The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
In situ X-ray imaging of defect and molten pool dynamics in laser additive manufacturing
Open accessAbstract
The laser–matter interaction and solidification phenomena associated with laser additive manufacturing (LAM) remain unclear, slowing its process development and optimisation. Here, through in situ and operando high-speed synchrotron X-ray imaging, we reveal the underlying physical phenomena during the deposition of the first and second layer melt tracks. We show that the laser-induced gas/vapour jet promotes the formation of melt tracks and denuded zones via spattering (at a velocity of 1 m s−1). We also uncover mechanisms of pore migration by Marangoni-driven flow (recirculating at a velocity of 0.4 m s−1), pore dissolution and dispersion by laser re-melting. We develop a mechanism map for predicting the evolution of melt features, changes in melt track morphology from a continuous hemi-cylindrical track to disconnected beads with decreasing linear energy density and improved molten pool wetting with increasing laser power. Our results clarify aspects of the physics behind LAM, which are critical for its development.
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Cites
Metal Additive Manufacturing: A Review
Frazier, W. E. (2014) · Journal of Materials Engineering and Performance · doi:10.1007/s11665-014-0958-z · Cited by 5,984
Cited by
Directed Energy Deposition (DED) Process: State of the Art
Ahn, D.-G. (2021) · International Journal of Precision Engineering and Manufacturing-Green Technology · doi:10.1007/s40684-020-00302-7 · Cited by 803
The effect of powder oxidation on defect formation in laser additive manufacturing
Leung, C. L. A., Marussi, S., Towrie, M., Atwood, R. C., Withers, P. J., & Lee, P. D. (2019) · Acta Materialia · doi:10.1016/j.actamat.2018.12.027 · Cited by 336
Self-citationYu, W., Sing, S. L., Chua, C. K., & Tian, X. (2019) · Journal of Alloys and Compounds · doi:10.1016/j.jallcom.2019.04.017 · Cited by 303
Wang, S., Ning, J., Zhu, L., Yang, Z., Yan, W., Dun, Y., Xue, P., Xu, P., Bose, S., & Bandyopadhyay, A. (2022) · Materials Today · doi:10.1016/j.mattod.2022.08.014 · Cited by 279
Effects of process parameters on porosity in laser powder bed fusion revealed by X-ray tomography
du Plessis, A. (2019) · Additive Manufacturing · doi:10.1016/j.addma.2019.100871 · Cited by 264
Metadata
- Authors
- Leung, C. L. A., Marussi, S., Atwood, R. C., Towrie, M., Withers, P. J., & Lee, P. D.
- Venue
- Nature Communications
- Published
- 2018-04-10
- Volume
- 9
- Issue
- 1
- Pages
- 1355-1355
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2797662745
- Cited by
- 817
- References
- 1
- FWCI
- 47.33
- Type
- journal article
- Language
- en
- Open access
- gold
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- Leung, C. L. A., Marussi, S., Atwood, R. C., Towrie, M., Withers, P. J., & Lee, P. D. (2018). In situ X-ray imaging of defect and molten pool dynamics in laser additive manufacturing. Nature Communications. https://doi.org/10.1038/s41467-018-03734-7
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