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ICALEO 2006

201 Products.
Page: 1, 2, 3, 4, 5, 6, 7, 8, 9

ICALEO 2006 Paper #1001 (Laser Cladding of Cu-NbC Nanocomposite Coatings)

ICAL06_1001

Laser Cladding of Cu-NbC Nanocomposite Coatings
Authors:
Amelia Almeida, Instituto Superior Tecnico; Lisboa Portugal
Sonia Eugenio, Instituto Superior Tecnico; Lisboa Portugal
Teresa Marques, INETI-DMTP; Lisboa Portugal
Vanessa Livramento, INETI-DMTP; Lisboa Portugal
Jose Brito Correia, INETI-DMTP; Lisboa Portugal
Rui Vilar, Instituto Superior Tecnico; Lisboa Portugal
Presented at ICALEO 2006

Cu-matrix composites are interesting materials to be used as coatings in applications where efficient heat transfer and good wear resistance are simultaneously necessary, like mould repair, electric sliding contacts, high temperature seals, e...

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ICALEO 2006 Paper #1002 (Laser Cladding of Multiple Track Composite Nicrbsi Coatings)

ICAL06_1002

Laser Cladding of Multiple Track Composite Nicrbsi Coatings
Authors:
Armando Yanez, Universidade da Coruna; Ferrol Spain
Jose Carlos Alvarez, Universidade da Coruña; Ferrol Spain
Jose Manuel Amado, Universidade da Coruña; Ferrol Spain
Maria Tobar, Universidade da Coruña; Ferrol Spain
Presented at ICALEO 2006

NiCrBSi coatings are employed to improve the quality of components submitted to high temperature wear and corrosion. Boron and silicon on its composition lowers the melting point and gives them its self-fluxing character. Hard ceramic particles like tungsten carbides (WC) can be added to increase hardness and abrasive wear resistance of the Ni alloy...

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ICALEO 2006 Paper #1003 (Laser Cladding in Practice of Valuable Products; the Experience of a Laser Cladding Job Shop)

ICAL06_1003

Laser Cladding in Practice of Valuable Products; the Experience of a Laser Cladding Job Shop
Authors:
Willem Husslage, NedClad Technology BV; Hengelo Netherlands
Presented at ICALEO 2006

NedClad Technology BV is a small highly specialised laser clad firm. As a spin off of Twente University (NL) applies corrosion, wear and heat resistant coatings using a 2 kW Nd:YAG-laser and a 9-axis robot based manipulation system. The laser clad layers are applied on both new products and on worn and damaged products, resulting in better products than the originals. The main fields of interest are the process industry, off shore applications, combustion engine parts, energy generating equipment; besides ther...

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ICALEO 2006 Paper #1005 (Improving Laser Cladding Process Conditions by Inducing Skin Effect through High Frequency Magnetic Field)

ICAL06_1005

Improving Laser Cladding Process Conditions by Inducing Skin Effect through High Frequency Magnetic Field
Authors:
Jean Pierre Bergmann, TU Ilmenau; Ilmenau Germany
Johannes Wilden, TU Ilmenau; Ilmenau Germany
Markus Dolles, TU Ilmenau; Ilmenau Germany
Presented at ICALEO 2006

Laser beam cladding represents a technology, which allows high quality coating technique towards other thermal coating processes as for example a good metallic bonding between coating and base material, a fine microstructure and good mechanical properties due to the rapid cooling are reached. Moreover the very small dilution allows ensuring the desired metallurgic properties in for example a one ...

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ICALEO 2006 Paper #1006 (Comparison of Laser Cladding with Powder and Hot and Cold Wire Techniques)

ICAL06_1006

Comparison of Laser Cladding with Powder and Hot and Cold Wire Techniques
Authors:
Janne Nurminen, KETEK; Kokkola Finland
Jouko Riihimäki, Central Ostrobothnian Technology Centre KETEK; Finland
Jonne Näkki, Central Ostrobothnian Technology Centre KETEK; Finland
Petri Vuoristo, KETEK; Finland
Presented at ICALEO 2006

Laser cladding with various methods have been utilized for some years with increasing quantity. Powder has been traditional type of consumable, but some usage of wires has been used as well. There are also a number of cladding reports with preheated wire deposition. The aim has been to increase the low productivity of laser cladding. Th...

