Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition

2021 ◽  
Author(s):  
Marius Gipperich ◽  
Christian Peters ◽  
Jan Riepe ◽  
Robin Day ◽  
Thomas Bergs
Keyword(s):  
Metal Deposition ◽  
Temperature Fields ◽  
Laser Metal Deposition ◽  
Beam Laser ◽  
Dual Beam

scholarly journals Pulsed Laser Influence on Temperature Distribution during Dual Beam Laser Metal Deposition

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 766
Author(s):  
Marius Gipperich ◽  
Jan Riepe ◽  
Kristian Arntz ◽  
Thomas Bergs
Keyword(s):  
Temperature Distribution ◽  
Continuous Wave ◽  
Metal Deposition ◽  
Process Conditions ◽  
Laser Metal Deposition ◽  
Effective Absorption Coefficient ◽  
Positive Effects ◽  
Real Process ◽  
Dual Beam ◽  
Wide Range

Wire-based Laser Metal Deposition (LMD-w) is a suitable manufacturing technology for a wide range of applications such as repairing, coating, or additive manufacturing. Employing a pulsed wave (pw) laser additionally to the continuous wave (cw) process laser has several positive effects on the LMD process stability. The pw-plasma has an influence on the cw-absorption and thus the temperature distribution in the workpiece. In this article, several experiments are described aiming to characterize the heat input during dual beam LMD. In the first setup, small aluminum and steel disks are heated up either by only cw or by combined cw and pw radiation. The absorbed energy is then determined by dropping the samples into water at ambient temperature and measuring the water’s temperature rise. In a second experiment, the temperature distribution in the deposition zone under real process conditions is examined by two-color pyrometer measurements. According to the results, the pw plasma leads to an increase of the effective absorption coefficient by more than 20%. The aim of this work is to achieve a deeper understanding of the physical phenomena acting during dual beam LMD and to deploy them selectively for a better and more flexible process control.

Integration of pure copper to optimize heat dissipation in injection mould inserts using laser metal deposition

2021 ◽  
Vol 33 (1) ◽  
pp. 012029
Author(s):  
Stefan Polenz ◽  
Christian Kolbe ◽  
Florian Bittner ◽  
Elena López ◽  
Frank Brückner ◽  
...  
Keyword(s):  
Heat Dissipation ◽  
Pure Copper ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Injection Mould

POWDER BEAM ANALYSIS OF LASER METAL DEPOSITION COAXIAL NOZZLE VIA IMAGE PROCESSING

2019 ◽  
Author(s):  
Doglas Negri ◽  
Gustavo Reis de Ascencao ◽  
Saulo Melotti ◽  
Jhonattan Gutjahr
Keyword(s):  
Image Processing ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Coaxial Nozzle ◽  
Beam Analysis

TRIBOLOGICAL EVALUATION OF NI-CR-B-SI COATINGS DEPOSITED BY LASER METAL DEPOSITION AND TREATED BY LASER REMELTING

2019 ◽  
Author(s):  
Jurandir Sousa ◽  
Adriano de Souza Pinto Pereira ◽  
Rafael Gomes Nunes Silva ◽  
Calil Amaral ◽  
Milton Pereira
Keyword(s):  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Laser Remelting

scholarly journals Laser metal deposition of copper on diverse metals using green laser sources

2020 ◽  
Vol 107 (3-4) ◽  
pp. 1559-1568 ◽  
Author(s):  
Himani Siva Prasad ◽  
Frank Brueckner ◽  
Joerg Volpp ◽  
Alexander F. H. Kaplan
Keyword(s):  
Green Laser ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Laser Sources
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