• Corpus ID: 218900607

Discovering universal scaling laws in 3D printing of metals with genetic programming and dimensional analysis

@article{Gan2020DiscoveringUS,
  title={Discovering universal scaling laws in 3D printing of metals with genetic programming and dimensional analysis},
  author={Zhengtao Gan and Orion L. Kafka and Niranjan D. Parab and Cang Zhao and Olle G. Heinonen and Tao Sun and Wing Kam Liu},
  journal={arXiv: Applied Physics},
  year={2020}
}
We leverage dimensional analysis and genetic programming (a type of machine learning) to discover two strikingly simple but universal scaling laws, which remain accurate for different materials, processing conditions, and machines in metal three-dimensional (3D) printing. The first one is extracted from high-fidelity high-speed synchrotron X-ray imaging, and defines a new dimensionless number, Keyhole number, to predict melt-pool vapor depression depth. The second predicts porosity using the… 

Figures from this paper

References

SHOWING 1-10 OF 31 REFERENCES
Pore elimination mechanisms during 3D printing of metals
TLDR
It is found that the high thermocapillary force, induced by the high temperature gradient in the laser interaction region, can rapidly eliminate pores from the melt pool during the LPBF process.
Dimensionless analysis on selective laser melting to predict porosity and track morphology
Scaling laws for the additive manufacturing
3D printing of high-strength aluminium alloys
TLDR
The approach to metal-based additive manufacturing is applicable to a wide range of alloys and can be implemented using a range of additive machines, and provides a foundation for broad industrial applicability, including where electron-beam melting or directed-energy-deposition techniques are used instead of selective laser melting.
Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging
TLDR
The direct visualization of the keyhole morphology and dynamics with high-energy x-rays shows that (i) keyholes are present across the range of power and scanning velocity used in laser powder bed fusion; and (ii) there is a well-defined threshold from conduction mode to keyhole based on laser power density.
Dynamics of pore formation during laser powder bed fusion additive manufacturing
TLDR
In situ X-ray imaging and finite element simulations are used to show how detrimental pores form under printing conditions and develop a strategy to suppress them and provide insight into the physics of laser-metal interaction.
Additive manufacturing of polymer-derived ceramics
TLDR
Preceramic monomers that are cured with ultraviolet light in a stereolithography 3D printer or through a patterned mask, forming 3D polymer structures that can have complex shape and cellular architecture are reported.
Energy Coupling Mechanisms and Scaling Behavior Associated with Laser Powder Bed Fusion Additive Manufacturing
In situ optical absorptivity measurements are carried out to clarify the physics of the laser‐material interactions involved and to validate both finite element and analytical models describing laser
...
1
2
3
4
...