Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses
In powder bed fusion with laser beams (PBF-LB/M), the component's quality and mechanical properties are limited by
restricted process parameter combinations and the geometry of the component. Combining PBF-LB/M with ultrashort laser
ablation enables additional control of the heat flow to adjust local solidification. On the one hand it is possible to print
heat-dissipating structures, which can be added and removed during the build process. On the other hand, ablated slits in
the component can serve as a thermal barrier.
To investigate the effect of slits and heat-dissipation structures on the local temperature field and solidification conditions,
a numerical model was developed. Two different ablation strategies were investigated and compared to conventional
PBF-LB. Numerical investigations of an additively manufactured AlSi10Mg component showed a larger melt pool, a lower
temperature gradient, and a lower cooling rate if there are slits present next to the current PBF-LB track.
This approach provides the potential to independently adjust microstructure and mechanical properties, exceeding
limitations imposed by the component's geometry in conventional additive manufacturing.
%0 Conference Paper
%1 Michel_2024
%A Michel, Johannes
%A Ulff, Nico
%A Henn, Manuel
%A Simonds, Brian
%A Hosemann, Peter
%A Zanger, Frederik
%A Hagenlocher, Christian
%A Graf, Thomas
%B Laser 3D Manufacturing XI
%D 2024
%E Gu, Bo
%E Chen, Hongqiang
%I SPIE
%K Heat-dissipatingStructures myown Heat-dissipatinStructures PBF-LB/M Heat-dissipating Ablation Solidification USP with Simulation Additive AdditiveManufacturing of AlSi10Mg field structures UltrashortPulse manufacturing Microstructure temperature
%R 10.1117/12.3002302
%T Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses
%U http://dx.doi.org/10.1117/12.3002302
%V 12876
%X In powder bed fusion with laser beams (PBF-LB/M), the component's quality and mechanical properties are limited by
restricted process parameter combinations and the geometry of the component. Combining PBF-LB/M with ultrashort laser
ablation enables additional control of the heat flow to adjust local solidification. On the one hand it is possible to print
heat-dissipating structures, which can be added and removed during the build process. On the other hand, ablated slits in
the component can serve as a thermal barrier.
To investigate the effect of slits and heat-dissipation structures on the local temperature field and solidification conditions,
a numerical model was developed. Two different ablation strategies were investigated and compared to conventional
PBF-LB. Numerical investigations of an additively manufactured AlSi10Mg component showed a larger melt pool, a lower
temperature gradient, and a lower cooling rate if there are slits present next to the current PBF-LB track.
This approach provides the potential to independently adjust microstructure and mechanical properties, exceeding
limitations imposed by the component's geometry in conventional additive manufacturing.
@inproceedings{Michel_2024,
abstract = {In powder bed fusion with laser beams (PBF-LB/M), the component's quality and mechanical properties are limited by
restricted process parameter combinations and the geometry of the component. Combining PBF-LB/M with ultrashort laser
ablation enables additional control of the heat flow to adjust local solidification. On the one hand it is possible to print
heat-dissipating structures, which can be added and removed during the build process. On the other hand, ablated slits in
the component can serve as a thermal barrier.
To investigate the effect of slits and heat-dissipation structures on the local temperature field and solidification conditions,
a numerical model was developed. Two different ablation strategies were investigated and compared to conventional
PBF-LB. Numerical investigations of an additively manufactured AlSi10Mg component showed a larger melt pool, a lower
temperature gradient, and a lower cooling rate if there are slits present next to the current PBF-LB track.
This approach provides the potential to independently adjust microstructure and mechanical properties, exceeding
limitations imposed by the component's geometry in conventional additive manufacturing.},
added-at = {2024-05-08T20:35:51.000+0200},
author = {Michel, Johannes and Ulff, Nico and Henn, Manuel and Simonds, Brian and Hosemann, Peter and Zanger, Frederik and Hagenlocher, Christian and Graf, Thomas},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2c47506f57bff71e5a4b18dd91640762f/ifsw},
booktitle = {Laser 3D Manufacturing XI},
doi = {10.1117/12.3002302},
editor = {Gu, Bo and Chen, Hongqiang},
eventdate = {27 January - 1 February 2024},
eventtitle = {LASE Photonics West},
interhash = {65b5dae017fa6d9aac205df60afb2244},
intrahash = {c47506f57bff71e5a4b18dd91640762f},
keywords = {Heat-dissipatingStructures myown Heat-dissipatinStructures PBF-LB/M Heat-dissipating Ablation Solidification USP with Simulation Additive AdditiveManufacturing of AlSi10Mg field structures UltrashortPulse manufacturing Microstructure temperature},
language = {english},
month = mar,
publisher = {SPIE},
series = {Proc. SPIE},
timestamp = {2024-05-08T21:04:50.000+0200},
title = {Adjusting the microstructure of additively manufactured parts with tailored temperature fields by the combination of powder bed fusion with cw-laser and ablation with ultrashort laser pulses},
url = {http://dx.doi.org/10.1117/12.3002302},
venue = {San Francisco, California, United States},
volume = 12876,
year = 2024
}
