ICALEO 2008 Paper #108 (Application and Evaluation Performance of DMS in the SLS Process)
Application and Evaluation Performance of DMS in the SLS Process
Authors:
Dong Soo Kim, Korea Institute of Machinery & Materials; Daejeon South Korea
Sung Woo Bae, Korea Institute of Machinery & Materials; Daejeon South Korea
Kyung Hyun Choi, Cheju National University; Jeju-Si South Korea
Seong Yeon Yoo, Chungnam National University; Daejeon South Korea
Presented at ICALEO 2008
Rapid manufacturing and high accuracy are very important factors in the Selective Laser Sintering (SLS) process, one of Solid Freeform Fabrication (SFF) system due to the life cycle of a product getting shorter. In order to develop more elaborate and speedy system for fabricating o...$28.00
ICALEO 2008 Paper #107 (Mitigation of Porosity in Laser Powder Deposition under Vibratory Condition)
Mitigation of Porosity in Laser Powder Deposition under Vibratory Condition
Authors:
Ehsan Foroozmehr, Center for Laser Aided Manufacturing, Southern Methodist University; Dallas TX USA
Radovan Kovacevic, Center for Laser Aided Manufacturing, Southern Methodist University; Dallas TX USA
Syed Hamid, Halliburton Energy Services; Carrollton TX USA
Presented at ICALEO 2008
Near-net shape fabrication processes, such as laser powder deposition (LPD) have been used as a unique technique in manufacturing components with complex geometry. Improving the quality of the final buildup is still of great interest. In this paper, the effect of in-process vibration on the porosity perc...$28.00
ICALEO 2008 Paper #106 (Laser-assisted Production of Electrical Discharge Machining (EDM) Electrodes: A Comparative Study between Rapid Prototyping by Selective Laser Sintering and Laser Surface Cladding Techniques)
Laser-assisted Production of Electrical Discharge Machining (EDM) Electrodes: A Comparative Study between Rapid Prototyping by Selective Laser Sintering and Laser Surface Cladding Techniques
Authors:
F. Lusquiños, University of Vigo; Vigo Spain
R. Comesaña, University De Vigo; Vigo Spain
J. del Val, University of Vigo; Vigo Spain
V. Ventosinos, Centro Tecnologico De Automocion De Galicia (Ctag); Porrino Spain
R. Vázquez, Centro Tecnologico De Automocion De Galicia (Ctag); Porri�O Spain
A. Riveiro, University of Vigo; Vigo Spain
F. Quintero, University of Vigo; Vigo Spain
H. Santísima-Trinidad, Centro Tecnologico De A...$28.00
ICALEO 2008 Paper #105 (An Investigation on Porosity in Laser Metal Deposition)
An Investigation on Porosity in Laser Metal Deposition
Authors:
Gary K.L. Ng, Simtech; Singapore Singapore
Guijun Bi, Simtech; Singapore Singapore
Hongyu Zheng, Singapore Institute of Manufacturing Technology (Simtech); Singapore Singapore
Presented at ICALEO 2008
Laser metal deposition is a process that involves laser processing of fine metal powders into forming three-dimensional structures. Its versatility offers immense opportunities in numerous applications. However, the deposited material using the powder blown process is often plagued by inherent defects such as porosity which cannot be tolerated in certain applications. The origin of the gas porosity observed i...$28.00
ICALEO 2008 Paper #103 (Process Control on Laser Cladding for Direct Manufacturing: Control of the Width and Height of the Deposited Material by Coaxial Vision)
Process Control on Laser Cladding for Direct Manufacturing: Control of the Width and Height of the Deposited Material by Coaxial Vision
Authors:
Mehdi Guiraud, Gerailp; Arcueil France
Pascal Aubry, CEA / GERAILP; Arcueil France
Remy Fabbro, Gerailp/Lalp; Arcueil France
Presented at ICALEO 2008
In order to generate 3D complex structures by laser cladding, it is necessary to control the width and the height of the deposited material. First, we present a general overview of the problem. The phenomenological model linking the main the process parameters with the output parameters (width and height of the deposited material) is presented. As this model evidences, the proce...$28.00
