Revealing melt flow instabilities in laser powder bed fusion additive manufacturing of aluminum alloy via in-situ high-speed X-ray imaging
Abstract
Laser metal additive manufacturing technologies enable the fabrication of geometrically and compositionally complex parts unachievable by conventional manufacturing methods. However, the certification and qualification of additively manufactured parts are greatly hindered by the stochastic melt flow instabilities intrinsic to the process, which has not been explicitly revealed by direct observation. Here, we report the mechanisms of the melt flow instabilities in laser powder bed fusion additive manufacturing process revealed by in-situ high-speed high-resolution synchrotron X-ray imaging. Here we identified powder/droplet impact, significant keyhole oscillation, and melting-mode switching as three major mechanisms for causing melt flow instabilities. We demonstrated the detrimental consequences of these instabilities brought to the process, and presented new understanding on the melt flow evolution and keyhole oscillation. This work provides critical insights into process instabilities during laser metal additive manufacturing, which may guide the development of instability mitigation approaches. The results reported here are also important for the development and validation of high-fidelity computational models.
- Authors:
-
- University of Wisconsin, Madison, WI (United States)
- Argonne National Laboratory (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1970366
- Grant/Contract Number:
- AC02-06CH11357; DMR-1720415
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Machine Tools and Manufacture
- Additional Journal Information:
- Journal Volume: 175; Journal ID: ISSN 0890-6955
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; additive manufacturing; laser processing; melt flow; synchrotron X-ray imaging
Citation Formats
Guo, Qilin, Qu, Minglei, Escano, Luis I., Hojjatzadeh, S. H., Young, Zachary, Fezzaa, Kamel, and Chen, Lianyi. Revealing melt flow instabilities in laser powder bed fusion additive manufacturing of aluminum alloy via in-situ high-speed X-ray imaging. United States: N. p., 2022.
Web. doi:10.1016/j.ijmachtools.2022.103861.
Guo, Qilin, Qu, Minglei, Escano, Luis I., Hojjatzadeh, S. H., Young, Zachary, Fezzaa, Kamel, & Chen, Lianyi. Revealing melt flow instabilities in laser powder bed fusion additive manufacturing of aluminum alloy via in-situ high-speed X-ray imaging. United States. https://doi.org/10.1016/j.ijmachtools.2022.103861
Guo, Qilin, Qu, Minglei, Escano, Luis I., Hojjatzadeh, S. H., Young, Zachary, Fezzaa, Kamel, and Chen, Lianyi. Sat .
"Revealing melt flow instabilities in laser powder bed fusion additive manufacturing of aluminum alloy via in-situ high-speed X-ray imaging". United States. https://doi.org/10.1016/j.ijmachtools.2022.103861. https://www.osti.gov/servlets/purl/1970366.
@article{osti_1970366,
title = {Revealing melt flow instabilities in laser powder bed fusion additive manufacturing of aluminum alloy via in-situ high-speed X-ray imaging},
author = {Guo, Qilin and Qu, Minglei and Escano, Luis I. and Hojjatzadeh, S. H. and Young, Zachary and Fezzaa, Kamel and Chen, Lianyi},
abstractNote = {Laser metal additive manufacturing technologies enable the fabrication of geometrically and compositionally complex parts unachievable by conventional manufacturing methods. However, the certification and qualification of additively manufactured parts are greatly hindered by the stochastic melt flow instabilities intrinsic to the process, which has not been explicitly revealed by direct observation. Here, we report the mechanisms of the melt flow instabilities in laser powder bed fusion additive manufacturing process revealed by in-situ high-speed high-resolution synchrotron X-ray imaging. Here we identified powder/droplet impact, significant keyhole oscillation, and melting-mode switching as three major mechanisms for causing melt flow instabilities. We demonstrated the detrimental consequences of these instabilities brought to the process, and presented new understanding on the melt flow evolution and keyhole oscillation. This work provides critical insights into process instabilities during laser metal additive manufacturing, which may guide the development of instability mitigation approaches. The results reported here are also important for the development and validation of high-fidelity computational models.},
doi = {10.1016/j.ijmachtools.2022.103861},
journal = {International Journal of Machine Tools and Manufacture},
number = ,
volume = 175,
place = {United States},
year = {Sat Feb 12 00:00:00 EST 2022},
month = {Sat Feb 12 00:00:00 EST 2022}
}
Works referenced in this record:
Ultrafast dynamics of laser-metal interactions in additive manufacturing alloys captured by in situ X-ray imaging
journal, March 2019
- Martin, Aiden A.; Calta, Nicholas P.; Hammons, Joshua A.
