Study of the of ultrasound vibrations influence on the liquid metal flow structure and shape of the AISI 316L stainless steel melt pool
Authors: Nikiforov S.A., Shvarts I.V., Gorunov A.I., Gilmutdinov A.Kh.
Published in issue: #11(155)/2024
DOI: 10.18698/2308-6033-2024-11-2398
Category: Mechanics | Chapter: Mechanics of Liquid, Gas, and Plasma
The paper presents a two-dimensional single-phase mathematical model of the AISI 316L stainless steel laser heating, taking into account convective and radiation heat losses under the medium periodic disturbances, as well as its numerical implementation in the ANSYS Fluent software package. It studies the liquid metal flow structure without ultrasonic influence and with introduction of the ultrasonic vibrations of different modulation frequencies (20, 40 and 60 kHz) in the melt pool. The paper shows the effect of different ultrasound modulation frequencies on the melt flow rate and temperature in the pool, compares them with the classical laser welding method. Averaged indicators of the scalar field of velocity magnitudes and their dispersion are analyzed for each computation case. For qualitative analysis, a map of correspondences between computation without ultrasound exposure and computation with the ultrasonic vibrations introduction is provided. The computation results are verified by analyzing the microstructure compliance after laser treatment according to the indirect characteristic features.
EDN FGOSGW
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