ICALEO 2005 Paper #Plenary2 (Fibre Lasers: The New Wave in Material Processing)
Fibre Lasers: The New Wave in Material Processing
Authors:
David Parker, SPI; Southampton UK
David Payne, Optoelectronic Research Centre, Univ. of Southampton; Southampton UK
Presented at ICALEO 2005
In the last few years, fibre lasers have established themselves as the preferred laser source in many applications. The combination of small size, maintenance-free operation, thermal and electrical efficiency, combined with outstanding (diffraction limited) beam quality, have made the fibre laser an attractive alternative to more established technologies, and in some cases the enabling technology. Unique among high power lasers, the fiber laser is monolithic, the light being entirely c...$28.00
ICALEO 2005 Paper #Plenary1 (Diode Lasers for Industrial Applications)
Diode Lasers for Industrial Applications
Authors:
Martin Behringer, OSRAM Opto Semiconductors; Regensburg Germany
Presented at ICALEO 2005
The development of diode lasers started about 40 years ago with low power devices that were operated at cryogenic temperatures. Since then diode lasers made great progress in power, lifetime and costs. Some of the first widespread applications like telecommunication and home entertainment used the advantage of narrow linewidth and compactness, rather than efficiency and power. Especially in the last decade, great improvements were made in terms of output power as well as in costs of operation. From about 10W per 1cm laser bar 15 years ago, they have deve...$28.00
ICALEO 2005 Paper #P574 (Monitoring Laser Cladding)
Monitoring Laser Cladding
Authors:
Keng Leong, SiMMtec; Allison Park PA USA
H.C. Man, The Hong Kong Polytechnic University; Hung Hom Hong Kong
Kenneth Ho, The Hong Kong Polytechnic University; Hung Hom Hong Kong
Presented at ICALEO 2005
Laser cladding is used in the repair of high value industrial components such as rollers, axles and turbine blades. The absence of defects is essential to the remanufacturing process. Consequently, a non-intrusive cladding monitor that is robust in detecting defects and minimizes false positives would be very desirable. We report in this work a method for the monitoring of laser cladding. It is an adaptation of a commercially availa...$28.00
ICALEO 2005 Paper #P573 (A Method to Improve Efficiency and Reliability of Laser Cladding Processing by Plasma-Augmented-Laser-Cladding)
A Method to Improve Efficiency and Reliability of Laser Cladding Processing by Plasma-Augmented-Laser-Cladding
Authors:
Johannes Wilden, TU Ilmenau; Ilmenau Germany
Jean Pierre Bergmann, TU Ilmenau; Ilmenau Germany
Markus Dolles, TU Ilmenau; Ilmenau Germany
Presented at ICALEO 2005
Laser cladding offers several advantages as low dilution, low thermal influence and distortion of the components and a fine microstructure due to the high cooling rate. Nevertheless the set of laser cladding in the industrial production is nowadays limited to few applications, as the efficiency of laser sources is still too low and the running costs are too high. The absorption behaviour of...$28.00
ICALEO 2005 Paper #P572 (Researches of Cast Iron Piston Rings Strengthened by Laser)
Researches of Cast Iron Piston Rings Strengthened by Laser
Authors:
Zhang Qingmao, South China Normal University; Guangzhou Peoples Republic of China
Wenjin Liu, The Center of Laser Processing, Dept. of Mechanical Engineering, Tsinghua Univ.; Beijing Peoples Republic of China
Jianhong Liao, The Center of Laser Processing, School for Information and Photoelectron Science Engineering, South China Normal Univ.; Guangzhou Peoples Republic of China
Xiwei Zhang, Wuhan Univ.; Wuhan Peoples Republic of China
Presented at ICALEO 2005
The SRV tests show that laser remelting, laser alloying and laser cladding processes reduce the wear loss of both the piston ring an...$28.00
ICALEO 2005 Paper #P570 (Using Neural Networks and Dempster-Shafer Theory for Failure Detection and Diagnosis of Excimer Laser Ablation)