- Materials Today Advances, Vol. 1
Direct observation of pore formation mechanisms during LPBF additive manufacturing process and high energy density laser welding
journal, June 2020
- Hojjatzadeh, S. Mohammad H.; Parab, Niranjan D.; Guo, Qilin
- International Journal of Machine Tools and Manufacture, Vol. 153
Direct measurements of laser absorptivity during metal melt pool formation associated with powder bed fusion additive manufacturing processes
journal, August 2018
- Matthews, Manyalibo; Trapp, Johannes; Guss, Gabe
- Journal of Laser Applications, Vol. 30, Issue 3
High-resolution tomographic volumetric additive manufacturing
journal, February 2020
- Loterie, Damien; Delrot, Paul; Moser, Christophe
- Nature Communications, Vol. 11, Issue 1
Analysis of laser–melt pool–powder bed interaction during the selective laser melting of a stainless steel
journal, May 2017
- Gunenthiram, Valérie; Peyre, Patrice; Schneider, Matthieu
- Journal of Laser Applications, Vol. 29, Issue 2
Influence of thermodynamics within molten pool on migration and distribution state of reinforcement during selective laser melting of AlN/AlSi10Mg composites
journal, January 2016
- Dai, Donghua; Gu, Dongdong
- International Journal of Machine Tools and Manufacture, Vol. 100
On the role of melt flow into the surface structure and porosity development during selective laser melting
journal, September 2015
- Qiu, Chunlei; Panwisawas, Chinnapat; Ward, Mark
- Acta Materialia, Vol. 96
Limits and solutions in processing pure Cu via selective laser melting using a high-power single-mode fiber laser
journal, July 2019
- Colopi, Matteo; Demir, Ali Gökhan; Caprio, Leonardo
- The International Journal of Advanced Manufacturing Technology, Vol. 104, Issue 5-8
In situ X-ray imaging of defect and molten pool dynamics in laser additive manufacturing
journal, April 2018
- Leung, Chu Lun Alex; Marussi, Sebastian; Atwood, Robert C.
- Nature Communications, Vol. 9, Issue 1
In-Situ Monitoring of Laser Additive Manufacturing for Al7075 Alloy Using Emission Spectroscopy and Plume Imaging
journal, January 2021
- Ren, Wenjing; Zhang, Zhifen; Lu, Yi
- IEEE Access, Vol. 9
Influence of hatch spacing on heat and mass transfer, thermodynamics and laser processability during additive manufacturing of Inconel 718 alloy
journal, October 2016
- Xia, Mujian; Gu, Dongdong; Yu, Guanqun
- International Journal of Machine Tools and Manufacture, Vol. 109
Evaporation Model for Keyhole Dynamics During Additive Manufacturing of Metal
journal, December 2020
- Wang, Lu; Zhang, Yanming; Yan, Wentao
- Physical Review Applied, Vol. 14, Issue 6
Pore elimination mechanisms during 3D printing of metals
journal, July 2019
- Hojjatzadeh, S. Mohammad H.; Parab, Niranjan D.; Yan, Wentao
- Nature Communications, Vol. 10, Issue 1
Multi-physics modeling of direct energy deposition process of thin-walled structures: defect analysis
journal, March 2021
- Wang, Shuhao; Zhu, Lida; Dun, Yichao
- Computational Mechanics, Vol. 67, Issue 4
In situ synchrotron X-ray imaging of 4140 steel laser powder bed fusion
journal, June 2019
- Bobel, Andrew; Hector, Louis G.; Chelladurai, Isaac
- Materialia, Vol. 6
Revealing internal flow behaviour in arc welding and additive manufacturing of metals
journal, December 2018
- Aucott, Lee; Dong, Hongbiao; Mirihanage, Wajira
- Nature Communications, Vol. 9, Issue 1
Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones
journal, April 2016
- Khairallah, Saad A.; Anderson, Andrew T.; Rubenchik, Alexander
- Acta Materialia, Vol. 108