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ICALEO 2006 Paper #101 (Analysis of Basic Processes inside the Keyhole during Deep Penetration Nd-Yag CW Laser Welding)

ICAL06_101

Analysis of Basic Processes inside the Keyhole during Deep Penetration Nd-Yag CW Laser Welding
Authors:
Remy Fabbro, LALP (CNRS)/GIP GERAILP; Arcueil Cedex France
Sonia Slimani, Air Liquide-CTAS; St OUEN L'AUMÔNE France
Frederic Coste, LALP (CNRS)/GIP GERAILP; ARCUEIUL France
Francis BRIAND, Air Liquide-CTAS; St OUEN L'AUMÔNE France
Presented at ICALEO 2006

The keyhole geometry in deep penetration laser welding results of the combination of several complex processes and their relative importance is not really established today. Firstly, we will report several results concerning the geometry of the keyhole where its inclination has been determined as a fu...

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ICALEO 2006 Paper #102 (Holographic Diffractive Optical Elements Allow Improvements in Conduction Laser Welding of Steels)

ICAL06_102

Holographic Diffractive Optical Elements Allow Improvements in Conduction Laser Welding of Steels
Authors:
James Kell, Loughborough University; Loughborough, Leics Great Britain
John Tyrer, Loughborough University; Loughborough, Leics Great Britain
Rachel Thomson, Loughborough University; Loughborough, Leics Great Britain
Rebecca Higginson, Loughborough University; Loughborough, Leics Great Britain
Presented at ICALEO 2006

Computer generated holographic elements have been successfully used as a novel beam delivery method in conduction limited laser welding a range of steels using a 1.2kW CO2 laser. An ideal weld zone profile was thermally modelled to pro...

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ICALEO 2006 Paper #103 (The Effect of Welding Parameters on Keyhole Behavior in CO2-Laser Welding)

ICAL06_103

The Effect of Welding Parameters on Keyhole Behavior in CO2-Laser Welding
Authors:
Antti Salminen, Lappeenranta University of Technology; Lappeenranta Finland
Anna Fellman, Lappeenranta University of Technology, Laser processing laboratory; Lappeenranta Finland
Presented at ICALEO 2006

The advantages of laser welding are based on the utilization of so called keyhole, which is a vapor channel generated to base material. The energy of laser beam is brought to the material via the keyhole. There are various mathematical models created explaining the shape and behavior of keyhole during welding. However, the validation of the keyhole behavior against the models is lacking. It is common...

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ICALEO 2006 Paper #104 (Effect of Alloying Elements on Porosity Formation in Laser Welding of Heavy Section Steel Plates)

ICAL06_104

Effect of Alloying Elements on Porosity Formation in Laser Welding of Heavy Section Steel Plates
Authors:
Susumu Tsukamoto, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Goro Arakane, National Institute for Materials Science; Tsukuba, Ibaraki Japan
Kazuhiro Kojima, Nippon Steel; Futtsu, Chiba Japan
Tadayuki Otani, Nippon Steel; Futtsu, Chiba Japan
Shigeru Ohkita, Nippon Steel; Futtsu, Chiba Japan
Presented at ICALEO 2006

Effect of some alloying elements on the porosity formation has been investigated in full penetration laser welding of 12 mm thickness C-Si-Mn steels using a 20 kW CO2 laser. Formation process of the porosit...

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ICALEO 2006 Paper #105 (Avoiding Hot Cracking by Induction Based Change of Thermal Strains during Laser Welding)

ICAL06_105

Avoiding Hot Cracking by Induction Based Change of Thermal Strains during Laser Welding
Authors:
Berndt Brenner, Fraunhofer IWS Dresden; Dresden Germany
Gunther Goebel, Fraunhofer IWS Dresden; Dresden Germany
Presented at ICALEO 2006

Hot cracking in welding is still an unresolved problem for a wide range of materials. Restricting the chemical composition usually helps to reduce this problem, e.g. limiting the sulphur content on steels to very low levels. But for industrial applications such additional restrictions on the material norm are hardly applicable. Furthermore some steels grades like free cutting steels contain additional sulphur which counteracts this approach. Therefore ...

