ICALEO 2008 Paper #1710 (Monitoring Through the Optical Combiner in Fiber Laser Welding)
Monitoring Through the Optical Combiner in Fiber Laser Welding
Authors:
Barbara Previtali, Politecnico Di Milano; Milano Italy
Daniele Colombo, Politecnico di Milano; Milano Italy
Edoardo Capello, Politecnico Di Milano; Milano Italy
Presented at ICALEO 2008
In the last years the introduction of the fiber laser (FL) technology has upset the whole scenery of laser processing. Unlimited laser powers, high beam quality and high reliability are only some of the key features of this new family of laser sources that are defining new edges to the process performances in laser welding and cutting. The increasing interest in this new technology has focused the attention on many...$28.00
ICALEO 2008 Paper #1708 (Correlation Between Photodiode Monitoring and High Speed Imaging of the Dynamics Causing Laser Welding Defects)
Correlation Between Photodiode Monitoring and High Speed Imaging of the Dynamics Causing Laser Welding Defects
Authors:
Peter Norman, Lulea University of Technology; Luleå Sweden
Alexander Kaplan, Luleaa University of Technology; Lulea Sweden
Hans Engstrom, Luleaa University of Technology; Lulea Sweden
Per Gren, Luleaa University of Technology; Luleaa Sweden
Presented at ICALEO 2008
Today merely a few monitoring systems for in-process detection of laser welding defects are commercially available. Despite a trend towards cameras, industrially more robust is still a photodiode, measuring in an optically filtered spectral window either the thermal emissions ...$28.00
ICALEO 2008 Paper #1707 (Laser Welding of Copper Alloy for Beam Monitor System)
Laser Welding of Copper Alloy for Beam Monitor System
Authors:
Zhiyue Xu, Argonne National Laboratory; Argonne IL USA
James W. Morgan, Argonne National Laboratory; Argonne USA
Keng H Leong, Argonne National Laboratory; Argonne IL USA
James L. Bailey, Argonne National Laboratory; Argonne USA
Presented at ICALEO 2008
Beam position monitors (BPM) are critical for beam-based alignment and operation of the worlds first X-ray free electron laser, Linac Coherent Light Source, being built at Stanford Linear Accelerator Center. Fabrication of the BPMs requires welding of components made of copper alloy that is extremely difficult to weld due to its low absorptiv...$28.00
ICALEO 2008 Paper #1706 (Closed Loop Control of Laser Welding Processes with Cellular Neural Network (CNN) Cameras)
Closed Loop Control of Laser Welding Processes with Cellular Neural Network (CNN) Cameras
Authors:
F. Abt, Forschungsgesellschaft Fuer Strahlwerkzeuge Fgsw; Stuttgart Germany
L. Nicolosi, Technische Universit�T Dresden; Dresden Germany
D. Carl, Ipm Fraunhofer Institut Fuer Physikalische Messtechnik; Freiburg Germany
A. Blug, Ipm Fraunhofer-Institut Fuer Physikalische Messtechnik; Freiburg Germany
M. Geese, Wolfgang Von Goethe Universitaet; Frankfurt Am Main Germany
C. Deininger, Technologiegesellschaft Fuer Strahlwerkzeuge Mbh Tgsw; Stuttgart Germany
F. Dausinger, Dausinger + Giesen Gmbh; Stuttgart Germany
H. H�Fler, I...$28.00
ICALEO 2008 Paper #1705 (Robust Sensing and Predictive Control of Direct Metal Deposition)
Robust Sensing and Predictive Control of Direct Metal Deposition
Authors:
Lijun Song, CLAIM, The University of Michigan; Ann Arbor MI USA
Jyoti Mazumder, Claim, University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2008
Direct metal deposition is one of the rapid manufacturing technologies to fabricate geometrically complicated, dense, near-net-shape components. Deposition process involves a large number of parameters, among which the laser power is considered as the primary manipulated parameter. In order to develop a control system for the process, molten pool temperature during deposition was monitored by a two-color pyrometer. Laser power and molten pool temperature form...$28.00
ICALEO 2008 Paper #1704 (Studying the Quality of Laser Welding Process using Time-frequency Distributions with Rotated Kernel)