ICALEO 2008 Paper #102 (Novel Computer Generated Diffractive Optics Modifying Beam Characteristics to Improve the Microstructures of Directly Deposited Inconel 625)
Novel Computer Generated Diffractive Optics Modifying Beam Characteristics to Improve the Microstructures of Directly Deposited Inconel 625
Authors:
John Tyrer, Loughborough University; Loughborough Great Britain
Matthew Gibson, Loughborough University; Loughborough Great Britain
Rebecca Higginson, Loughborough University; Loughborough Great Britain
Presented at ICALEO 2008
A major use of metal additive welding is the repair of damaged or worn turbine blades. Current methods used to produce multiple layer repairs in high nickel content alloys have shown an inability to prevent intergranular cracking and levels of porosity in the deposited material. These problems are c...$28.00
ICALEO 2008 Paper #101 (Morphological and Thermal Modelling of Direct Metal Deposition: Application to Aeronautical Alloys)
Morphological and Thermal Modelling of Direct Metal Deposition: Application to Aeronautical Alloys
Authors:
Patrice Peyre, Lalp-Gerailp, Upr 1578 Cnrs; Arcueil France
Pascal Aubry, Gip-Gerailp; Arcueil France
Ry Fabbro, Lalp-Gerailp, Upr 1578 Cnrs; Arcueil France
Presented at ICALEO 2008
Direct metal deposition (DMD) allows to generate complex structures from the interaction between a projected powder and a laser beam, with or without using a coaxial device. One of the main issues to address concerns the prediction of layer widths and heights from the laser and powder parameters, in order to allow thermal or thermo-mechanical modelling in a second step. Indeed, most...$28.00
ICALEO 2008 Paper #1006 (Study of Phenomenon of Fibre-Laser-Mig/Mag-Hybrid-Welding)
Study of Phenomenon of Fibre-Laser-Mig/Mag-Hybrid-Welding
Authors:
Heidi Piili, Lappeenranta University of Technology; Lappeenranta Finland
Antti Salminen, Lappeenranta University of Technology; Lappeenranta Finland
Petri Harkko, Cavitar Ltd; Tampere Finland
Janne Lehtinen, Cavitar Ltd; Tampere Finland
Presented at ICALEO 2008
The laser hybrid welding processes are widening the field of laser welding applications. They are gaining ever more interest in many sectors of metal industry. There is quite a few successful applications already in use for example in automotive, ship building and construction industry. The current development steps of high power fi...$28.00
ICALEO 2008 Paper #1005 (Distribution of Wire Feeding Elements in Laser-arc Hybrid Welding)
Distribution of Wire Feeding Elements in Laser-arc Hybrid Welding
Authors:
Lin Zhao, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Tomohiro Sugino, National Institute for Materials Science (Present Address:Ihi); Yokohama Japan
Goro Arakane, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Presented at ICALEO 2008
One of the advantages of the laser-arc hybrid welding is to attain the improved microstructure and mechanical property of the weld metal by feeding filler materials. In this case, the alloying elements should be distributed homoge...$28.00
ICALEO 2008 Paper #1004 (Defects and Process Tolerances in Welding of Thick Plates)
Defects and Process Tolerances in Welding of Thick Plates
Authors:
Frank Vollertsen, BIAS; Bremen Germany
Stefan Gruenenwald, Bias; Bremen Germany
Presented at ICALEO 2008
Laser welding and laser-GMA hybrid welding using an 8 kW fiber laser was investigated. Steel plates from low alloyed steel (e. g. pipeline steel X65) having a thickness of 10 mm up to 20.5 mm were joined under various conditions. Single layer laser welding and laser-GMA hybrid welding as well as multi layer hybrid welding were investigated for different seam preparation types. Butt welds and different types of single-V butt welds with broad root face have been tested. The gap and the edge misalignment have been v...$28.00
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