Ultrashort laser pulses are often used in industrial manufacturing due to the small heat-affected zones they produce and their low melt formation. A contrasting approach aims to exploit the residual heat of successively applied laser pulses in combination with the material response. As a result of the heat accumulation within a burst, the formation of a melt film that is highly spatially and temporally confined is possible. Experiments, theoretical analysis, and numerical heat-flow simulations are used to show the influence of the laser parameters on pulsed melting and surface structure formation. Special attention is paid to the temporal delay between the pulses. A comparison of the process on iron and titanium allows the influence of material properties to be considered.
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7 August 2021
Research Article|
August 06 2021
Ultrashort pulse surface melting and smoothing: The impact of pulse spacing on heat accumulation and structure formation
F. Nyenhuis
;
F. Nyenhuis
a)
1
Robert Bosch GmbH, Bosch Research
, Postbox 30 02 40, D-70442 Stuttgart, Germany
a)Author to whom correspondence should be addressed: Fabian.Nyenhuis@de.bosch.com
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A. Michalowski;
A. Michalowski
1
Robert Bosch GmbH, Bosch Research
, Postbox 30 02 40, D-70442 Stuttgart, Germany
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J. L’huillier
J. L’huillier
2
Photonik-Zentrum Kaiserslautern e.V., Kohlenhofstr. 10, D-67633 Kaiserslautern, Germany and Research Center OPTIMAS, University Kaiserslautern
, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany
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a)Author to whom correspondence should be addressed: Fabian.Nyenhuis@de.bosch.com
J. Appl. Phys. 130, 053106 (2021)
Article history
Received:
March 11 2021
Accepted:
July 22 2021
Citation
F. Nyenhuis, A. Michalowski, J. L’huillier; Ultrashort pulse surface melting and smoothing: The impact of pulse spacing on heat accumulation and structure formation. J. Appl. Phys. 7 August 2021; 130 (5): 053106. https://doi.org/10.1063/5.0049987
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