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ICALEO 2006 Paper #106 (Which Laser Process for Steel to Aluminium Joining?)

ICAL06_106

Which Laser Process for Steel to Aluminium Joining?
Authors:
Guillaume Sierra, CEA/DRT/GERAILP and LMGC; Montpellier France
Patrice Peyre, GERAILP/LALP; Arcueil France
David Stuart, GERAILP/LALP; Arcueil France
Frédéric Deschaux-Beaume, LMGC UMR 5508 CNRS; Montpellier France
Gilles Fras, LMGC UMR 5508 CNRS; Montpellier France
Presented at ICALEO 2006

The joining of galvanized -or not- low carbon steel to 6000 aluminium alloys was investigated by Nd:YAG laser process with three different assembling modes : 1) a key-hole mode welding which generates liquid aluminium to liquid steel interaction, 2) a solid steel to liquid aluminium interaction ...

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ICALEO 2006 Paper #107 (Laser Joining of Steel-Aluminum Joints in T Configuration)

ICAL06_107

Laser Joining of Steel-Aluminum Joints in T Configuration
Authors:
Jeroen van Tienhoven, University of Twente; Enschede Netherlands
B. Pathiraj, University of Twente; Enschede Netherlands
J. Meijer, University of Twente; Enschede Netherlands
Presented at ICALEO 2006

A laser joining process employing a Nd:YAG laser source, a cold wire feeder and a six axes robot has been developed to produce steel to aluminum transition joints. To obtain good strength, it is critical to minimize the formation of intermetallic phases at the joint. This has been achieved by a careful manipulation of the laser power and the laser beam position. This enabled the steel to be kept in a solid ...

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ICALEO 2006 Paper #1101 (Fiber Laser Welding of 780MPa High Strength Steel)

ICAL06_1101

Fiber Laser Welding of 780MPa High Strength Steel
Authors:
Zhongjie Liu, Nagoya University; Nagoya Japan
Muneharu Kutsuna, Nagoya University; Nagoya Japan
Guojian Xu, Nagoya University; Nagoya Japan
Presented at ICALEO 2006

A 2kW Ytterbium fiber laser, YLR-2000, was used for welding of 780MPa grade high strength steel-WEL-TEN780RE. The WEL-TEN780RE steel is a kind of heat rolled, fine microstructure low carbon high strength steel used for welded constructions. The effects of defocusing distance, welding speed, shielding gas and its flow rate on cross section bead shape and penetration were studied in continue wave laser beam welding. The effects of frequency and duty c...

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ICALEO 2006 Paper #1104 (Optimization of Parameters for Effective Welding of Aerospace Components)

ICAL06_1104

Optimization of Parameters for Effective Welding of Aerospace Components
Authors:
Devdas Shetty, University of Hartford; West Hartford CT USA
Adil Widaatalla, University of Hartford; West Hartford CT USA
Tom Eppes, University of Hartford; West Hartford CT USA
Presented at ICALEO 2006

Inconel 625 is nickel-based supper alloy used in different jet engines for its high corrosion resistance. Laser welding of combustor part of jet engine to replace the existing procedure is a major area of research and development. The specification of this manufacturing process requires the weld to be hermetic sealed. The use of fiber laser and the study of the effect of laser welding par...

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ICALEO 2006 Paper #1202 (Mechanical Performance of Laser Deposition Repairing of IN 738 on Directionally Solidified Superalloy Blade)

ICAL06_1202

Mechanical Performance of Laser Deposition Repairing of IN 738 on Directionally Solidified Superalloy Blade
Authors:
Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
Xiaofeng Zhu, Tsinghua University; Beijing Peoples Republic of China
Wenjin Liu, Tsinghua University; Beijing Peoples Republic of China
Presented at ICALEO 2006

Development of cost-effective repair and rejuvenation processes for DS supperalloy blades are of great economic and technological meanings due to the high cost of the blades. Laser deposition has been proved to be a promising method to repair supperalloy components especially directionally solidified Ni-based superalloy blades, ...

