• ICALEO 2009 Paper #1904 (Effect of Path Planning on Residual Stress Distribution in Laser Powder Deposition Process)

    Effect of Path Planning on Residual Stress Distribution in Laser Powder Deposition Process
    Authors:
    Ehsan Foroozmehr, Southern Methodist University; Dallas TX USA
    Radovan Kovacevic, Rcam-Smu; Dallas TX USA
    Presented at ICALEO 2009

    One of the important parameters in laser powder deposition process is the deposition path pattern that affects final quality of the deposited material. In this study, a finite element method is used to model the thermal and structural behavior of the laser powder deposition process. An area is defined to be covered with AISI H13 powder with three different deposition patterns: one-section, two-section, and three-section. The two-section pattern divides th...

    $28.00

  • ICALEO 2009 Paper #1903 (Effect of Substrate on Temperature Field in Selective Laser Sintering of Metal Powders)

    Effect of Substrate on Temperature Field in Selective Laser Sintering of Metal Powders
    Authors:
    Xianfeng Shen, Institute of Machinery Manufacturing Technology; Mianyang Peoples Republic of China
    Yang Wang, -; -
    Jialin Yang, -; -
    Presented at ICALEO 2009

    Selective laser sintering (SLS) of metal powders is an attractive Rapid Prototyping and Manufacturing (RPM) technology which can be used to produce three-dimensional metal parts directly from a CAD model. In the process, the substrates are commonly used for avoiding the balling effect in powder melting and dislocation of sintered part. A three-dimensional finite element thermal model in SLS of metal powder including t...

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  • ICALEO 2009 Paper #1902 (Effects of Parameters on Surface Roughness of Samples by Selective Laser Melting)

    Effects of Parameters on Surface Roughness of Samples by Selective Laser Melting
    Authors:
    Zemin Wang, Huazhong University of Science and Technology; Wuhan Peoples Republic of China
    Guangxia Chen, Jianghan University; Wuhan, Hubei Province Peoples Republic of China
    Kai Guan, Huazhong University of Science and Technology; Wuhan, Hubei Province Peoples Republic of China
    Changwen Peng, Huazhong University of Science and Technology; Wuhan, Hubei Province Peoples Republic of China
    Xiaoyan Zeng, Huazhong University of Science and Technology; Wuhan, Hubei Province Peoples Republic of China
    Presented at ICALEO 2009

    During fabrications of metal parts by...

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  • ICALEO 2009 Paper #1809 (Microlens Fabrication with Fiber Laser Induced Thermo-Mechanical Plastic Forming Method)

    Microlens Fabrication with Fiber Laser Induced Thermo-Mechanical Plastic Forming Method
    Authors:
    Tao Chen, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
    Tong Wang, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
    Ji-Min Chen, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
    Tie-Chuan Zuo, Institute of Laser EngineeringBeijing University of Technology; Beijing Peoples Republic of China
    Shi-Bing Liu, Institute of Laser Engineering,Beijing University of Technology; Beijing Peoples Republic of China

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  • ICALEO 2009 Paper #1808 (Analysis and Control of Penetration Depth Fluctuations in Single-mode Fiber Laser Welds)

    Analysis and Control of Penetration Depth Fluctuations in Single-mode Fiber Laser Welds
    Authors:
    Yong Chae Lim, The Ohio State University; Columbus OH USA
    Matt Reiter, Ohio State University; Columbus OH USA
    Jungho Cho, Ohio State University; Columbus OH USA
    Dave Farson, The Ohio State University; Columbus OH USA
    M. Mehl, Honeywell FM&T; - USA
    Presented at ICALEO 2009

    Penetration depth fluctuations of single-mode fiber laser welds made with long focal length optics and the affects of sinusoidal laser power modulations were studied. It was found that the welds had a high aspect ratio and were subject to spiking defects. The magnitude of the pene...

