• ICALEO 2006 Paper #2003 (Fully Coupled Temperature-Stress Finite Element Analysis for Thermal Stresses in Laser Aided DMD Process)

    Fully Coupled Temperature-Stress Finite Element Analysis for Thermal Stresses in Laser Aided DMD Process
    Authors:
    Joohyun Choi, University of Missouri - Rolla; Rolla MO USA
    Suhash Ghosh, UMR; Rolla MO USA
    Presented at ICALEO 2006

    Despite enormous progress in Laser Aided Direct Metal/Material Deposition (DMD) process many issues concerning the adverse effects of process parameters on the stability of variety of properties and the integrity of microstructure have been reported. Delaminating at substrate-deposition interface and cracking between deposited layers are some of these crucial issues that occur due to excessive stress build-up. Significantly high heating and cooling rates a...

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  • ICALEO 2006 Paper #2004 (Real-Time Prediction of Dilution for Automated Laser Powder Deposition Process)

    Real-Time Prediction of Dilution for Automated Laser Powder Deposition Process
    Authors:
    Alireza Fathi, University of Waterloo; Waterloo ON Canada
    Ehsan Toyserkani, University of Waterloo; Waterloo ON Canada
    Amir Khajepour, University of Waterloo; Waterloo ON Canada
    Presented at ICALEO 2006

    This paper presents a mathematical model of laser powder deposition to predict the dilution. The model validated by experiments is developed using the moving heat source method. In this method, the temperature distribution inside the clad and the substrate is obtained using the superposition principle and the solution of the heat diffusion due to a point heat source. The model predic...

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  • ICALEO 2006 Paper #2005 (Finite Element Analysis of Laser Powder Deposition of Titanium)

    Finite Element Analysis of Laser Powder Deposition of Titanium
    Authors:
    Antonio Crespo, Instituto Superior Tecnico; Lisbon Portugal
    Augusto Deus, Instituto Superior Tecnico ; Lisbon Portugal
    Rui Vilar, Instituto Superior Tecnico; Lisbon Portugal
    Presented at ICALEO 2006

    A three-dimensional finite element thermo-kinetic model was used to study phase transformations in laser melting and laser powder deposition of grade II commercially pure titanium. The model was validated for the case of surface treatment, by matching experimental and modeling results, namely on the location of melting and allotropic transformation isotherms for a range of processing parameters, allowin...

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  • ICALEO 2006 Paper #2006 (Modeling of Geometry and Temperature during Direct Metal Deposition)

    Modeling of Geometry and Temperature during Direct Metal Deposition
    Authors:
    Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
    Xiuli He, University of Michigan; Ann Arbor MI USA
    Presented at ICALEO 2006

    The evolution of temperature and velocity fields during direct metal deposition with coaxial powder injection is simulated using a comprehensive three dimensional model, based on the solution of the equations of mass, momentum, energy conservation and solute transport in the liquid pool. The basic physical phenomena, including heat transfer, phase changes, mass addition, fluid flow and interactions between the laser beam and the coaxial powder flow are considered in the model...

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  • ICALEO 2006 Paper #2007 (On the 3D Modeling of Geometrical Formation in Laser Solid Freeform Fabrication Process)

    On the 3D Modeling of Geometrical Formation in Laser Solid Freeform Fabrication Process
    Authors:
    Ehsan Toyserkani, University of Waterloo; Waterloo ON Canada
    Masoud Alimardani, University of Waterloo; Waterloo ON Canada
    Presented at ICALEO 2006

    This paper presents a 3D transient finite element model of laser solid freeform fabrication (LSFF) process. The proposed model determines the thermal distribution throughout the workpiece as a function of time and process parameters including laser power, traverse speed, and material properties. Based on the thermal analysis, the clad formation is then predicted. In the proposed method, the thermal domain is numerically obtained, assuming th...

