Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications

Иванов, И. А.; Дуб, В. С.; Karabutov, Alexander A.; Cherepetskaya, Elena B.; Бычков, А. С.; Kudinov, I. A.; Gapeev, A. A.; Krivilyov, M. D.; Simakov, Nikolay N.; Gruzd, Svetlana A.; Ломаев, С. Л.; Dremov, V. V.; Chirkov, P. V.; Kichigin, Roman M.; Karavaev, A. V.; Anufriev, Maxim Yu.; Купер, К. Э.

doi:10.1038/s41598-021-02895-8

Cited by 14 publications

(8 citation statements)

References 74 publications

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“…Since no changes in the shape of the molten pool were observed, it is assumed that the change in the grain size distribution is caused by the alignment (temporal stabilization) of the velocity field near the solidification front. Based on the performed theoretical and experimental study, one can conclude that the effect of the external alternating field is small in comparison with the effect of laser ultrasonic generation [5]. The EM field dissipates intensively after its interference with the fields generated by eddy currents in the molten pool.…”

Section: Parametermentioning

confidence: 91%

“…In the previous work [5], the authors considered the effect of laser-induced ultrasound on the microstructure of laser-processed stainless steel. Significant grain refinement was confirmed experimentally in steel plates processed by the sub-MHz intensity-modulated pulsed laser.…”

Section: Experimental Methodology and Microstructure Assessmentmentioning

confidence: 99%

“…In [2][3][4][5], the authors suggest various approaches for adjustment processing parameters in laser techniques, including selective laser manufacturing (SLM) to enhance the performance characteristics of metal parts. The velocity of hydrodynamic flow is one of the most important physical parameters in the molten pool formed by a laser source.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Effect of Magnetic Field on Solidification of Stainless Steel in Laser Surface Processing and Additive Manufacturing

Gruzd

Ломаев

Simakov

et al. 2022

Metals

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The problem of surface processing and microstructure refinement in stainless steels in laser surface processing in the presence of an external magnetic field has been studied experimentally and theoretically. The effect of both alternating and permanent magnetic fields is discussed. The experimental part includes microstructure assessment of a thin stainless plate annealed by a quasi-continuous laser in the presence of an electromagnetic acoustic transducer. Complementary analytical calculus and numerical simulations of complex transport phenomena in the melting zone are performed. Based on the received data, the effect of the electromagnetic field on the molten zone under laser melting conditions is evaluated and quantified. The obtained results are relevant to laser surface hardening and additive manufacturing.

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Section: Parametermentioning

confidence: 91%

Section: Experimental Methodology and Microstructure Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the Effect of Magnetic Field on Solidification of Stainless Steel in Laser Surface Processing and Additive Manufacturing

Gruzd

Ломаев

Simakov

et al. 2022

Metals

Self Cite

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“…Laser-beam-generated ultrasound is suitable for various analytical investigations in material sciences. The metal industry uses this technique for measurement and detection of, e.g., grain size, defects, anisotropy, and mechanical properties [55,56], but biomedical applications are in the very early stages [57]. In the early 2000s, the discovery of microwave-induced ultrasonic waves initiated the utilization of thermoacoustic ultrasound generation [58].…”

Section: Theoretical Background and Instrumentationmentioning

confidence: 99%

Mechanochemical Degradation of Biopolymers

Jicsinszky,

Bucciol,

Chaji

et al. 2023

Molecules

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Mechanochemical treatment of various organic molecules is an emerging technology of green processes in biofuel, fine chemicals, or food production. Many biopolymers are involved in isolating, derivating, or modifying molecules of natural origin. Mechanochemistry provides a powerful tool to achieve these goals, but the unintentional modification of biopolymers by mechanochemical manipulation is not always obvious or even detectable. Although modeling molecular changes caused by mechanical stresses in cavitation and grinding processes is feasible in small model compounds, simulation of extrusion processes primarily relies on phenomenological approaches that allow only tool- and material-specific conclusions. The development of analytical and computational techniques allows for the inline and real-time control of parameters in various mechanochemical processes. Using artificial intelligence to analyze process parameters and product characteristics can significantly improve production optimization. We aim to review the processes and consequences of possible chemical, physicochemical, and structural changes.

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“…To apply this contact-type technique, implementation problems must be solved, because it is difficult to ensure stable effects on the moving melt pool with its three-dimensional trajectory. Recently, delivering localized ultrasound energy inside the melt pool via intensity-modulated laser irradiation was investigated for in-situ grain refinement 13 . As a proof of concept, the technique was verified on a stainless-steel plate, showing that the intensity-modulated laser can simultaneously perform surface melting and ultrasound generation.…”

Section: Introductionmentioning

confidence: 99%

Pulsed laser-assisted additive manufacturing of Ti-6Al-4V for in-situ grain refinement

Yoon

Park

et al. 2022

Sci Rep

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Metal additive manufacturing (AM) enables rapid customization of complex parts. However, it leads to forming of columnar grain structures which give the AM parts anisotropic properties. In this study, we propose a pulsed laser-assisted AM (PLAAM) technique for in-situ grain refinement of Ti-6Al-4V parts. A nanosecond pulsed laser was focused onto a melt pool to generate a favorable environment for the promotion of fine equiaxed grains. The PLAAM technique provided an average prior-β grain size of 549.6 μm, compared to that of 1297 μm provided by the conventional AM technique. Moreover, the maximum value of multiples of uniform distribution of the β phase decreased from 16 to 7.7 when using the PLAAM technique, which indicates a weakened crystallographic texture. These changes confirm that the proposed PLAAM technique promotes finer and more equiaxed prior-β grains. Furthermore, because the proposed technique is a non-contact technique, it can be applied to existing processes without adjusting tool paths.

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Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications

Cited by 14 publications

References 74 publications

Analysis of the Effect of Magnetic Field on Solidification of Stainless Steel in Laser Surface Processing and Additive Manufacturing

Analysis of the Effect of Magnetic Field on Solidification of Stainless Steel in Laser Surface Processing and Additive Manufacturing

Mechanochemical Degradation of Biopolymers

Pulsed laser-assisted additive manufacturing of Ti-6Al-4V for in-situ grain refinement

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