Utilization of laser beam oscillation to enhance the process efficiency for deep-penetration welding in aluminum

2017 ◽  
Vol 29 (2) ◽  
pp. 022404 ◽  
Author(s):  
Martin Sommer ◽  
Jan-Philipp Weberpals ◽  
Steffen Müller
Keyword(s):  
Laser Beam ◽  
Process Efficiency ◽  
Deep Penetration ◽  
Deep Penetration Welding ◽  
Beam Oscillation

Advantages of laser beam oscillation for remote welding of aluminum closely above the deep-penetration welding threshold

2017 ◽  
Vol 29 (1) ◽  
pp. 012001 ◽  
Author(s):  
Martin Sommer ◽  
Jan-Philipp Weberpals ◽  
Steffen Müller ◽  
Peter Berger ◽  
Thomas Graf
Keyword(s):  
Laser Beam ◽  
Deep Penetration ◽  
Deep Penetration Welding ◽  
Remote Welding ◽  
Beam Oscillation

scholarly journals Process Window for Highly Efficient Laser-Based Powder Bed Fusion of AlSi10Mg with Reduced Pore Formation

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5255
Author(s):  
Artur Leis ◽  
Rudolf Weber ◽  
Thomas Graf
Keyword(s):  
Laser Beam ◽  
Process Efficiency ◽  
Process Window ◽  
Deep Penetration ◽  
Optimum Process ◽  
Beam Diameter ◽  
Powder Bed Fusion ◽  
Powder Bed ◽  
Highly Efficient ◽  
Low Porosity

The process window for highly efficient laser-based powder bed fusion (LPBF), ensuring the production of parts with low porosity, was determined by analyzing cross-sections of samples that were generated with laser powers varying between 10.8 W and 1754 W, laser beam diameters varying between 35 μm and 200 μm, and velocities of the moving laser beam ranging between 0.7 m/s and 1.3 m/s. With these parameters, the process alters between different modes that are referred to as simple heating, heat conduction melting (HCM), key-bowl melting (KBM), and deep-penetration melting (DPM). It was found that the optimum process window for a highly efficient LPBF process, generating AlSi10Mg parts with low porosity, is determined by the ratio PL/db of the incident laser power PL and the beam diameter db of the beam on the surface of the bead, and ranges between PL/db = 2000 W/mm and PL/db = 5200 W/mm, showing process efficiencies of about 7–8%. This optimum process window is centered around the range PL/db = 3000–3500 W/mm, in which the process is characterized by KBM, which is an intermediate process mode between HCM and DPM. Processes with PL/db < 2000 W/mm partially failed, and lead to balling and a lack of fusion, whereas processes with PL/db > 5200 W/mm showed a process efficiency below 5% and pore ratios exceeding 10%.

scholarly journals Influence of focal spot diameter and beam oscillation on the process efficiency of laser beam welding utilizing a direct diode laser

Procedia CIRP ◽  
2018 ◽  
Vol 74 ◽  
pp. 466-469 ◽  
Author(s):  
Kerstin Schaumberger ◽  
Vincent Mann ◽  
Michael Mödl ◽  
Konstantin Hofmann ◽  
Stefan Stein ◽  
...  
Keyword(s):  
Laser Beam ◽  
Diode Laser ◽  
Focal Spot ◽  
Laser Beam Welding ◽  
Process Efficiency ◽  
Spot Diameter ◽  
Focal Spot Diameter ◽  
Beam Oscillation

Development of ultra deep penetration welding with 10 kW fiber laser

2008 ◽  
Author(s):  
Xudong Zhang ◽  
Eiji Ashida ◽  
Seiji Katayama ◽  
Masami Mizutani
Keyword(s):  
Fiber Laser ◽  
Deep Penetration ◽  
Deep Penetration Welding

Self-focusing and waveguide propagation of radiation in the case of deep penetration of a metal by a laser beam

1985 ◽  
Vol 15 (11) ◽  
pp. 1515-1523 ◽  
Author(s):  
A G Borkin ◽  
S V Drobyazko ◽  
E B Levchenko ◽  
Yu M Senatorov ◽  
V V Turygin
Keyword(s):  
Laser Beam ◽  
Deep Penetration ◽  
Self Focusing ◽  
Waveguide Propagation
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