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  • ICALEO 2006 Paper #201 (Hard, Wear Resistant Metal Surfaces for Industrial Applications through Laser Powder Deposition)

    Hard, Wear Resistant Metal Surfaces for Industrial Applications through Laser Powder Deposition
    Authors:
    James Sears, South Dakota School of Mines & Technology; Rapid City SD USA
    Aaron Costello, South Dakota School of Mines & Technology; Rapid City SD USA
    Jerrod Roalstad, South Dakota School of Mines & Technology; Rapid City SD USA
    Sudip Bhattacharya, South Dakota School of Mines & Technology; Rapid City SD USA
    Stanley Howard, South Dakota School of Mines & Technology; Rapid City SD USA
    Presented at ICALEO 2006

    Most materials produced today are monolithic structures that are heat treated to perform a particular function. Laser Powder Depositi...

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  • ICALEO 2006 Paper #202 (Laser Deposition of Stainless and Tool Steel on a Copper-Beryllium Alloy for Plastic Injection Mould Improvement)

    Laser Deposition of Stainless and Tool Steel on a Copper-Beryllium Alloy for Plastic Injection Mould Improvement
    Authors:
    Jesus Maria Sampedro, AIDO; Paterna (Valencia) Spain
    Jose Greses, AIDO; Paterna (Valencia) Spain
    Jose Antonio Ramos de Campos, AIDO; Paterna (Valencia) Spain
    Vicent Climent, AIMME; Paterna (Valencia) Spain
    Presented at ICALEO 2006

    In the plastic industry the cycle time for the injection of each piece is fundamental for the profitability of the process. One method to reduce the injection time is to manufacture the moulds with a copper-beryllium (Cu-Be) alloy, providing a unique combination of thermal conductivity (i.e. shorter cycle tim...

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  • ICALEO 2006 Paper #203 (Defining Coating Material for Aluminum Die Casting Molds Using a Laser Cladding Process)

    Defining Coating Material for Aluminum Die Casting Molds Using a Laser Cladding Process
    Authors:
    Jaby Mohammed, ; Louisville KY USA
    Suraj Alexander, University of Louisville; Louisville KY USA
    Presented at ICALEO 2006

    Steel dies often fail prematurely due to metal-fatigue cracking, corrosion, erosion, oxidation, heat checking and soldering, when the dies are exposed to molten metals while operating under cyclic-mechanical stresses, thermal loading, chemical corrosion and thermal fatigue. The objective of this work is to find an "optimal" mold material composition for use in the die casting industry using a direct material deposition process (DMD). DMD is a laser based additive fab...

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  • ICALEO 2006 Paper #204 (Advances in 3D Laser Processing in Mold Technology)

    Advances in 3D Laser Processing in Mold Technology
    Authors:
    Henrikki Pantsar, VTT Industrial Systems; Lappeenranta Finland
    Reino Ruusu, VTT; Espoo Finland
    Petri Laakso, VTT; Lappeenranta Finland
    Anssi Jansson, VTT ; Lappeenranta Finland
    Presented at ICALEO 2006

    Texturing of molds is a normal technique to give plastic products a surface shape which replicates the appearance of leather, wood or similar. Often the decorative features have been done by EDM processing or photochemical etching; both processes which present problems in production times and flexibility. EDM processing requires a numerous set of machined erosion electrodes. Changes to the geometrie...

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  • ICALEO 2006 Paper #205 (Repair of Cemented Carbide Tools Using Laser Cladding)

    Repair of Cemented Carbide Tools Using Laser Cladding
    Authors:
    Christ Prakash Paul, University of Waterloo; Waterloo ON Canada
    Christ Prakash Paul, University of Waterloo; Waterloo ON Canada
    Ehsan Toyserkani, University of Waterloo; Waterloo ON Canada
    Seyed Hamidreja Alemohammad, University of Waterloo; Waterloo ON Canada
    Amir Khajepour, University of Waterloo; Waterloo ON Canada
    Stephen Corbin, University of Waterloo; Waterloo ON Canada
    Presented at ICALEO 2006

    This paper reports the laser cladding of various compositions of the Tungsten carbide (WC) and Cobalt (Co) for tool repair and refurbishing applications. The engineered co...

    $28.00

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