ICALEO 2007 Paper #1706 (Laser Cladding of Al-Si/Sic Composite Coatings: Microstructure and Abrasive Wear Behavior)
Laser Cladding of Al-Si/Sic Composite Coatings: Microstructure and Abrasive Wear Behavior
Authors:
Ramasamy Anandkumar, Instituto Superior Tecnico; Lisboa Portugal
Amelia Almeida, Instituto Superior Tecnico; Lisbon Portugal
Rui Vilar, Instituto Superior Tecnico; Lisboa Portugal
Vaclav Ocelik, University of Groningen; Groningen Netherlands
Jeff De Hosson, University of Groningen; Groningen Netherlands
Presented at ICALEO 2007
Coatings of a composite material consisting of an Al-Si matrix reinforced with SiC particles were produced by laser cladding on cast UNS 356 alloy substrates. The influence of processing parameters on the microstructure an...$28.00
ICALEO 2007 Paper #1707 (Deposition Efficiencies of Laser Cladding with Various Sources)
Deposition Efficiencies of Laser Cladding with Various Sources
Authors:
J.F. Tressler, ARL, The Penn State University; University Park PA USA
Richard Martukanitz, ARL, The Penn State University; State College PA USA
J.H. McDermott, ARL, The Penn State University; University Park PA USA
Presented at ICALEO 2007
This presentation will encompass the results of evaluations on laser cladding experiments measuring deposition rates and energy efficiency for various laser systems. With The ability to efficiency deposit material, regardless of the process, is of extreme importance for many cladding applications. To quantify the efficiency of laser cladding, CO2, Nd:YAG (flas...$28.00
ICALEO 2007 Paper #1708 (A Study of Optimal Laser Parameters by ANOVA Method in Laser Surface Alloyed NiTi with Mo)
A Study of Optimal Laser Parameters by ANOVA Method in Laser Surface Alloyed NiTi with Mo
Authors:
H.C. Man, The Hong Kong Polytechnic University; Kowloon Hong Kong
Ng Ka Wai, The Hong Kong Polytechnic University; Shatin Hong Kong
T.M. Yue, The Hong Kong Polytechnic University; Kowloon Hong Kong
Presented at ICALEO 2007
The present work investigates the influence of process parameters for laser surface alloying with molybdenum on Nickel Titanium, which is extensively used in medical devices industries. A systematic study of process parameters such as laser power, scanning velocity and pre-paste thickness upon the Mo concentration was carried out. Analysis of variance (...$28.00
ICALEO 2007 Paper #1801 (Simulation Based Design of Hybrid Laser Welding Processes)
Simulation Based Design of Hybrid Laser Welding Processes
Authors:
Dave Farson, Ohio State University; Columbus OH USA
MinHyun Cho, OSU; Columbus OH USA
YongChae Lim, OSU; Columbus OH USA
Presented at ICALEO 2007
In this presentation, development of innovative configurations of the hybrid laser + GMA welding process for fatigue-critical welds, high-speed welding and narrow gap welding are described. Fatigue strength, which is often of concern in fabricated steel structures, is strongly related to the final weld shape in the weld toe region. For fatigue critical welding, the hybrid laser beam focus spot was larger than normal (to prevent keyhole formation) and was loca...$28.00
ICALEO 2007 Paper #1803 (Laser Absorption within a Powder Layer and the Numerical Modeling of Heat Transfer during the Laser Cladding Process)
Laser Absorption within a Powder Layer and the Numerical Modeling of Heat Transfer during the Laser Cladding Process
Authors:
Ryan McVey, Engineering Science and Mechanics Department, The Penn State University; State College PA USA
Richard Martukanitz, ARL, The Penn State University; State College PA USA
Shawn Kelly, ARL, The Penn State University; State College PA USA
Presented at ICALEO 2007
In previous experimentation, it has been shown that laser energy incident onto a powder layer is absorbed within the layer; however, when modeling a powder based laser deposition process, it is common practice to assume surface loading only. The current work explores incorporati...$28.00
