This paper reviews progress over the last five years in the field of laser surface modification of titanium alloys. The authors analyze the effect of new laser technologies and new materials as tools for improving surface properties—specifically, biocompatibility and resistance to wear, corrosion, and high temperatures. The authors discuss the effect of laser processing parameters on the microstructure and compare the results obtained by various researchers. Therefore, an overview of the difficulties involved in the laser processing of titanium is provided with a di...

    $25.00

  • JLA Vol:7 Iss:4 (Laser cutting of thick sectioned steels using gas flow impingement on the erosion front)


    Authors:
    P. M. Ilavarasan
    P. A. Molian
    Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, U.S.A.


    An off‐axial gas jet has been developed that has the potential to extend the laser's effectiveness by improving the rate at which parts can be machined, producing high‐quality surfaces, enhancing the cutting thickness, and adding to the range of materials that can be machined. In laser cutting, an erosion front (liquid–gas region) forms at the momentary end of the cut. Laser heating, exothermic reactions and shear force between the gas flow and the molten layer dictate the material removal rates. The principle of the off‐axi...

    $25.00

  • JLA Vol:26 Iss:1 (Periodic antireflection surface structure fabricated on silicon by four-beam laser interference lithography)


    Authors:
    Z. Zhang
    CNM and JR3CN, Changchun University of Science and Technology, Changchun 130022, China and CHO, Changchun Observatory, National Astronomical Observatory, CAS, Changchun 130117, China

    Z. Wang
    D. Wang
    CNM and JR3CN, Changchun University of Science and Technology, Changchun 130022, China and JR3CN, University of Bedfordshire, Luton LU1 3JU, United Kingdom

    Y. Ding
    CNM and JR3CN, Changchun University of Science and Technology, Changchun 130022, China


    Silicon surface structures with excellent antireflection property arouse wide interest. Chemical and physical methods such as femtosecond, nanosecond, and picosecond la...

    $25.00

  • JLA Vol:16 Iss:1 (Laser-assisted chemical cleaning for oxide-scale removal from carbon steel surfaces)


    Authors:
    Hyunkyu Lim
    Dongsik Kim
    Department of Mechanical Engineering, POSTECH, Pohang 790-784, Korea


    The article introduces a novel laser chemical processing technique for removing thin oxide layers on low-carbon steel surfaces by combining laser-induced shock waves and the chemical cleaning technique that is currently utilized in the conventional oxide-scale removal. A Q-switched Nd:yttritium–aluminum–garnet laser (wavelength 1064 nm, full width at half maximum 6 ns) induces optical breakdown in the acid solution, producing intense pressure waves which act as a noncontact scale breaker. It has been demonstrated that the novel process leads to substa...

    $25.00

  • JLA Vol:20 Iss:2 (<em>In vivo</em> and <em>in vitro</em> evaluation of the corneal damage induced by 1573&ensp;nm laser radiation)


    Authors:
    Daniel Courant
    Catherine Chapel
    Ce´line Billy
    Service de Radiobiologie et d’Oncologie, IRCM-DSV, Commissariat à l’Energie Atomique, BP 6, Fontenay aux roses, 92265, France

    Nicole Salès
    Service d’Immuno-Virologie, IMETI-DSV, Commissariat à l’Energie Atomique, BP 6, Fontenay aux roses, 92265, France

    Jean-Claude Pe´rot
    Christophe Pothier
    Lasers Optique et Thermique, CEP, Direction des Centres d’Essai et d’Expertise, 16bis avenue Prieur de la Cŏte d’Or, 94114, Arcueil, France


    This study involved the corneal effects of t...

    $25.00

  • JLA Vol:9 Iss:6 (&hellip; .But is it really safe?)


    Authors:
    Peter A. Smith
    DERA Centre for Human Sciences, Farnborough, Hampshire, U.K.


    $25.00

  • JLA Vol:3 Iss:2 (Laser Applications in Criminalistics)


    Authors:
    E. R. Menzel
    Center for Forensic Studies, Department of Physics, Texas Tech University, Lubbock, Texas 79409


    Lasers find application in numerous areas of criminalistics, such as fiber analysis, document examination and serology. Their widest use, however, is in detection of latent fingerprints. Several routine procedures for obtaining laser&hyphen;excited fingerprint fluorescence on a range of surfaces have been developed. However, many surfaces fluoresce so strongly themselves that they are not amenable to these procedures. Time&hyphen;resolved luminescence imaging is being investigated to permit detection of fingerprints on such surfaces.

    $25.00

  • JLA Vol:1 Iss:1 (High&hyphen;Speed Laser Welding Discontinuities)


    Authors:
    Charles E. Albright
    Shichan Chiang
    Department of Welding Engineering, Ohio State University, Columbus, Ohio


    $25.00

  • JLA Vol:14 Iss:2 (Thermomechanical effects in laser microprocessing for dieless metal wire drawing)


    Authors:
    Yonggang Li
    School of Optic/CREOL (Center for Research and Education of Optics and Lasers), Mechanical, Materials and Aerospace Engineering Department, University of Central Florida, Orlando, Florida, 32816-2700

    Nathaniel R. Quick
    USF Filtration and Separations Group, Inc., 1750 Filter Drive, DeLand, Florida 32724-2045

    Aravinda Kar
    School of Optic/CREOL (Center for Research and Education of Optics and Lasers), Mechanical, Materials and Aerospace Engineering Department, University of Central Florida, Orlando, Florida, 32816-2700


    A new dieless metal fiber drawing process is developed in which a high-precision laser is used to heat the...

    $25.00

  • JLA Vol:24 Iss:1 (Hazard class downscaling of a class 4 retina safe laser)


    Authors:
    Jed A. Simmons
    Alan B. Marchant
    Energy Dynamics Laboratory, North Logan, Utah 84341


    A class 4 pulsed laser can be operated in a safe regime without reducing instantaneous irradiance or pulse energy by shortening its dwell time through duty cycle reduction or scanning. A conservative relationship for hazard distance as a function of scan rate is derived for the case of a scanning, retina safe laser.

    $25.00

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