• ICALEO 2011 Paper #1707 (Laser Direct Deposition of Nickel-Based Metal Matrix Composite)

    Laser Direct Deposition of Nickel-Based Metal Matrix Composite
    Authors:
    Kevin C. Schoeffel, Purdue University; West Lafayette IN USA
    Yung C. Shin, Purdue University; W. Lafayette IN USA
    Presented at ICALEO 2011

    In the present work, laser direct deposition is used to build multi-layer structures of nickel-based alloy IN690 reinforced with titanium carbide particles at 5-25 percent by volume. This study shows the effects of various operation parameters including the initial weight ratio of matrix and reinforcement powders. The relationship between final TiC volume fraction in the depositions and TiC volume fraction in the initial powder mixture shows good retention of carbide part...

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  • ICALEO 2011 Paper #1708 (Laser Cladding of Zr60Ti6Cu19Fe5Al10 Amorphous Alloy on AZ31B Magnesium Alloy)

    Laser Cladding of Zr60Ti6Cu19Fe5Al10 Amorphous Alloy on AZ31B Magnesium Alloy
    Authors:
    Sen Yang, Nanjing University of Scinece and Technology; Nanjing Peoples Republic of China
    Xue Liu, Nanjing University of Scinece and Technology; Nanjing Peoples Republic of China
    Presented at ICALEO 2011

    High corrosion rate in physiological environment of body is the major drawback of magnesium alloys for their application as biodegradable orthopedic implants. Bulk metallic glasses (BMGs) are relative newcomers in the field of biomaterials but they exhibit an excellent biocompatibility such as Zr60Ti6Cu19Fe5Al10 BMGs. The aim of this presentation is to deposit Zr60Ti6Cu19Fe5Al10 amorphous layer o...

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  • ICALEO 2011 Paper #1709 (Influence of Powder Characteristics in Additive Laser Manufacturing of SS 316L Metallic Parts)

    Influence of Powder Characteristics in Additive Laser Manufacturing of SS 316L Metallic Parts
    Authors:
    Didier Boisselier, IREPA LASER; Illkirch France
    Simon Sankaré, IREPA LASER; Illkirch France
    Presented at ICALEO 2011

    Laser direct metal deposition (LDMD) is a rapid manufacturing technique, with high potential for development, from new part construction to worn or defective part repair, with various metallic alloys. Thanks to their long experience in the field of laser cladding, IREPA LASER has developed specific tools adapted to the rapid manufacturing of metallic parts based on their patented coaxial powder cladding nozzle.
    The process is well developed, but depends on numerou...

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  • ICALEO 2011 Paper #1710 (COAXID Omni-Directional Inner Diameter Laser Cladding Optic)

    COAXID Omni-Directional Inner Diameter Laser Cladding Optic
    Authors:
    Frank Kubisch, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
    Steffen Nowotny, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
    Christoph Leyens, University of Technology; Dresden
    Eckhard Beyer, University of Technology; -
    Anja Techel, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
    Presented at ICALEO 2011

    Laser ID materials deposition is applied for inner surface coatings of abrasively loaded tools, the generative fabrication of inner 3D structures of aero engines and gas turbines as well as the repair o...

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  • ICALEO 2011 Paper #1802 (Reference Process for Determination of Thermal Focus Shift)

    Reference Process for Determination of Thermal Focus Shift
    Authors:
    Axel Hess, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
    Rudolf Weber, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
    Thomas Graf, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
    Marcel Schaefer, Manz AG; Stuttgart Germany
    Christiane Thiel, Institut fur Strachlwekzeuge (IFSW); Stuttgart Germany
    Presented at ICALEO 2011

    High average laser power very often causes thermal beam distortion inside the transmitted optical components. This effect is very pronounced in contaminated optics. It results in a significant decrease of the beam quality and a decrease o...