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  • ICALEO 2009 Paper #1807 (Qualification of HLAW of HSLA-80 Under Naval Vessel Rules)

    Qualification of HLAW of HSLA-80 Under Naval Vessel Rules
    Authors:
    Paul Blomquist, Applied Thermal Sciences, Inc.; Sanford ME USA
    Carl Chretien, -; -
    Erik Oller, Concurrent Technologies Corp; - USA
    Brian Marx, Concurrent Technologies Corp; - USA
    Presented at ICALEO 2009

    Procedures have been developed for Hybrid Laser Arc Welding (HLAW) of HSLA-80 and approved by the American Bureau of Shipping (ABS) for use in the construction of naval combatant vessels built under Naval Vessel Rules (NVR). This paper discusses problems encountered and solutions generated during the development sequence, especially in achieving satisfactory Charpy V-Notch (CVN) impact pr...

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  • ICALEO 2009 Paper #1806 (Weldability of Austenitic and Dual Phase Stainless Steel on Fiber Laser Welding for Pipe Industry)

    Weldability of Austenitic and Dual Phase Stainless Steel on Fiber Laser Welding for Pipe Industry
    Authors:
    Mok-Young Lee, RIST; Pohang South Korea
    Presented at ICALEO 2009

    Stainless steels were widely used for corrosive environments because they have high corrosion resistant properties. But the price of them was higher compared with carbon steel products, due to high cost of raw materials and low productivity. Laser welding has some advantages over conventional GTA welding process such as high welding speed, narrow bead width, excellent weld performance and saving of filler wire. From making stainless steel tube with laser welding, we reduce the price at the same time increase the quality. The ...

    $28.00

  • ICALEO 2009 Paper #1805 (Prevention of Porosity by Oxygen in Partial Penetration Laser and Laser-GMA Hybrid Welding)

    Prevention of Porosity by Oxygen in Partial Penetration Laser and Laser-GMA Hybrid Welding
    Authors:
    Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
    Lin Zhao, National Institute for Materials Science; Tsukuba Japan
    Goro Arakane, National Institute for Materials Science; Tsukuba Japan
    Tomohiro Sugino, Ihi Corp.; Yokohama Japan
    Presented at ICALEO 2009

    Prevention of the porosity has been attempted in partial penetration laser and laser/arc hybrid welding of heavy section steel plates. Bead on plate welding was carried out on 0.10C-0.30Si-1.33Mn steel (JIS SM490A) using 7 kW fibre laser and pulsed GMA. Laser power modulatio...

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  • ICALEO 2009 Paper #1804 (High-power Fiber Laser Butt Welding of Thick High-strength Steel Plate using Sensing System with Hot Wire)

    High-power Fiber Laser Butt Welding of Thick High-strength Steel Plate using Sensing System with Hot Wire
    Authors:
    Terumasa Onishi, JWRI; Ibaraki City, Osaka Japan
    Masami Mizutani, Jwri; Ibaraki City Japan
    Yousuke Kawahito, Jwri; Ibaraki City Japan
    Seiji Katayama, Jwri; Ibaraki City Japan
    Presented at ICALEO 2009

    Welding of thick high-strength steel plates without preheating or post-heating is expected in many industries. A high-power and high-brightness fiber laser is promising as one of the desirable heat sources for high-speed and deep-penetration welding. However, such a small beam spot has a low gap tolerance for butt welding. In this study, theref...

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  • ICALEO 2009 Paper #1803 (Short Focal Length Scanner,Fiber Laser Welding Of Stainless Steel Sheets And Tubular Products)

    Short Focal Length Scanner,Fiber Laser Welding Of Stainless Steel Sheets And Tubular Products
    Authors:
    Mikko Vänskä, Lappeenranta University of Technology / Outokumpu Stainless Tubular Products Oy Ab; Pietarsaari Finland
    Veli Kujanpää, Lappeenranta University of Technology / VTT Industrial Systems; Lappeenranta Finland
    Elin Westin, Outokumpu Stainless Ab, Avesta Research Center; Avesta Sweden
    Terho Torvinen, Outokumpu Stainless Tubular Products Oy Ab; Pietarsaari Finland
    Presented at ICALEO 2009

    The fiber laser has generally better beam quality than the CO2-laser. This would normally be a positive effect, but also it causes limitations. Welding of join...

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