ICALEO 2007 Paper #1306 (Modeling of Laser Drilling Considering Multiple Reflection of Laser, Evaporation and Melt Flow)
Modeling of Laser Drilling Considering Multiple Reflection of Laser, Evaporation and Melt Flow
Authors:
Etsuji Ohmura, Osaka University; Suita, Osaka Japan
Satoru Noguchi, Osaka University; Suita Japan
Jay Tu, North Carolina State University; Raleigh NC USA
William Ray Harp, North Carolina State University; Raleigh NC USA
Yoshinori Hirata, Osaka University; Suita Japan
Presented at ICALEO 2007
laser drilling was analyzed by considering multiple reflections and evaporation of material. In the keyhole formation process, the variation of the hole shape and the variation of the absorption of the laser power distribution in the wall were examined....$28.00
ICALEO 2007 Paper #1305 (An Anisotropic Enhanced Thermal Conductivity Approach for Modelling Laser Melt Pools)
An Anisotropic Enhanced Thermal Conductivity Approach for Modelling Laser Melt Pools
Authors:
Shakeel Safdar, The University of Manchester; Manchester Great Britain
Andrew Pinkerton, The University of Manchester; Manchester Great Britain
Richard Moat, The University of Manchester; Manchester Great Britain
Lin Li, The University of Manchester; Manchester Great Britain
Mohammad Sheikh, The University of Manchester; Manchester Great Britain
Michael Preuss, The University of Manchester; Manchester Great Britain
Philip Withers, The University of Manchester; Manchester Great Britain
Presented at ICALEO 2007
It is well estab...$28.00
ICALEO 2007 Paper #1304 (Investigation of Meltpool Characteristics and Correlations during Laser Cladding using a Finite Element Modeling Approach)
Investigation of Meltpool Characteristics and Correlations during Laser Cladding using a Finite Element Modeling Approach
Authors:
Johannes Hofman, Netherlands Institute for Metals Research; Enschede Netherlands
D.F. De Lange, University of Twente; Enschede Netherlands
J. Meijer, University of Twente; Enschede Netherlands
Presented at ICALEO 2007
An important goal in the optimization of the laser cladding process is to reduce the degree of dilution. This dilution depends on process settings like scanning speed, laser power and powder mass rate. To optimize process settings width respect to the dilution, usually an expensive series of experiments is performed. Optimal p...$28.00
ICALEO 2007 Paper #1301 (Simulation of Thermal Stress in Induction-assisted Laser Cladding)
Simulation of Thermal Stress in Induction-assisted Laser Cladding
Authors:
Dietrich Lepski, Fraunhofer IWS Dresden; Dresden Germany
Frank Brückner, Fraunhofer IWS Dresden; Dresden Germany
Eckhard Beyer, Fraunhofer IWS Dresden; TU Dresden LOT / IOF; Dresden Germany
Presented at ICALEO 2007
In laser cladding powder particles of wear and corrosion resistant materials are deposited on the workpiece and melted by the laser beam to get a strong weld joint. High temperature gradients and density changes due to phase transformations arising during cooling are responsible for the evolution of thermal stresses, which even may cause cracks and delamination. This effect becomes m...$28.00
ICALEO 2007 Paper #1206 (New Applications with High Average Power Q-switched Nd:YAG Lasers)
New Applications with High Average Power Q-switched Nd:YAG Lasers
Authors:
Wolfram Rath, Rofin Sinar Laser GmbH; Hamburg Germany
Markus Rütering, Rofin Sinar Laser GmbH; Hamburg Germany
Presented at ICALEO 2007
For many years applications of Q-switched lasers are widely in use like marking, engraving, material removal, drilling cutting etc. The realization of large area processing, however, like cleaning, coating removal and surface modifications is limited for two reasons: First because of the relative low average power of the lasers available so far which can not realize the required processing rates and second because of the limited pulse energy of the available laser sources t...$28.00
ICALEO 2007 Paper #1205 (Influence of Incident Angle on Laser Drilling)
Influence of Incident Angle on Laser Drilling
Authors:
Schneider Matthieu, LALP; arcueil France
Laurent Berthe, LALP; ARCUEIL France
Maryse Muller, LALP; ARCUEIL France
Remy Fabbro, LALP; ARCUEIL France
Presented at ICALEO 2007
Laser drilling is able to use as an industrial process for several tens years. However, inherent factors due to laser source, material properties and dynamic of the process are still making physical understanding very difficult. Moreover mistake on measurements can be made with the established diagnostics, especially for deep holes. This paper deals with the study of holes properties drilled by laser with the HL201P from TRUMPF. It ...$28.00
ICALEO 2007 Paper #1204 (Enhanced Laser Percussion Drilling Modeling Utility)
Enhanced Laser Percussion Drilling Modeling Utility
Authors:
Devdas Shetty, University of Hartford; West Hartford CT USA
Ivana M. Milanovic, University of Hartford; West Hartford CT USA
Tom A. Eppes, University of Hartford; West Hartford CT USA
J. Bornas, University of Hartford; West Hartford CT USA
Presented at ICALEO 2007
The supply chain within the aerospace industry is in the midst of a significant transformation. In decades past, components and assemblies were produced by a few highly vertically integrated companies. Today, the supply chain is disaggregated as components and assemblies are sourced on a global scale from an increasing number of special...$28.00
ICALEO 2007 Paper #1203 (Methods of Employing Lasers in the Production and Repair of Cooling Holes used in the Latest Turbine Engine Designs)
Methods of Employing Lasers in the Production and Repair of Cooling Holes used in the Latest Turbine Engine Designs
Authors:
John Stackhouse, Winbro Group Technologies; Coalville Great Britain
Martin Bull, Winbro Group Technologies; Great Britain
Presented at ICALEO 2007
The latest Turbine Cooling Hole designs employ strategies that maximize engine efficiency in ways that were unheard of just a few years ago. These include randomly spaced and angled cooling holes, that often include fan-shaped exits to provide efficient, diffused cooling, and Thermal Barrier Coating (TBC) of the components surfaces. The challenges that are presented in manufacturing these cooling holes a...$28.00
ICALEO 2007 Paper #1202 (Laser Design Characteristics and Parameter Variables and Their Impact on Percussion Hole Quality)
Laser Design Characteristics and Parameter Variables and Their Impact on Percussion Hole Quality
Authors:
Robert Wright, University of Hartford; West Hartford CT USA
Terri Marsico, Conneticut Center for Advance Technology; East Hartford CT USA
Paul Denney, Conneticut Center for Advance Technology; East Hartford CT USA
Presented at ICALEO 2007
Laser drilling is the primary method for the production of cooling holes in gas turbine engine components. Hole quality, which includes surface debris (its amount and location), hole taper, size, and barreling, is a major factor in determining the success of the cooling holes and therefore the performance of the engine. As the n...$28.00
ICALEO 2007 Paper #1201 (The Influence of Pulse Parameters on the Laser Drilling of Hastelloy X)
The Influence of Pulse Parameters on the Laser Drilling of Hastelloy X
Authors:
Paul Jacobs, LFI, Inc.; Smithfield RI USA
Robin Bright, University of Connecticut Institute of Materials Science; Storrs CT USA
Harris Marcus, University of Connecticut Institute of Materials Science; Storrs CT USA
Mark Aindow, University of Connecticut Institute of Materials Science; Storrs CT USA
Presented at ICALEO 2007
Pulsed laser drilling has recently become of increasing importance to the aerospace industry as a method of creating cooling holes in a variety of high temperature gas turbine engine components. The potential for improved processing speed, accuracy, and repr...$28.00
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