Studying the Quality of Laser Welding Process using Time-frequency Distributions with Rotated Kernel
Authors:
Giuseppe D'Angelo, Centro Ricerche Fiat; Orbassano Italy
Presented at ICALEO 2008
Laser welding is becoming more and more important in automotive industry and quality of the weld is critical for a successful application. In many cases the increase in welding speed provided by laser welding has caused the welding system operator to be unable to keep up with the production rate while inspecting each part. Therefore, real time on-line inspection of the weld must be provided. To address this need, in the last years a number of on-line inspection systems, have being developed to improve wel...$28.00
ICALEO 2008 Paper #1701 (Imaging in Cooperation with Modeling of Selected Defect Mechanisms during Fiber Laser Welding of Stainless Steel)
Imaging in Cooperation with Modeling of Selected Defect Mechanisms during Fiber Laser Welding of Stainless Steel
Authors:
Alexander Kaplan, Lulea University of Technology; Lulea Sweden
Elin Westin, Outokumpu Stainless, Avesta Research Center; Avesta Sweden
Greger Wiklund, Lulea University of Technology; Lulea Sweden
Peter Norman, Lulea University of Technology; Lulea Sweden
Presented at ICALEO 2008
Fiber laser welding of stainless steel was studied for different joint configurations and gaps. The higher focusing capability of fiber lasers compared to traditional Nd:YAG- and CO2-lasers creates a different keyhole and melt pool geometry, usually smaller. The...$28.00
ICALEO 2008 Paper #1607 (Comparison on Corrosion-Resistance of Inconel 690 Coatings by Nd:YAG Laser and CO2 Laser Deposition for Repairing Nuclear Power Plant Component)
Comparison on Corrosion-Resistance of Inconel 690 Coatings by Nd:YAG Laser and CO2 Laser Deposition for Repairing Nuclear Power Plant Component
Authors:
Dongye Zhang, Tsinghua University, Dept of Mechanical Engineering; Beijing Peoples Republic of China
Minlin Zhong, Tsinghua University; Beijing Peoples Republic of China
Yide Kan, Tsinghua University; Beijing Peoples Republic of China
Presented at ICALEO 2008
Laser deposition is considered a promising approach for repairing or rejuvenating as-eroded nuclear power plant components after long time of operation to restore their resistance to intergranular-stress-corrosion (IGSC) under rigorous radiation conditions. The IG...$28.00
ICALEO 2008 Paper #1606 (Laser Cladding Ni-base Composite Coatings Reinforced by In-Situ Synthesized Multiple Carbide Particles)
Laser Cladding Ni-base Composite Coatings Reinforced by In-Situ Synthesized Multiple Carbide Particles
Authors:
Mingxing Ma, ; Beijing Peoples Republic of China
Ruiquan Kang, ; Beijing Peoples Republic of China
Minlin Zhong, ; Beijing Peoples Republic of China
Wenjin Liu, ; Beijing Peoples Republic of China
Weiming Zhang, ; Beijing Peoples Republic of China
Yide Kan, ; Beijing Peoples Republic of China
Hongjun Zhang, ; Beijing Peoples Republic of China
Presented at ICALEO 2008
Ni-base composite coatings reinforced by in situ synthesized multiple carbide particles were fabricated on medium carbon steel through ...$28.00
ICALEO 2008 Paper #1605 (High Power Direct Diode Laser Cladding of Stainless and Nickel Alloys)
High Power Direct Diode Laser Cladding of Stainless and Nickel Alloys
Authors:
Brandon Shinn, Siemens Power Generation, Inc.; Orlando FL USA
Gerald Bruck, Siemens Power Generation, Inc; Orlando FL USA
Presented at ICALEO 2008
A four kilowatt high power direct diode laser is demonstrated to clad stainless (UNS S41000) and nickel based (UNS N06002) alloys. Trials are conducted using pre-placed as well as argon fed filler metal powders deposited on matching alloy substrates. Parametric tests are performed to define effects of powder depth, powder feed rate, and travel speed. Relationships between such parameters and physical attributes such as reinforcement area and base metal dilu...$28.00
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