• ICALEO 2011 Paper #601 (Laser Penetration Brazing of Dissimilar Alloys)

    Laser Penetration Brazing of Dissimilar Alloys
    Authors:
    Rongshi Xiao, Beijing University of Technology; - Peoples Republic of China
    Peng Dong, Beijing University of Technology; Beijing Peoples Republic of China
    Presented at ICALEO 2011

    The requirements on light-weight structure, structure-function integration and low-cost manufacturing have brought in a rising interest in joining of dissimilar alloys. To join the dissimilar alloys with considerable difference in melting point and metallurgical properties, an approach, namely laser penetration brazing (LPB), has been proposed. The substrate with lower melting point is penetratingly melted by the focused laser beam, and the melted me...

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  • ICALEO 2011 Paper #602 (Laser Autogenous Brazing - A New Method for Joining Dissimilar Metals)

    Laser Autogenous Brazing – A New Method for Joining Dissimilar Metals
    Authors:
    Gen Satoh, Columbia University; New York NY USA
    Y. Lawrence Yao, Columbia University; New York NY USA
    Presented at ICALEO 2011

    The joining of dissimilar metals is a critical process for the future development and evolution of medical devices which would enable the selective use of the unique properties exhibited by biocompatible materials such as stainless steel and titanium, as well as shape memory materials such as NiTi to locally tailor the properties of implantable medical devices. Many joints between dissimilar metals, however, suffer from significant intermetallic formation which causes them to f...

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  • ICALEO 2011 Paper #603 (Study on Laser Brazing Characteristics of Dissimilar Metals)

    Study on Laser Brazing Characteristics of Dissimilar Metals
    Authors:
    SookHwan Kim, Research Institute of Industrial Science of Technology; Pohang South Korea
    Y. Norman Zhou, University of Waterloo; Waterloo Canada
    Mok Young Lee, Research Institute of Industrial Science of Technology; Pohang South Korea
    LiQun Li, Harbin Institute of Technology; Harbin Peoples Republic of China
    Ali Nasiri, University of Waterloo; -
    Presented at ICALEO 2011

    Laser brazing between commercially Al coated steel and Mg alloy(AZ31) has been carried out in the Mg-based and Al-based insert metals.
    The brazing bonds have been evaluated using light microscopy, micro hard...

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  • ICALEO 2011 Paper #604 (Recent Developments in Laser Joining of Dissimilar Materials)

    Recent Developments in Laser Joining of Dissimilar Materials
    Authors:
    Claus Thomy, BIAS- Bremer Institut fur Agewandte Strahltechnik GmbH; Bremen Germany
    Frank Vollertsen, BIAS- Bremer Institut fur Agewandte Strahltechnik GmbH; Bremen Germany
    Presented at ICALEO 2011

    Currently, the use of hybrid structural elements from dissimilar materials is intensively discussed. Primary aim is to reduce weight and maintain or increase mechanical properties and structural performance. In special, the joining of aluminium to steel is of particular interest for the transportation industries such as car production or shipbuilding. So far, a wide variety of laser- and arc-based processes was investi...

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  • ICALEO 2011 Paper #605 (Application of Keyhole and Heat-Conduction Modes to Laser Dissimilar Metals Welding of Magnesium Alloy and Steel)

    Application of Keyhole and Heat-Conduction Modes to Laser Dissimilar Metals Welding of Magnesium Alloy and Steel
    Authors:
    Mohamed Wahba, Osaka University; Osaka Japan
    Yousuke Kawahito, Joining and Welding Research Institute; Ibaraki, Osaka Japan
    Seiji Katayama, Joining and Welding Research Institute; Ibaraki, Osaka Japan
    Presented at ICALEO 2011

    Reduction in vehicles weight has become an urgent need due to environmental and economic concerns. One efficient strategy to answer this need is the use of light weight materials such as magnesium alloys in the manufacturing of vehicles components. But this would necessitate the development of reliable welding techniques to fab...