Using Neural Networks and Dempster-Shafer Theory for Failure Detection and Diagnosis of Excimer Laser Ablation
Authors:
Ronald Setia, Georgia Institute of Technology; Atlanta GA USA
Gary May, Georgia Institute of Technology; Atlanta GA USA
Presented at ICALEO 2005
With the continuing advancement of the use of excimer laser systems in microsystems packaging have come an increasing need to offset the high capital equipment investment and lower equipment downtime. This paper presents a methodology for in-line failure detection and diagnosis of the excimer laser ablation process. Our methodology employs response data originating directly from the tool and characterization of microvias ...$28.00
ICALEO 2005 Paper #P569 (Sealing of Human Dentinal Tubules by KrF 248 nm Laser Radiation)
Sealing of Human Dentinal Tubules by KrF 248 nm Laser Radiation
Authors:
Sivakumar Manickam, IST; Lisboa Portugal
Rui Vilar, Instituto Superior Tecnico; Lisboa Portugal
Vitor Oliveira, Instituto Superior Tecnico; Lisboa Portugal
Presented at ICALEO 2005
Exposure of dentinal tubules is the common cause of dental hypersensitivity. Exposed dentin tubules are unduly sensitive to thermal, mechanical, or chemical stimuli. Treatment for this should be fast, painless on application and long lasting. However most of the conventional treatments are either ineffective or relatively short-lived. The aim of the present investigation is to study the use of the KrF excimer laser radi...$28.00
ICALEO 2005 Paper #P568 (Laser Developed Al-Cr Surface Alloys: Microstructure, Mechanical and Wear Behavior)
Laser Developed Al-Cr Surface Alloys: Microstructure, Mechanical and Wear Behavior
Authors:
Amelia Almeida, Instituto Superior Tecnico, Dep. Materials; Lisbon PORTUGAL
Patricia Carvalho, Instituto Superior Tecnico; Lisboa Portugal
Rui Vilar, Instituto Superior Tecnico; Lisboa Portugal
Presented at ICALEO 2005
Al alloys with enhanced surface hardness and wear resistance were produced by laser surface alloying Cr into Al. Surface alloys with composition ranging from 10 to 20 wt.%Cr were produced. Their microstructure consists of intermetallic compound particles dispersed in a matrix of a-Al. At low solidification rates the intermetallic compound particles are of Al4Cr ph...$28.00
ICALEO 2005 Paper #P567 (Development of an Advanced Dual Beam Head for Laser Lap Joining of Zinc Coated Steel Sheet)
Development of an Advanced Dual Beam Head for Laser Lap Joining of Zinc Coated Steel Sheet
Authors:
Mariana Forrest, DaimlerChrysler Corporation; Troy MI USA
Feng Lu, Feng Lu Consulting; Bloomfield Hills MI USA
Presented at ICALEO 2005
Laser welding has shown a lot of advantages over the currently widely used resistance spot welding for automobile assembly application. These include cost savings (due to increased production speed, reduced assembly line length, etc.) and performance improvement (increased stiffness, less heat affected zone width and distortion etc). The only major problem that prevents the application of laser welding to mass production application is the zinc exp...$28.00
ICALEO 2005 Paper #P565 (Surface Treatment of Welded Duplex Stainless Steels by Diode Laser)
Surface Treatment of Welded Duplex Stainless Steels by Diode Laser
Authors:
Barbara Previtali, Politecnico Di Milano Dipartimento Di Meccanica; Milano Italy
Edoardo Capello, Politecnico Di Milano Dipartimento Di Meccanica; Milano Italy
Maurizio Vedani, Politecnico Di Milano Dipartimento Di Meccanica; Milano Italy
Moreno Castelnuovo, Politecnico Di Milano Dipartimento Di Meccanica; Milano Italy
Presented at ICALEO 2005
In this paper the recovery of the laser welded microstructure of Duplex Stainless Steel (DSS) by means of diode laser treatment is investigated. The goal of the laser surface treatment is to obtain a well balanced austenite-ferrite structure ...$28.00
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