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ICALEO 2006 Paper #1203 (Direct Manufacturing of Aeronautical Components by Laser Metal Deposition of TI-6AI-4V)

ICAL06_1203

Direct Manufacturing of Aeronautical Components by Laser Metal Deposition of TI-6AI-4V
Authors:
Julie Maisonneuve, Centre des Materiaux - Ecole des Mines de Paris; EVRY France
Bienvenu Yves, Centre des Materiaux; Evry France
Christophe Colin, Centre des Materiaux; Evry France
Aubry Pascal, GIP-Gerailp; Arcueil France
Presented at ICALEO 2006

Profil project concerns direct manufacturing by two additive processes which are laser metal deposition and selective laser sintering. The involved partners are the GIFAS group (DASSAULT AVIATION, MBDA, EUROCOPTER, SNECMA, EADS), School of Mines (Centre des Materiaux) and GIP-Gerailp. During the first year of the proje...

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ICALEO 2006 Paper #1204 (Absorption Coefficient Characterization in Ti-6Al-4V Laser Additive Manufacturing)

ICAL06_1204

Absorption Coefficient Characterization in Ti-6Al-4V Laser Additive Manufacturing
Authors:
Anil Chaudhary, Applied Optimization, Inc.; Dayton OH USA
Matt Keller, Applied Optimization, Inc.; Dayton OH USA
Shawn Kelly, Laser Processing Division, ARL; State College, PA PA USA
Steven Medeiros, Wright Patterson AFB; Dayton OH USA
Presented at ICALEO 2006

In order to accurately model the laser deposition of Ti-6Al-4V aerospace components, the interaction of the laser and metal powder feedstock has been investigated. One of the key modeling parameters, the absorption coefficient of the material, is often unknown for material in powder form. It has been shown tha...

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ICALEO 2006 Paper #1205 (Qualification of Nd:YAG Laser Direct Metal Deposition Techniques for Repair of Nickel Superalloy Components)

ICAL06_1205

Qualification of Nd:YAG Laser Direct Metal Deposition Techniques for Repair of Nickel Superalloy Components
Authors:
A A Lugan, TWI Ltd; Cambridge Great Britain
C Rinaldi, CESI RICERCA SpA; Milano Italy
G B Melton, TWI Ltd; Cambridge Great Britain
Paul Hilton, TWI Ltd.; Great Abington, Cambridge Great Britain
Presented at ICALEO 2006

The high temperature operating components of power utility gas turbines are often made with gamma prime reinforced nickel based superalloys. As a result, there is a very high cost ascociated with the replacement of any parts damaged during service. The economic benefits to be gained by using repair procedures as opposed to rep...

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ICALEO 2006 Paper #1206 (Laser Consolidation of Net-Shape Shells for Flextensional Sonar Projectors)

ICAL06_1206

Laser Consolidation of Net-Shape Shells for Flextensional Sonar Projectors
Authors:
Lijue Xue, National Research Council Canada; London Ontario Canada
Chris Purcell, Defence Research and Development Canada- Atlantic; Dartmouth NS Canada
Presented at ICALEO 2006

Laser consolidation (LC) is a computer-aided manufacturing process that builds a functional net-shape part directly from a CAD model, without the use of moulds or dies. The folded shell projector (FSP) is a compact flextensional underwater sound projector developed by DRDC-Atlantic for low frequency sonar applications. The radiating surface of the FSP is a thin-walled shell of complex shape that challenges conventional manuf...

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ICALEO 2006 Paper #1301 (Applications Review: Materials Processing with Fiber Lasers under 1KW)

ICAL06_1301

Applications Review: Materials Processing with Fiber Lasers under 1KW
Authors:
Vijay Kancharla, IPG Photonics Corporation; Oxford MA USA
Presented at ICALEO 2006

Fiber lasers have been gaining ground rapidly in the recent years for material processing applications. A host of applications currently employed with other laser technologies have shifted focus to this very fast emerging technology. While the technology is being familiarized and accepted in the industry, there is limited data and summary of industrial applications of fiber lasers. In this review, an outline of numerous such applications with ytterbium lasers under 1KW is discussed and case studies are presented. Applications and laser...

