• JLA Vol:23 Iss:1 (Optimal process parameters for thermoplastic polyetheretherketone joints fabricated using transmission laser welding and Lumogen<sup>&reg;</sup> IR absorptive pigment)


    Authors:
    Negin Amanat
    School of Physics, University of Sydney, New South Wales 2006, Australia and Cochlear Ltd., 14 Mars Rd., Lane Cove, New South Wales 2066, Australia

    Cedric Chaminade
    John Grace
    Raymax Applications, P.O. Box 958, Newport Beach, New South Wales 2106, Australia

    Natalie L. James
    Cochlear Ltd., 14 Mars Rd., Lane Cove, New South Wales 2066, Australia

    David R. McKenzie
    School of Physics, University of Sydney, New South Wales 2006, Australia


    This study investigates the effects of the process parameters (laser power and irradiation time) on the bond quality of transmission laser welded polyether...

    $25.00

  • JLA Vol:7 Iss:2 (A study of polarization&hyphen;maintaining fiber characteristics with applications to force and displacement sensing)


    Authors:
    P. V. P. Yupapin
    K. Weir
    K. T. V. Grattan
    A. W. Palmer



    An experimental investigation of three different types of highly birefringent fiber sensor element configured as a force and a displacement sensor is described. From the coupling of power between the two eigenmodes, the magnitude of the force and the position of the coupling point can then be determined using ‘white&hyphen;light interferometric’ techniques.

    $25.00

  • JLA Vol:14 Iss:1 (Cutting of slate tiles by CO<sub>2</sub> laser)


    Authors:
    M. Boutinguiza
    F. Lusquin˜os
    J. Pou
    R. Soto
    F. Quintero
    M. Pe´rez-Amor
    Departamento Fı´sica Aplicada Universidade de Vigo, Lagoas Marcosende 9, E-36200 VIGO, Spain

    K. Watkins
    Laser Engineering Group, Department of Engineering, The University of Liverpool, Liverpool L69 3GH, United Kingdom


    Slate is a natural stone which has the characteristic that shows a well-developed defoliation plane, allowing to easily split it in plates parallel to that plane which are particularly used as tiles for roof building. At present, the manufacturing of slate is mostly manual, bein...

    $25.00

  • JLA Vol:18 Iss:2 (Investigation of the effects of nonconventional beam geometries in laser surface treatment of ceramics: Theoretical analysis)


    Authors:
    D. Triantafyllidis
    Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M60 1QD, United Kingdom and Corrosion and Protection Centre, School of Materials, The University of Manchester, Manchester M60 IQD, United Kingdom

    L. Li
    Laser Processing Research Center, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M60 1QD, United Kingdom

    F. H. Stott
    Corrosion and Protection Centre, School of Materials, The University of Manchester, Manchester M60 1QD, United Kingdom


    Laser surface treatment of ceramics by melting and re...

    $25.00

  • JLA Vol:9 Iss:5 (Experimental development of a machining database for the CO<sub>2</sub> laser cutting of ceramic tile)


    Authors:
    S. A. J. Livingstone
    K. L. Chua
    I. Black
    Department of Mechanical and Chemical Engineering, Heriot&hyphen;Watt University, Riccarton, Edinburgh EH14 4AS, U.K.


    This paper covers the cutting of commercially&hyphen;available ceramic tiles using a CO2 laser cutting machine, with the object of producing a laser beam machining database which contains the essential parameter information for their successful processing. Various laser cutting parameters were investigated that would generate a cut in ceramic tile which required minimal posttreatment. The effects of various shield gases, multipass cutting and underwater cutting were also examined.

    $25.00

  • JLA Vol:3 Iss:3 (Fusion Zone Structures in Laser Welded Al&hyphen;SiC Composites)


    Authors:
    Mary H. McCay
    T. Dwayne McCay
    Narendra B. Dahotre
    C. Michael Sharp
    Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, Tennessee 37388


    Metal matrix composites continue to be desirable structural materials but difficulties in joining limit their usefulness. This paper describes the results of a study on the laser welding of A356&hyphen;AI/SiC particulate composites. Three separate processing regimes are identified based upon analytical model predictions and metallographic analysis of the solidification structures.

    $25.00

  • JLA Vol:16 Iss:3 (A procedure for the estimation of intrabeam hazard distances and optical density requirements under the ANSI Z136.1-2000 Standard)


    Authors:
    Robert J. Thomas
    Benjamin A. Rockwell
    Air Force Research Laboratory, Brooks AFB, Texas 78235-5215

    Wesley J. Marshall
    USACHPPM, Aberdeen Proving Ground, Maryland 21010-5422

    Robert C. Aldrich
    Mary F. Gorschboth
    Sheldon A. Zimmerman
    Dahlgren Division, Naval Surface Warfare Center, Dahlgren, Virginia 22448-5100

    R. James Rockwell
    Rockwell Laser Industries, Cincinnati, Ohio 45243


    Over the past few years, a comprehensive rewrite of the American National Standard for Safe Use of Lasers (ANSI Z136.1) has been conducted [American National Standards Institute, Z136.1-2000 America...

    $25.00

  • JLA Vol:21 Iss:1 (Enhancing dual phase steel formability by diode laser heat treatment)


    Authors:
    Edoardo Capello
    Barbara Previtali
    Politecnico di Milano, Dipartimento di Meccanica Via La Masa 1, I-20156 Milan, Italy


    This paper studies the effect of different typologies of surface treatment by diode laser on the local formability of dual phase steel. An analytical thermal model allowed the temperature and cooling rate curves to be predicted and used to select the process parameter conditions. Microhardness measurements, microstructure observations, mechanical tensile test, and Erichsen cup test allowed the positive effect of the heat treatment on dual phase steel formability to be quantified.

    $25.00

  • JLA Vol:25 Iss:3 (Surface tension stabilized laser welding (donut laser welding)&mdash;A new laser welding technique)


    Authors:
    Peter Haglund
    Department of Engineering Sciences and Mathematics, Luleå University of Technology and Westinghouse Electric Sweden AB, SE-721 63 Va¨sterås, Sweden

    Ingemar Eriksson
    John Powell
    Alexander Kaplan
    Department of Engineering Sciences and Mathematics, Luleå University of Technology


    A new laser welding process is presented which delivers a porosity free, spatter free weld. The process involves a donut shaped melt with a central hole of the same order of magnitude as the material thickness. The laser illuminates only the leading section of this melt. The hole is kept open by the melt surface tension.

    $25.00

  • JLA Vol:24 Iss:1 (Silicon(IV) phthalocyanine-loaded-nanoparticles for application in photodynamic process)


    Authors:
    Andreza Ribeiro Simioni
    Fernando L. Primo
    Antonio Claudio Tedesco
    Array


    The aim of this study was to evaluate the potential application of biodegradable nanoparticles containing a photosensitizer in photodynamic therapy. The poly (D,L lactic-co-glycolic acid) nanoparticles were studied by steady-state techniques, time-resolved fluorescence, and laser flash photolysis. The external morphology of the nanoparticles was established by scanning electron microscopy, and the biological activity was evaluated by in vitro cell culture by 3-(4,5 dimethyl-thiazol-2,5 biphenyl) tetrazolium bromide assay. The particles were spherical in shape exhibiting ...

    $25.00

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