Results 211 to 220 of about 8,497 (257)

Laser beam welding with a hybrid laser system

ICALEO 2000: Proceedings of the Laser Materials Processing Conference, 2000
Diode lasers are a new high-power beam source for material processing. In comparison to conventional beam sources like CO2 – or Nd:YAG – lasers they have the advantages of small size, low maintenance costs and considerably higher efficiency. Currently one advantage of Nd:YAG – lasers is better beam quality allowing higher focus intensity.
G. Reinhart, J. Härtl, C. Lehner
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Laser-Beam Welding

1993
AbstractLaser-beam welding (LBW) uses a moving high-density coherent optical energy source, called laser, as the source of heat. This article discusses the advantages and limitations of LBW and tabulates energy consumption and efficiency of LBW relative to other selected welding processes.
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Development of the laser stir welding process for aluminum laser beam welding

ICALEO 2005: 24th International Congress on Laser Materials Processing and Laser Microfabrication, 2005
Laser stir welding involves the manipulation of the laser beam to provide hydrodynamic stirring and subsequent healing of the keyhole. Since aluminum alloys tend to be especially sensitive to keyhole stability, the process has been conceived for laser beam welding of these alloys.
R. P. Martukanitz, I. Stol, J. F. Tressler, C. J. Warren   +3 more
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Temper-Bead Weld by Underwater Laser Beam Welding

Volume 1: Plant Operations, Maintenance, Engineering, Modifications and Life Cycle; Component Reliability and Materials Issues; Next Generation Systems, 2009
In repair welding for nuclear reactor vessel, low alloy steels are affected by heat input during welding process. The conventional repair welding for wall steel constructions requires post weld heat treatment (PWHT) to achieve the desired microstructure properties.
Takeshi Fukuda, Rie Sumiya, Wataru Kono, Nobuichi Suezono, Masataka Tamura, Itaru Chida   +5 more
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Spatter formation in laser beam welding using laser beam oscillation

Welding in the World, 2014
This paper presents an approach towards a better understanding of spatter formation in laser beam welding. Hereunto, experimental investigations and numerical simulation are carried out. For the study, various steels and aluminium alloys were selected to investigate the influences of alloying elements upon spatter formation.
Florian Hugger, Konstantin Hofmann, Stefanie Kohl, Michael Dobler, Michael Schmidt   +4 more
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Absorption of the laser beam by the plasma in deep laser beam welding of metals

Journal of Applied Physics, 1995
We present a simple model for the keyhole plasma in deep penetration welding with a laser beam. Simplifying the complete set of transport equations investigated by C. Tix and G. Simon [Phys. Rev. E 50, 453 (1994)] for high laser powers yields an energy balance for the plasma, which can be treated analytically.
C. Tix, U. Gratzke, G. Simon
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Electron beam welding, laser beam welding and gas tungsten arc welding of titanium sheet

Materials Science and Engineering: A, 2000
Microstructures, properties and technical parameters of welding specimen of 0.5 mm thick sheets of commercial purity titanium (C.P. Ti) have been studied via high vacuum electron beam welding (EBW-HV), CO2 laser beam welding (LBW) and gas tungsten arc welding (TIG), as well as optical microscope (OM) observation and microhardness measuring. The results
Qi Yunlian, Deng Ju, Hong Quan, Zeng Liying   +3 more
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Electron beam welding vs. laser beam welding for air bearing shaft

ICALEO 2005: 24th International Congress on Laser Materials Processing and Laser Microfabrication, 2005
Air bearings allow designers to push the envelope on precision and high-speed applications. Unlike contact roller bearings, air bearings utilise thin film pressurised air to provide “zero friction” load bearing interface between surfaces that would otherwise be in contact with each other.
M. Naeem, Steve Lock, Peter Collins, Geoff Hooley   +3 more
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Laser beam welding in vacuum – A process variation in comparison with electron beam welding

ICALEO 2010: 29th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2010
This article gives a comparison between laser beam welding and electron beam welding. In a first step, the basic principles and properties of both methods and/or the resulting weld joints are specified, afterwards the research results from laser beam welding in vacuum are presented. Thanks to modern laser systems (fibre laser and/or disk
Uwe Reisgen, Simon Olschok, Stefan Longerich   +2 more
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Haz hardness in laser beam welds

ICALEO '99: Proceedings of the Laser Materials Processing Conference, 1999
The thermal profiles that result from a numerical model of laser beam welding are used to calculate the hardness in the heat-affected zone of two 10-mm-thick BS4360 50D steel welds. The numerical model assumes a cylindrical keyhole with the same radius as that of the incident laser beam.
E. A. Metzbower, S. G. Lambrakos, H. K. D. H. Bhadeshia   +2 more
openaire   +1 more source