Approach for laser beam welding under hyperbaric conditions
- BIAS Bremen Inst. of Applied Beam Technology, Bremen (Germany)
A new approach for welding under hyperbaric conditions can be the application of laser beams. Welding experiments have been performed with CVO{sub 2} and Nd:YAG lasers at elevated pressures. Deep penetration welding with CO{sub 2} laser radiation ({lambda} = 10,6 {micro}m) is not possible at elevated pressure, since the appearing metal vapor plume shields the surface. The results of trials done with a Nd:YAG laser ({lambda} = 1,06 {micro}m) show that it is possible to perform deep penetration welding up to an overpressure of 2 to 3 bar today. At higher pressures heat conduction welding can be performed. This pressure level can be extended by influencing the metal vapor plume. Nd:YAG laser radiation can be transmitted through optical fibers and therefore easily be guided below sea level. This has led to the development of a mobile Nd:YAG laser system which consists of a containerized Nd:YAG laser source, a fiber for beam transmission and a working head which is capable to be remotely controlled and operated at a pressure of up to 10 bar.
- OSTI ID:
- 264136
- Report Number(s):
- CONF-950604-; ISBN 1-880653-20-6; TRN: IM9633%%70
- Resource Relation:
- Conference: 5. international conference on offshore and polar engineering, The Hague (Netherlands), 11-15 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the fifth (1995) international offshore and polar engineering conference. Volume 4; Dos Santos, J.F. [ed.] [GKSS Forschungszentrum Geesthacht (Germany)]; Langen, I. [ed.] [Hogskole i Stavanger (Norway)]; Ellinas, C.P. [ed.] [Advanced Mechanics and Engineering, Croydon (United Kingdom)]; Ueda, Yukio [ed.] [Osaka Univ. (Japan). Welding Research Inst.]; PB: 574 p.
- Country of Publication:
- United States
- Language:
- English
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