Critical instability at moving keyhole tip generates porosity in laser melting
journal, November 2020
- Zhao, Cang; Parab, Niranjan D.; Li, Xuxiao
- Science, Vol. 370, Issue 6520
Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging
journal, February 2019
- Cunningham, Ross; Zhao, Cang; Parab, Niranjan
- Science, Vol. 363, Issue 6429
In situ X-ray imaging of pore formation mechanisms and dynamics in laser powder-blown directed energy deposition additive manufacturing
journal, July 2021
- Wolff, Sarah J.; Wang, Hui; Gould, Benjamin
- International Journal of Machine Tools and Manufacture, Vol. 166
Effect of Laser-Matter Interaction on Molten Pool Flow and Keyhole Dynamics
journal, June 2019
- Kouraytem, Nadia; Li, Xuxiao; Cunningham, Ross
- Physical Review Applied, Vol. 11, Issue 6
In situ monitoring of selective laser melting of zinc powder via infrared imaging of the process plume
journal, February 2018
- Grasso, M.; Demir, A. G.; Previtali, B.
- Robotics and Computer-Integrated Manufacturing, Vol. 49
Volumetric additive manufacturing via tomographic reconstruction
journal, January 2019
- Kelly, Brett E.; Bhattacharya, Indrasen; Heidari, Hossein
- Science, Vol. 363, Issue 6431
Metal vapor micro-jet controls material redistribution in laser powder bed fusion additive manufacturing
journal, June 2017
- Ly, Sonny; Rubenchik, Alexander M.; Khairallah, Saad A.
- Scientific Reports, Vol. 7, Issue 1
Formation of metastable cellular microstructures in selective laser melted alloys
journal, June 2017
- Prashanth, K. G.; Eckert, J.
- Journal of Alloys and Compounds, Vol. 707
Mechanism of keyhole pore formation in metal additive manufacturing
journal, January 2022
- Wang, Lu; Zhang, Yanming; Chia, Hou Yi
- npj Computational Materials, Vol. 8, Issue 1
Multimaterial actinic spatial control 3D and 4D printing
journal, February 2019
- Schwartz, J. J.; Boydston, A. J.
- Nature Communications, Vol. 10, Issue 1
Capturing Marangoni flow via synchrotron imaging of selective laser melting
journal, May 2020
- Clark, S. J.; Leung, C. L. A.; Chen, Y.
- IOP Conference Series: Materials Science and Engineering, Vol. 861, Issue 1
Effects of sulfur concentration and Marangoni convection on melt-pool formation in transition mode of selective laser melting process
journal, October 2019
- Le, Trong-Nhan; Lo, Yu-Lung
- Materials & Design, Vol. 179
In-situ Synchrotron imaging of keyhole mode multi-layer laser powder bed fusion additive manufacturing
journal, September 2020
- Chen, Yunhui; Clark, Samuel J.; Leung, Chu Lun Alex
- Applied Materials Today, Vol. 20
On the role of powder flow behavior in fluid thermodynamics and laser processability of Ni-based composites by selective laser melting
journal, February 2019
- Gu, Dongdong; Xia, Mujian; Dai, Donghua
- International Journal of Machine Tools and Manufacture, Vol. 137
Onset of periodic oscillations as a precursor of a transition to pore-generating turbulence in laser melting
journal, December 2021
- Khairallah, Saad A.; Sun, Tao; Simonds, Brian J.
- Additive Manufacturing Letters, Vol. 1
Dynamics of pore formation during laser powder bed fusion additive manufacturing
journal, April 2019
- Martin, Aiden A.; Calta, Nicholas P.; Khairallah, Saad A.
- Nature Communications, Vol. 10, Issue 1
Transient dynamics of powder spattering in laser powder bed fusion additive manufacturing process revealed by in-situ high-speed high-energy x-ray imaging
journal, June 2018
- Guo, Qilin; Zhao, Cang; Escano, Luis I.
- Acta Materialia, Vol. 151