Effect of Laser-Matter Interaction on Molten Pool Flow and Keyhole Dynamics

Kouraytem, Nadia; Li, Xuxiao; Cunningham, Ross; Zhao, Cang; Parab, Niranjan; Sun, Tao; Rollett, Anthony D.; Spear, Ashley D.; Tan, Wenda

doi:10.1103/PhysRevApplied.11.064054

Title: Effect of Laser-Matter Interaction on Molten Pool Flow and Keyhole Dynamics

Journal Article · 24 June 2019 · Physical Review Applied

DOI: https://doi.org/10.1103/PhysRevApplied.11.064054 · OSTI ID:1572772

Kouraytem, Nadia ^[1]; Li, Xuxiao ^[1]; Cunningham, Ross ^[2]; Zhao, Cang ^[3]; Parab, Niranjan ^[3]; Sun, Tao ^[3]; Rollett, Anthony D. ^[2]; Spear, Ashley D. ^[1]; Tan, Wenda ^[1]

Univ. of Utah, Salt Lake City, UT (United States)
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)

Laser-induced keyholing occurs in additive manufacturing and welding processes, but the keyhole dynamics have not been well understood. A multiphase and multiphysics numerical model is used to predict the keyhole shapes recorded in the experimental observations and to predict transient and nonuniform 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. In conclusion, a quantitative comparison of different driving forces on the keyhole is also given to evaluate their significance to the keyhole dynamics.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: U.S. Department of Defense (DOD); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1572772

Alternate ID(s):: OSTI ID: 1546284

Journal Information:: Physical Review Applied, Vol. 11, Issue 6; ISSN 2331-7019

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 88 works

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