ICALEO 2007 Paper #1804 (Nd:Yag Laser Absorptance of Rough Metal Surfaces)
Nd:Yag Laser Absorptance of Rough Metal Surfaces
Authors:
David Bergstrom, Mid Sweden University; Ostersund Sweden
John Powell, Laser Expertise Ltd.; Nottingham Great Britain
Alexander F. H. Kaplan, Lulea University of Technology; Lulea Sweden
Presented at ICALEO 2007
The Nd:YLF/Nd:YAG laser absorptance of rough metal surfaces has been investigated using 3D ray tracing simulations on computer-generated Gaussian random rough metal surfaces. The impact of multiple scattering, shadowing and Fresnel-equation based angle dependence on the overall absorption is discussed.$28.00
ICALEO 2007 Paper #1805 (Modeling and Simulation of the Energy Deposition in Laser Beam Welding with Oscillatory Beam Deflection)
Modeling and Simulation of the Energy Deposition in Laser Beam Welding with Oscillatory Beam Deflection
Authors:
Achim Mahrle, TU Dresden / IOF - LOT; Dresden Germany
Eckhard Beyer, IWS Dresden / TU Dresden; Dresden Germany
Presented at ICALEO 2007
In recent years, some promising results about laser beam welding with forced beam oscillation were published. Characteristic feature of this technology is the purposeful beam manipulation by an oscillatory beam deflection in superposition to the commonly uniform and rectilinear feed rate of a conventional laser beam welding process. Due to the increased number of welding variables, the application of oscillation techniques offers manifol...$28.00
ICALEO 2007 Paper #1806 (A Verified Model of Laser Direct Metal Deposition using an Analytical Enthalpy Balance Method)
A Verified Model of Laser Direct Metal Deposition using an Analytical Enthalpy Balance Method
Authors:
Andrew Pinkerton, The University of Manchester; Manchester Great Britain
Kamran Shah, 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
Michael Preuss, The University of Manchester; Manchester Great Britain
Philip Withers, The University of Manchester; Manchester Great Britain
Presented at ICALEO 2007
Analytical modelling of a quasi-stationary laser melt pool without mass addition can be achieve...$28.00
ICALEO 2007 Paper #1808 (A Coupled Time-Dependent Numerical Simulation on Temperature and Stress Fields in Laser Solid Freeform Fabrication Process)
A Coupled Time-Dependent Numerical Simulation on Temperature and Stress Fields in Laser Solid Freeform Fabrication Process
Authors:
Masoud Alimardani, Department of Mechanical and Mechatronics Engineering, University of Waterloo; Waterloo ON Canada
Ehsan Toyserkani, Department of Mechanical and Mechatronics Engineering, University of Waterloo; Waterloo ON Canada
Jan P. Huissoon, Department of Mechanical and Mechatronics Engineering, University of Waterloo; Waterloo ON Canada
Presented at ICALEO 2007
This paper presents a coupled 3D time-dependent numerical approach for modeling laser solid freeform fabrication by which the geometry of the deposited materials, temperatu...$28.00
ICALEO 2007 Paper #1901 (Perimetric Sensor for the Detection and Following of Complex Seam Trajectories in Robotic Laser Welding)
Perimetric Sensor for the Detection and Following of Complex Seam Trajectories in Robotic Laser Welding
Authors:
Dimitrios Iakovou, University of Twente; Enschede Netherlands
Johan Meijer, University of Twente; Enschede Netherlands
Ronald Aarts, Univercity of Twente; Enschede Netherlands
Ben Jonker, University of Twente; Enschede Netherlands
Presented at ICALEO 2007
The use of robotic laser welding is increasing among industrial applications, because of its ability to weld objects in three dimensions. Automatic seam detection and following can be accomplished with the aid of seam detection sensors. The majority of the available sensors apply optical triang...$28.00