Laser bifocal hybrid welding of aluminum

A. Trautmann, M. F. Zaeh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations


This paper renders research into the fundamentals governing the melt pool dynamics of a hybrid bifocal laser welding system consisting of an Nd:YAG and a high power diode laser (HPDL). The resulting superposition of keyhole by heat conduction mode welding is assayed for extruded aluminum. In particular the diffusion of the surface oxygen layer is considered. By comparing the results attainable by bifocal laser hybrid welding to the constituent laser processes synergetic effects of the laser hybrid can be demonstrated. These are namely the doubling of the welding speed from 2.0 min-1 to 4.0 m min -1, the reduction of the roughness of the weld surface from 60 μm to approximately 10 μm and an increase in energy transfer efficiency. The experimental investigations verifying these synergies are outlined and discussed.

Original languageEnglish
Title of host publicationFlexible Manufacture of Lightweight Frame Structures - Proceedings
PublisherTrans Tech Publications
Number of pages14
ISBN (Print)0878494030, 9780878494033
StatePublished - 2006

Publication series

NameAdvanced Materials Research
ISSN (Print)1022-6680


  • Aluminum
  • Bifocal
  • EN AW-6060
  • Filler wire
  • Finish crater
  • Hybrid
  • Laser welding


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