• JLA Vol:4 Iss:1 (The Impact of European Standards, Directives and the CE Mark)


    Authors:
    A. Roy Henderson
    Bioptica, St. John's Innovation Park, Cambridge U.K.


    $25.00

  • JLA Vol:17 Iss:2 (Modeling of laser deposition and repair process)


    Authors:
    Lijun Han
    Kaushik M. Phatak
    F. W. Liou
    Department of Mechanical and Aerospace Engineering, University of Missouri-Rolla, Rolla, Missouri 65409-1350


    Laser aided deposition is a material additive based manufacturing process via metallurgically bonding the deposited material to the substrate. Due to its capability to bond various materials together, it becomes an attractive technology for part repair in small scale. However, the details of the process remain an active area for research because of the complicated interactions involved. In this study, a mathematical model was established to investigate thermal and mass transportation phenomena, which incl...

    $25.00

  • JLA Vol:25 Iss:5 (Numerical and experimental study of the effect of groove on plasma plume during high power laser welding)


    Authors:
    Cai Yan
    Xie Wen-Jing
    Wu Yue
    Sun Da-Wei
    Wu Yixiong
    Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai 200240, China and Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai 200240, China


    The influence of groove on the static feature and dynamic behavior of plasma plume during high power CO2 laser welding process was studied using a hydrodynamic three-dimensional model and corresponding experiments. The temperature, composition, and velocity of plasma plume along the incident path of laser beam were computed. The static morphology of plasma plume was analyzed through both models ...

    $25.00

  • JLA Vol:21 Iss:4 (How the laser started)


    Authors:
    Charles Townes
    Department of Physics, University of California, Berkeley, California 94720


    $25.00

  • JLA Vol:23 Iss:4 (Investigation of the effect of irradiance and pulse duration in industrial percussion laser-drilling of Waspaloy)


    Authors:
    Robin Bright
    Harris L. Marcus
    Institute of Materials Science and the Department of Chemical, Materials, and Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269-3136


    As the use of pulsed lasers in the manufacture of cooling holes in high-temperature gas-turbine engine components continues to increase, understanding the material behavior during laser-material interaction and the subsequent effects on hole quality becomes critical. In this study, atomic emission spectroscopy is used to monitor the optical characteristics of ejected material during percussion laser-drilling of Waspaloy over irradiance and pulse duration values in the ranges...

    $25.00

  • JLA Vol:6 Iss:2 (National Science Foundation undergraduate faculty enhancement workshop on advanced laboratory experiments using lasers)


    Authors:
    James E. Parks
    Charles S. Feigerle
    Robert Deserio
    Joseph Wiest



    A National Science Foundation undergraduate faculty enhancement workshop on advanced laboratory experiments using lasers was developed at the University of Tennessee, Knoxville, with the authors as the instructors. The workshop emphasized the development and implementation of laser‐based experiments primarily suitable for advanced undergraduate physics and chemistry laboratories. Participants gained practical, hands‐on experience in approximately 16 unique laser‐based experiments in atomic and molecular physics, physical chemistry, and biophysics. The wo...

    $25.00

  • JLA Vol:8 Iss:2 (Laser materials processing at Sandia National Laboratories)


    Authors:
    James L. Jellison
    Michael J. Cieslak
    Sandia National Laboratories, Albuquerque, NM 87185, U.S.A.


    This paper describes the laser materials processing capabilities at Sandia National Laboratories. Some of the advances in the understanding of various aspects of laser materials processing which have been made by the laser materials processing team at Sandia are discussed.

    $25.00

  • JLA Vol:3 Iss:1 (Nursing Perspective: Clinical Laser Safety Issues Survey)


    Authors:
    Penny J. Smalley
    Laser Resources & Consulting Services, Chicago, Illinois


    $25.00

  • JLA Vol:18 Iss:1 (Three-dimensional analytical model on laser-powder interaction during laser cladding)


    Authors:
    Yan-Lu Huang
    Jian Liu
    Nai-Heng Ma
    Jian-Guo Li
    School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai, China 200030


    To compute the attenuation of laser power by powder stream and the temperature distribution of the powder particles arriving at different sites on the surface of the workpiece, a three-dimensional analytical model was presented based on Lambert-Beer theorem, Mie’s theory, and heat equilibrium principle. The obtained results revealed that for a given stream spread and speed of powder particles, the laser intensity distribution of laser spot and the temperature distribution of the powder part...

    $25.00

  • JLA Vol:24 Iss:3 (2D longitudinal modeling of heat transfer and fluid flow during multilayered direct laser metal deposition process)


    Authors:
    Simon Morville
    Muriel Carin
    LIMATB, Universite´ de Bretagne-Sud/UEB, Centre de recherche Ch. Huygens, Rue de Saint Maude´, BP 92116, 56321 Lorient cedex, France

    Patrice Peyre
    Myriam Gharbi
    PIMM, UMR 8006 CNRS-Arts et Me´tiers Paris Tech, 151 Boulevard de l’Hoˆpital, 75013 Paris, France

    Denis Carron
    Philippe Le Masson
    LIMATB, Universite´ de Bretagne-Sud/UEB, Centre de recherche Ch. Huygens, Rue de Saint Maude´, BP 92116, 56321 Lorient cedex, France

    Re´my Fabbro
    PIMM, UMR 8006 CNRS-Arts et Me´tiers Paris Tech, 151 Boulevard de l’Ho&ci...

    $25.00

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