Aluminum welding by combining a diode laser with a pulsed Nd:YAG laser

Aluminum welding by combining a diode laser with a pulsed Nd:YAG laser

Laser welding of aluminum alloys (AA 5754 and AA 6016) by superimposing a pulsed Nd:YAG laser with a continuous wave (cw) diode laser has been investigated in order to improve the weldability and the process efficiency. The low absorption of laser radiation at a wavelength of 1064 nm and the high th...

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Veröffentlicht in:Welding in the world 2015-03, Vol.59 (2), p.307-315
Hauptverfasser: Bergmann, Jean Pierre, Bielenin, Martin, Feustel, Thomas
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry and Materials Science
Materials Science
Metallic Materials
Research Paper
Solid Mechanics
Theoretical and Applied Mechanics
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Zusammenfassung:Laser welding of aluminum alloys (AA 5754 and AA 6016) by superimposing a pulsed Nd:YAG laser with a continuous wave (cw) diode laser has been investigated in order to improve the weldability and the process efficiency. The low absorption of laser radiation at a wavelength of 1064 nm and the high thermal conductivity make it difficult to laser weld aluminum alloys efficiently. Therefore, a pulsed Nd:YAG laser and a low power diode laser emitting a wavelength of 980 nm were spatially superimposed. This configuration allows to enhance the absorption for the Nd:YAG welding laser due to the preheating of the diode laser. Thus, the process efficiency as well as the weld quality is enhanced. The experiments revealed that a small output power of the diode laser (
ISSN:0043-2288
1878-6669
DOI:10.1007/s40194-014-0218-8