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  • ICALEO 2011 Paper #1803 (Thermal Management to Reduce Focus Shift Using ZnS Ms Optics)

    Thermal Management to Reduce Focus Shift Using ZnS Ms Optics
    Authors:
    Stephen Rummel, II-VI Infrared; Saxonburg PA USA
    Gary Herrit, II-Vi Infrared; Saxonburg PA USA
    Alan Hedges, II-Vi Infrared; Saxonburg PA USA
    Fred Kropf, II-Vi Infrared; Saxonburg PA USA
    Presented at ICALEO 2011

    Focus shift or thermal lensing is one of the key factors when determining the quality of a cutting or welding head. High power CO2 laser industry cutting heads evolved over time to produce focused beams with a minimum of thermal lensing. One of the key lens parameters that determine thermal lensing produced by a focusing lens is the lens materials thermal conductivity. CO2 OEM sys...

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  • ICALEO 2011 Paper #1805 (Thermal Lensing Measurement of a Thermal Lens Compensation High Power Laser Objective)

    Thermal Lensing Measurement of a Thermal Lens Compensation High Power Laser Objective
    Authors:
    Michael Scaggs, Neoteric Concepts, LLC; Weston FL USA
    Gilbert Haas, Haas Laser Technologies, Inc.; Flanders NJ USA
    Presented at ICALEO 2011

    An effort was under taken to mitigate thermal lensing and have an easy and compact means of monitoring thermal lensing in a high power laser system. Utilizing the negative temperature coefficient refractive index of CaF2 with the nearly opposing positive temperature coefficient refractive index of SiO2, a multi-element focusing objective was fabricated to reduce the amount of thermal lensing experienced with a multi-kilowatt, cw fiber laser. In addi...

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  • ICALEO 2011 Paper #1807 (High Power Disk Lasers - Advances & Applications)

    High Power Disk Lasers – Advances & Applications
    Authors:
    David Havrilla, TRUMPF, Inc.; Plymouth MI USA
    Tracey Ryba, TRUMPF, Inc.; Plymouth MI USA
    Marco Holzer, TRUMPF Laser and Systems GmbH; Ditzingen Germany
    Presented at ICALEO 2011

    Though the genesis of the disk laser concept dates to the early 90’s, the disk laser continues to demonstrate the flexibility and the certain future of a breakthrough technology. On-going increases in power per disk, and improvements in beam quality and efficiency continue to validate the genius of the disk laser concept. As of today, the disk principle has not reached any fundamental limits regarding output power per disk or beam q...

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  • ICALEO 2011 Paper #1808 (Wavelength Dependency in High Power Laser Cutting & Welding)

    Wavelength Dependency in High Power Laser Cutting & Welding
    Authors:
    David Havrilla, TRUMPF, Inc.; Plymouth MI USA
    Stephan Ziermann, TRUMPF, Inc.; Plymouth MI USA
    Marco Holzer, TRUMPF Laser and Systemtechnik GmbH; -
    Presented at ICALEO 2011

    Laser cutting and welding have been around for more than 30 years. Within those three decades there has never been a greater variety of high power laser types and wavelengths to choose from than there is today. There are many considerations when choosing the right laser for any given application capital investment, cost of ownership, footprint, serviceability, along with a myriad of other commercial & economic considerations....

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  • ICALEO 2011 Paper #1809 (An Efficient Method for Enhancing the Filling Factor of the Aperture for Coherent-Beaming-Combining (CBC) using Thin-Film Coated Glass)

    An Efficient Method for Enhancing the Filling Factor of the Aperture for Coherent-Beaming-Combining (CBC) using Thin-Film Coated Glass
    Authors:
    Si-si Zhao, Beijing University of Technology; Beijing Peoples Republic of China
    Zheng-yu Ye, Beijing University of Technology; Beijing Peoples Republic of China
    Zhi-yong Wang, Beijing University of Technology; Beijing Peoples Republic of China
    Presented at ICALEO 2011

    Aperture technology, which influences the combining efficiency, is the key factor for Coherent-Beam-Combining (CBC). By using beam combiner with high performances, coherent combining of fiber lasers can provide the chance to increase the output intensity more effi...

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