Irradiation effects of continuous laser on liquid tank: A natural convection study

Jiao, Lei; Li, J.S.; Yuan, Chao; Jiang, Houman; Zhao, Guangyao

doi:10.1016/j.ijheatmasstransfer.2014.05.061

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…TiC and Ni-Ti intermetallic were subsequently synthesized in the laser melted pool. Studies have confirmed that the Marangoni convection of the laser melted pool plays a key role in mass transfer and chemical composition homogenization in the laser melted pool [ 10 , 11 , 12 , 13 , 14 ]. Therefore, the XRD results indicated that the Marangoni convection occurred in the laser melted pool and led to the homogenization of the chemical composition of both the preplaced layer and the melted substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the manufacturing process has had an important influence on the size and distribution of the reinforcement and the properties of MMC coatings. It has been confirmed in both theory and practice that convection behavior has a strong effect on MMC coatings [ 10 , 11 , 12 , 13 , 14 ]. In particular, the effect of convection on the homogenization of chemical composition [ 15 ], surface roughness [ 16 ] and geometrical characteristics [ 10 , 17 , 18 ] has been discussed.…”

Section: Introductionmentioning

confidence: 91%

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Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding

Liu

Ding

et al. 2017

Materials

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In this paper, a TiC reinforcement metal matrix composite coating is produced using nickel and graphite mixing powder on the surface ofTi-6Al-4V alloy by laser radiation. The microstructure of the coatings is investigated by XRD, SEM and EDS. Results show that most of the TiC phase is granular, with a size of several micrometers, and a few of the TiC phases are petals or flakes. At the cross-section of the coatings, a few special TiC patterns are found and these TiC patterns do not always occur at the observed cross-section. The even distribution of the TiC phase in the coatings confirms that the convection of the laser-melted pool leads to the homogenization of titanium atoms from the molten substrate, and carbon atoms from the preplace powder layer, by the mass transfer. The characteristics of the TiC pattern confirm that the morphology and distribution of the primary TiC phase could be influenced by convection. Two main reasons for this are that the density of the TiC phase is lower than the liquid melt, and that the primary TiC phase precipitates from the pool with a high convection speed at high temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding

Liu

Ding

et al. 2017

Materials

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“…The silicon film surface absorbs energy from the laser, and the surface temperature increases rapidly. Heat transfer occurs through heat conduction to the material interior, and heat dissipation occurs through radiation and natural convection at the material interface [ 21 , 22 ]. Meanwhile, the evaporation of materials can also lead to energy loss.…”

Section: Methodsmentioning

confidence: 99%

Influences of Initial Surface Conditions on Response Characteristics of Amorphous Silicon Films to Nanosecond Laser Irradiation

Ren

Zhang

2021

Micromachines

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Although laser-produced micro-/nano-structures have been extensively studied, the effects of the initial surface conditions on the formed micro-/nano-structures have rarely been investigated. In this study, through nanosecond pulsed laser irradiation of unpolished and polished amorphous silicon films, entirely different surface characteristics were observed. The effects of laser irradiation parameters, such as repetition frequency, beam overlap ratio, and scanning velocity, on the surface characteristics were investigated, followed by the characterization of surface roughness, energy-dispersive X-ray spectroscopy, and Raman spectroscopy of the irradiated surfaces. For the unpolished surface, novel micro-protrusions were generated after laser irradiation, whereas no such micro-protrusions were formed on the polished surface. The experimental results indicated that the height of the micro-protrusions could be tuned using laser irradiation parameters and that laser irradiation promoted the crystallization of the amorphous silicon film. Moreover, the formation mechanism of the micro-protrusions was linked to fluctuations of the solid–liquid interface caused by continuous laser pulse shocks at higher repetition frequencies. The findings of this study suggest important correlations between the initial surface conditions and micro-/nano-structure formation, which may enhance our fundamental understanding of the formation of micro-/nano-structures.

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Visualizing heat-convection using laser spot step heating thermography

Bedoya,

Rojas-Trigos,

Hernández-Wong

et al. 2024

International Journal of Thermal Sciences

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Irradiation effects of continuous laser on liquid tank: A natural convection study

Cited by 4 publications

References 26 publications

Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding

Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding

Influences of Initial Surface Conditions on Response Characteristics of Amorphous Silicon Films to Nanosecond Laser Irradiation

Visualizing heat-convection using laser spot step heating thermography

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