ICALEO 2008 Paper #2107 (Studies of Thermal Distortion and Residual Stresses of an Inconel 718 Part Fabricated by the Laser Powder Deposition Process)
Studies of Thermal Distortion and Residual Stresses of an Inconel 718 Part Fabricated by the Laser Powder Deposition Process
Authors:
Huan Qi, Ge Global Research; Schenectady NY USA
Byungwoo Lee, Ge Global Research Center; Niskayuna NY USA
Yan Gao, Ge Global Research Center; Niskayuna NY USA
Magdi Azer, Ge Global Research; Niskayuna NY USA
Presented at ICALEO 2008
Laser powder deposition is essentially a thermal process involving rapid phase changes and high temperature gradients. Thermal stresses generated during rapid cooling have critical impacts on the geometric accuracy and material properties of a laser deposited part. Thermal control is critical for...$28.00
ICALEO 2008 Paper #2106 (Laser Net Shape Manufacturing of Rene195)
Laser Net Shape Manufacturing of Rene195
Authors:
Yong Liu, GE; 0 CO Peoples Republic of China
Presented at ICALEO 2008
Rene 195 is a nickel-based superalloy that was used as the advanced tip material of the high pressure turbine blades of aircraft engines because of its excellent oxidation resistance. However, due to poor weldability of this material, it's very difficult to acquire crack free Rene 195 tip through laser powder deposition. In this paper, Laser Net Shape Manufacturing (LNSM) has been applied for Rene 195 deposition. The key processing parameters were correlated with solidification microstructure and optimized process window was obtained for crack free deposition.
In order to imp...$28.00
ICALEO 2008 Paper #2104 (Investigation of Out-of-Position, Wire-based Cladding)
Investigation of Out-of-Position, Wire-based Cladding
Authors:
Edward W. Reutzel, ARL, The Penn State University; State College PA USA
Stephen W. Brown, Arl Penn State; State College PA USA
Presented at ICALEO 2008
Costs to repair damaged, worn, or corroded metal components, such as valves and other cylindrical bodies, may be reduced if the repairs are performed in the field. In many cases, clad repairs must be realized in non-standard positions and in tight quarters. Additionally, in many cases the repair cannot utilize a powder-based clad process due to fear of contamination of adjacent components. Experiments have been conducted investigating the effects of various process pa...$28.00
ICALEO 2008 Paper #2103 (Modelling of Residual Stress Generation in the Laser Cladding of Extended Areas)
Modelling of Residual Stress Generation in the Laser Cladding of Extended Areas
Authors:
A. Suárez, Universidade Da Coruna; Ferrol - a Coruna Spain
A. Yáñez, Universidade da Coruna; Ferrol Spain
M.J. Tobar, Universidade Da Coruna; Ferrol Spain
Presented at ICALEO 2008
In the development of protective alloy layers by laser cladding residual stresses can lead to final cracking of the deposited coating and a certain mechanical deformation of the processed part. These stresses are of thermal nature and result from the very high thermal gradients and solidification rates associated to the laser heat treatments. A numerical model based on a thermo-mechanical finite elemen...$28.00
ICALEO 2008 Paper #2101 (Production of Low-friction Coatings by Laser Cladding)
Production of Low-friction Coatings by Laser Cladding
Authors:
M. Rombouts, Vito; Mol Belgium
A. Vanhulsel, Vito; Mol Belgium
A. Komp, Freudenberg Forschungsdienste Kg; Weinheim Germany
J. Gedopt, Vito; Mol Belgium
W. Engelen, Vito; Mol Belgium
R. Persoons, Vito; Mol Belgium
Presented at ICALEO 2008
Elastomers are characterized by a high dry sliding friction, which forces the use of lubrication in dynamic sealing and sliding systems. An important driving factor for new developments in the field of surface treatment are environmental considerations concerning the effects of grease and lubricants. The subject of this study is the p...$28.00
ICALEO 2008 Paper #209 (High Brightness Laser Beam Delivery Systems)
High Brightness Laser Beam Delivery Systems
Authors:
Bjoern Wedel, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
Gunnar Koehler, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
Roman Niedrig, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
Martin Daniels, Highyag Lasertechnologie Gmbh; Stahnsdorf Germany
Presented at ICALEO 2008
TBA$28.00
ICALEO 2008 Paper #208 (A Novel Active Laser Safety Shield)
A Novel Active Laser Safety Shield
Authors:
Stefan Kuehn, Fraunhofer IWS Dresden; Dresden Germany
Jan Hannweber, Fraunhofer IWS Dresden; Dresden Germany
Berndt Brenner, Fraunhofer IWS Dresden; Dresden Germany
Eckhard Beyer, Fraunhofer IWS Dresden; Dresden Germany
Presented at ICALEO 2008
New high power lasers with excellent beam parameter products like Fibre- and Disk lasers offer not only new possibilities with material processing. They make also high demands on laser safety. Conventional laser protection systems are passive systems made of massive shields or housings which resist the direct or indirect laser radiation for a specified time. The operator h...$28.00
ICALEO 2008 Paper #207 (Manufacturing Engineering: Practical Laser Safety for Industrial Robots and High Powered Lasers)
Manufacturing Engineering: Practical Laser Safety for Industrial Robots and High Powered Lasers
Authors:
Thomas Lieb, L*A*I International; Elk Grove CA USA
Presented at ICALEO 2008
Whether in the lab or the manufacturing floor there are several hazards associated with laser end-effectors which are manipulated by robots (5-axis motion systems). Some of these hazards, are, of course more obvious. But there are also risks which may be more subtle, yet not unheard of. Robot software, although improving, is still subject to going berserk. Containment systems, unless properly designed, can exacerbate as many problems as they are intended to mitigate. Recent use of high powered Fiber Lasers...$28.00
ICALEO 2008 Paper #206 (The Relevance of Brightness for High Power Laser Cutting and Welding)
The Relevance of Brightness for High Power Laser Cutting and Welding
Authors:
Dirk Petring, Fraunhofer ILT; Aachen Germany
Frank Schneider, Fraunhofer ILT; Aachen Germany
Norbert Wolf, Fraunhofer ILT; Aachen Germany
Vahid Nazery, Fraunhofer ILT; Aachen Germany
Presented at ICALEO 2008
Is there an optimum brightness regime for macro laser processing of materials? Does increased brightness always improve productivity? These questions have been vigorously discussed since lasers offering beam properties near to the theoretical diffraction limit in the multi-kW range have become available. As a contribution to this debate this paper begins by describing the bri...$28.00
ICALEO 2008 Paper #205 (System Integration of Fiber and Diode Lasers)
System Integration of Fiber and Diode Lasers
Authors:
Tim Lauterborn, Fraunhofer CLT; Plymouth MI USA
Jens Peter Steinbrecher, Fraunhofer CLT; Plymouth MI USA
Stefan Heinemann, Fraunhofer CLT; Plymouth MI USA
Presented at ICALEO 2008
For reasons such as high beam quality and stability fiber laser systems have become increasingly more attractive for industrial applications. Fiber lasers typically employ diode lasers as a pump energy source and can comprise several individual stages. For applications not requiring the high beam quality or short pulses that can be generated by fiber lasers optically combined diode laser systems can be used. We demonstrate a cost-effective...$28.00
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