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  • ICALEO 2011 Paper #606 (Dissimilar Metal Joining of Magnesium Alloy to Zinc-Coated Steel by Laser Welding-Brazing Process)

    Dissimilar Metal Joining of Magnesium Alloy to Zinc-Coated Steel by Laser Welding-Brazing Process
    Authors:
    Liqun Li, Harbin Institute of Technology; Harbin Peoples Republic of China
    Caiwang Tan, Harbin Institute of Technology; Harbin Peoples Republic of China
    Yanbin Chen, Harbin Institute of Technology; Harbin Peoples Republic of China
    Presented at ICALEO 2011

    In automobile industry, there is a strong driving force for reducing the weight of car body by using hybrid structural body parts for improving fuel efficiency and decreasing air pollution. As one of solutions, the dissimilar combination of magnesium alloy and steel tends to be effective for the car body to save ...

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  • ICALEO 2011 Paper #701 (Modeling of Real Temporally Variant Beam Shapes in Laser Materials Processing)

    Modeling of Real Temporally Variant Beam Shapes in Laser Materials Processing
    Authors:
    Jonathan Griffiths, University of Liverpool; Liverpool Great Britain
    Stuart P. Edwardson, University of Liverpool; Liverpool Great Britain
    Geoff Dearden, University of Liverpool; Liverpool Great Britain
    Ken G. Watkins, University of Liverpool; Liverpool Great Britain
    Presented at ICALEO 2011

    The ability to incorporate real, temporally variant intensity distributions is key to improving the accuracy of Finite Element (FE) models of laser processes. The work presented in this paper uses Laser Forming as a process example. Laser forming (LF) offers the industrial promise of...

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  • ICALEO 2011 Paper #702 (Numerical Simulation of Heat Transfer and Fluid Flow During Laser Metal Wire Deposition)

    Numerical Simulation of Heat Transfer and Fluid Flow During Laser Metal Wire Deposition
    Authors:
    Marcus Edstorp, University West; TrollhäTtan Sweden
    Presented at ICALEO 2011

    The object of the research project on which the following article reports, is to develop a numerical simulation model which predicts the geometry of a component manufactured by robotized laser metal wire deposition (RLMwD). These simulations are meant to assist in process planning and optimization. The work is carried out under the assumption that the flow of liquid metal exercises a significant influence on the shape of each bead, and thus also on the entire deposit.

    Here we present a 3D time dynamic finite element mod...

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  • ICALEO 2011 Paper #707 (Contribution on Modelling the Remote Ablation Cutting)

    Contribution on Modelling the Remote Ablation Cutting
    Authors:
    Jan Musiol, Institute for Machine Tools and Industrial Management (iwb); Garching Germany
    Markus Schweier, PRESENTER ONLY; -
    Miachael Zeah, Institute for Machine Tools and Industrial Management (iwb); Garching Germany
    Matthias Guertler, Technische Universitaet Muenchen (TUM); Garching Germany
    Presented at ICALEO 2011

    Remote Ablation Cutting (RAC) with continuous wave lasers holds a lot of untapped potential for laser material processing. High speed cutting for thin metal sheets and foils as well as box or tube processing without inside spatter contamination are only two benefits. In order to d...

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  • ICALEO 2011 Paper #708 (A CFD Model of Laser Cladding: From Deposition Head to Melt Pool Dynamics)

    A CFD Model of Laser Cladding: From Deposition Head to Melt Pool Dynamics
    Authors:
    Juansethi Ibarra-Medina, The University of Manchester; Manchester Great Britain
    Michael Vogel, The University of Manchester; Manchester Great Britain
    Andrew J Pinkerton, The University of Manchester; Manchester Great Britain
    Presented at ICALEO 2011

    The laser metal deposition process continues to receive attention from researchers and industry due to its unique capabilities in applications such as surface coating or rapid manufacture. The development of numerical models has proven useful for improving the process. But nonetheless, most models have focused on analysing individual stages o...

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