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ICALEO 2006 Paper #1302 (High Speed Fiber Laser Welding for Fuel Cell Components)

ICAL06_1302

High Speed Fiber Laser Welding for Fuel Cell Components
Authors:
Stanley Ream, EWI; Columbus OH USA
Presented at ICALEO 2006

As energy independence becomes a more pressing concern in the U.S. and other countries, industry and government fuel cell development efforts have gained momentum. There are several leading fuel cell types and hundreds of specific fuel cell designs. Yet, despite the design diversity, there is a common theme that appears in many systems, specifically the need to join, seal, and/or weld thin, stainless steel components at very high production rates. Fuel cell system components such as bi-polar plates, fuel processors, recuperators, and heat exchangers are all comprised o...

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ICALEO 2006 Paper #1305 (High Average Power, Low Non-linearity Ytterbium Fiber Amplifier using Spectral Compression)

ICAL06_1305

High Average Power, Low Non-linearity Ytterbium Fiber Amplifier using Spectral Compression
Authors:
Yoann Zaouter, Amplitude Systemes; Pessac France
Eric Cormier, University of Bordeaux; Talence France
Pierre Rigail, Amplitude Systemes; Pessac France
Clemens Hoenninger, Amplitude Systemes; Pessac France
Eric Mottay, Amplitude Systemes; Pessac France
Presented at ICALEO 2006

High precision applications, such as micro and nano-machining, waveguide writing, nano-structuring require both moderate energy level, and high average power. We present a high average power fibre amplifier. We report on a Ytterbium doped fiber-based amplifier, delivering u...

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ICALEO 2006 Paper #1401 (A Novel Non-Intrusive Technique for CO2 Laser On-line Beam Monitoring)

ICAL06_1401

A Novel Non-Intrusive Technique for CO2 Laser On-line Beam Monitoring
Authors:
Martin Sparkes, The University Of Cambridge; Cambridge Great Britain
Markus Gross, The University Of Cambridge; Cambridge Great Britain
Edward Pain, The University Of Cambridge; Cambridge Great Britain
William O'Neill, The University Of Cambridge; Cambridge Great Britain
Presented at ICALEO 2006

The measurement of high speed laser beam parameters during processing is a topic that has seen growing attention over the last few years as quality assurance places greater demand on the monitoring of the manufacturing process. The targets for any monitoring system is to be non intrusiv...

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ICALEO 2006 Paper #1402 (Optical Inspection of Laser Drilled Cooling Holes in Jet Engine Blades)

ICAL06_1402

Optical Inspection of Laser Drilled Cooling Holes in Jet Engine Blades
Authors:
Devdas Shetty, University of Hartford; West Hartford CT USA
Nikolai Nazaryan, University of Hartford; West Hartford CT USA
Tom Eppes, University of Hartford; West Hartford CT USA
Claudio Campana, University of Hartford; West Hartford CT USA
Jun Kondo, University of Hartford; West Hartford CT USA
Presented at ICALEO 2006

The need for improved engine efficiency of jet engines has led to changes in the design of combustor turbine blades. To combat and avert turbine blade failure caused by excessive operating temperatures, film cooling has been incorporated into blade ...

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ICALEO 2006 Paper #1403 (Sensing and Experimental Based Modeling of Direct Metal Deposition)

ICAL06_1403

Sensing and Experimental Based Modeling of Direct Metal Deposition
Authors:
Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
Lijun Song, University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2006

This paper presents an experimental investigation on the process dynamics of direct metal deposition. An optical sensing system, including three couple charged device cameras and a two-color pyrometer, is used to monitor molten pool geometry and pool temperature during the deposition process. Molten pool area size and height are obtained by image processing. Auto regressive exogenous models and state space models are implemented to identify the direct metal deposition proces...

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201 Products.
Page: 1, 2, 3, 4, 5, 6, 7, 8, 9

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