Welding of the 2.5mm thick 5xxx aluminum
series to the 4mm thick 6xxx aluminum series, was conducted
using a 4.0kW High Power Direct Diode Laser (HPDDL) from
Nuvonyx, Inc. All welding
was conducted autogenously. The figures below show two different
cross-sections of these welds, welded with slightly different
One of the advantages of the HPDD laser from
Nuvonyx, Inc. is that it has a wavelength of approximately
810nm, which coincides with the absorption peak for aluminum.
This increases the power effect on the aluminum alloy without
increasing the power delivered as compared to other lasers.
The HPDDL was also chosen for this project due to some of the
other advantages of the direct diode lasers which are; the high
wall plug efficiency, order of magnitude smaller footprint,
lower maintenance, and high control bandwidth. The HPDDL are
very small and compact, such that the entire laser head can
easily be mounted to the end of the robotic arm [J.M. Haake.
"Applications and Benefits of Direct Diode Lasers". Laser
Processing Consortium - Industrial Laser Processing Workshop,