CLOSURE NOTICE: Our office will be closed from October 14 - 19, 2018 in support of our annual ICALEO Conference. Placed orders will be fulfilled on Friday, October 19. If you need assistance, please contact us here as staff will be checking these communications regularly.

Thank you for your understanding.

  • JLA Vol:20 Iss:2 (Design and validation of a hybrid laser/water-jet machining system for brittle materials)


    Authors:
    Dinesh Kalyanasundaram
    Gamal Shehata
    Clayton Neumann
    Pranav Shrotriya
    Pal Molian
    Department of Mechanical Engineering, Laboratory for Lasers, MEMS and Nanotechnology, Iowa State University, Ames, Iowa 50011-2161


    A unique laser/water-jet (LWJ) cutting head has been designed, built, and interfaced with a CO2 laser for cutting and scribing of hard and brittle ceramic materials. Alumina samples were used to validate the effectiveness of the LWJ cutting head in thermal fracture mode. The results were compared with vaporization mode (focused beam) as well as thermal fracture mode (defocused beam) of air-assisted laser c...

    $25.00

  • JLA Vol:25 Iss:3 (Laser processing of nickel–aluminum bronze for improved surface corrosion properties)


    Authors:
    R. Cottam
    T. Barry
    Industrial Laser Applications Laboratory, IRIS, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Victoria 3122, Australia and Defence Materials Technology Centre, Victoria 3122, Australia

    D. McDonald
    Department of Mechanical Engineering, The University of Melbourne, Victoria 3010, Australia and Defence Materials Technology Centre, Victoria 3122, Australia

    H. Li
    Faculty of Engineering, University of Wollongong, New South Wales 2522, Australia and Defence Materials Technology Centre, Victoria 3122, Australia

    D. Edwards
    A. Majumdar
    Defence Science and T...

    $25.00

  • JLA Vol:9 Iss:1 (Laser cladding of Al‐Sn alloy on a mild steel)


    Authors:
    Z. Liu
    J. L. Sun
    W. M. Steen
    K. G. Watkins
    C. Lee
    W. P. Brown



    Direct laser cladding of Al alloy on mild steel produces continuous brittle intermetallic FexAly layers at the interface resulting in weak bonding of the clad and the substrate. To overcome this problem, both Ni and Al were investigated as intermediate coatings. Although a Ni coating with a thickness of 70 μm was successful in eliminating the formation of continuous Al‐Fe intermetallics, the bonding at the Al alloy/Ni interface was not strong enough to survive a bending test. A pure Al coating was found to be a better ...

    $25.00

  • $25.00

  • JLA Vol:14 Iss:2 (Deformation behavior and microstructural changes of a hardened high carbon alloy steel in laser bending)


    Authors:
    K. C. Chan
    J. Liang
    Department of Manufacturing Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong


    In this article, the deformation behavior and microstructure of a hardened high carbon steel in laser bending were examined. A CO2 laser unit (TEM00) was used to bend the samples at different laser powers, scanning velocities, and number of scans. A relatively linear relationship between bending angle and number of scans was obtained at laser powers of 150 and 200 W and at a scanning velocity of 30 mm/s. A threshold heat input of about 3.25 J/mm was observed, below which bending was unlikely to occur. The bending angle was al...

    $25.00

  • JLA Vol:18 Iss:3 (Femtosecond laser bulk micromachining of microfluid channels in poly(methylmethacrylate))


    Authors:
    Dave F. Farson
    Hae Woon Choi
    Department of Industrial, Welding and Systems Engineering, The Ohio State University, Columbus, Ohio 43221

    Chunmeng Lu
    L. James Lee
    Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43221


    Internal channels in a polymer are widely used in biotechnology applications such as DNA stretching and in devices such as micrototal analysis systems and lab on a chip systems. For manufacturing prototype devices, femtosecond pulsed laser energy has been used to implement a convenient direct write bulk-machining process in glass. In this technique, the laser beam is focu...

    $25.00

  • JLA Vol:23 Iss:2 (Experimental investigation of laser shock peening using femtosecond laser pulses)


    Authors:
    Dongkyun Lee
    Elijah Kannatey-Asibu
    Department of Mechanical Engineering, The University of Michigan, Ann Arbor, Michigan 48105-2125


    In this study, the feasibility of laser shock peening using ultrafast laser pulses was experimentally investigated. A top coating of zinc with a water confining layer was applied in the investigation. The zinc coating was used for the thermoprotective effect. A high numerical aperture (NA≅0.5) aspheric lens was used to minimize the optical breakdown of water. Microhardness measurements were made on the top surface of the shock peened specimen and compared with the original material hardness. The results provide useful insight on...

    $25.00

  • JLA Vol:7 Iss:3 (Laser beam surveying, refractive index measurements and the making of a 360° reflection hologram)


    Authors:
    David Foster
    Notre Dame High School, 596 South Second St., San Jose, California 95112, U.S.A.


    Triangulation measurements, using a laser to find the height of a room and of buildings, will be described first. This will be followed by triangulation and laser beam divergence measurements for range finding. The use of a hollow prism to hold liquids, whose refractive indicies are to be found, will then be described. The final topic will describe how a 360° reflection hologram was made at Notre Dame High School, utilizing three lasers and beam spreaders and four lasers and beam spreaders. The 360° hologram, made by a student, will be available for viewing.

    $25.00

  • JLA Vol:16 Iss:4 (Laser assisted cleaning of oxide films on SUS409 stainless steel)


    Authors:
    H. Guo
    Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802

    R. Martukanitz
    Applied Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802

    T. DebRoy
    Department of Materials Science and Engineering, The Pennsylvania State Univeristy, University Park, Pennsylvania 16802


    Laser assisted cleaning of oxide films on SUS409 stainless steel plates was studied both experimentally and theoretically. The highly oxidized surfaces with oxide scales of about 25 μm thickness were irradiated with Q-switched pulsed Nd:yttritium–aluminu...

    $25.00

  • JLA Vol:21 Iss:2 (Partial growth of crack in laser scribing of glass)


    Authors:
    Koji Yamamoto
    Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565–0871, Japan

    Noboru Hasaka
    Hideki Morita
    Mitsuboshi Diamond Industrial Co., Ltd., 1-4-37 Minami-kaneden, Suita, Osaka 564–0044, Japan

    Etsuji Ohmura
    Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565–0871, Japan


    The scribing of glass by a CO2 laser is much more effective compared to the conventional mechanical technology in use because the strength of the cut glass is improved since microcracks and particles along the cut edge are lessened. However, the crack depth of ...

    $25.00

Pages

help desk software

There is currently no content classified with this term.