Effect of Laser-Matter Interaction on Molten Pool Flow and Keyhole Dynamics
By N. Kouraytem, Xuxiao Li, Ross W Cunningham, Cang Zhao, N. Parab, T. Sun, Anthony D. Rollett, A. Spear, W. Tan. Physical Review Applied, 2019
136 citations recorded by the source corpus.
Laser-induced keyholing occurs in additive manufacturing and welding processes, but the keyhole dynamics have not been well understood. A multi-phase and multi-physics numerical model is used to predict the keyhole shapes recorded in the experimental observations and to predict transient and non-uniform distributions of laser absorption, temperature, and flow velocity in the process. When compared against data from a state-of-the-art dynamic X-ray radiography technique, good agreement is found for the keyhole shapes and fluctuation of the gas-liquid interface, thereby validating the simulation method. A detailed discussion is then given to elucidate the effects of laser absorption on the dynamic behavior of the front and rear keyhole walls. A quantitative comparison of different driving forces on the keyhole is also given to evaluate their significance to the keyhole dynamics.
Subfields: Biomedical Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/df9d88801f970b176fb204ccebece26f6a29d55e
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In Mechanical Engineering
Citations in the corpus
- Modeling process–structure–property relationships in metal additive manufacturing: a review on physics-driven versus data-driven approaches (2020, background): “, balling [9–11], keyholing [12, 13] and spattering [14], that lead to mesoscale defects such as lack-of-fusion and porosity [15].”