Performance optimization of water-jet assisted underwater laser cutting of AISI 304 stainless steel sheet

Mullick, Suvradip; Madhukar, Yuvraj K.; Roy, Subhransu; Nath, Ashish Kumar

doi:10.1016/j.optlaseng.2016.02.022

Cited by 27 publications

(6 citation statements)

References 15 publications

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“…Indeed, it has been shown (Mullick et al, 2016) that for a constant laser power, a greater cutting speed will cause a lower temperature rise of the piece to be cut thus leading to an increase in the viscosity of the molten layers of the stainless steel. This increased viscosity will mitigate the ejection of molten metal in the aerosol form.…”

Section: Laser Cutting In Airmentioning

confidence: 99%

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Peillon

Fauvel

Chagnot

et al. 2017

Aerosol Air Qual. Res.

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The goal of this article is to provide results on aerosol particles emissions of a laser Nd:YAG cutting technique used for the decommissioning of nuclear facilities. In particular, the study aims at characterizing the aerosol emitted during the cutting of steel specimens of different thicknesses and to study particulate emissions for cuts in air and under water. To do so, we calculate the emitted aerosol mass per unit area of cut. Overall, it was found that the mass of aerosol per unit area of cut by laser cutting decreases when the laser power and cutting speed increase. We also examine the performance of the height of the water column above the cut on the particle collection efficiency. We found that the driving phenomenon for particle collection is the scrubbing of particles by bubbles present in the water column. When cuts are realized under water, the production of aerosol particles mass per unit area of cut is reduced by a factor of 10 and limited below 70 g m -2 .

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Section: Laser Cutting In Airmentioning

confidence: 99%

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Peillon

Fauvel

Chagnot

et al. 2017

Aerosol Air Qual. Res.

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“…Water is most commonly used as a laser ablation assisting liquid since it is cheap, harmless, and recyclable [ 20 , 28 ]. Water can be introduced into the ablation zone in multiple ways: by submerging the workpiece into standing [ 22 , 26 , 29 , 30 ] or flowing water [ 20 , 21 , 31 , 32 ]; by guiding a laser beam in the water jet [ 33 , 34 ]; or by spraying water mist [ 18 ] or a water jet [ 19 , 28 ] next to the laser beam. Most studies have investigated laser ablation with workpieces submerged into a standing or low-velocity liquid flow with a liquid layer thickness of a few to tens of millimetres.…”

Section: Introductionmentioning

confidence: 99%

Efficient Water-Assisted Glass Cutting with 355 nm Picosecond Laser Pulses

et al. 2022

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In this study, the cutting of borosilicate glass plates in ambient air and water with a 355 nm wavelength picosecond laser was carried out. Low (2.1–2.75 W) and high (15.5 W) average laser power cutting regimes were studied. Thorough attention was paid to the effect of the hatch distance on the cutting quality and characteristic strength of glass strips cut in both environments. At optimal cutting parameters, ablation efficiency and cutting rates were the highest but cut sidewalls were covered with periodically recurring ridges. Transition to smaller hatch values improved the cut sidewall quality by suppressing the ridge formation, but negatively affected the ablation efficiency and overall strength of glass strips. Glass strips cut in water in the low-laser-power regime had the highest characteristic strength of 117.6 and 107.3 MPa for the front and back sides, respectively. Cutting in a high-laser-power regime was only carried out in water. At 15.5 W, the ablation efficiency and effective cutting speed per incident laser power increased by 16% and 22%, respectively, compared with cutting in water in a low-laser-power regime.

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“…Moreover, waterjet-guided laser machining equipment is generally expensive and has high maintenance costs, which limits the application of this technology in the manufacturing industry [ 25 ]. To avoid these problems, Madhukar and Mullick et al [ 26 , 27 , 28 , 29 , 30 , 31 ] proposed a coaxial waterjet-assisted laser machining method. This method is different from waterjet-guided laser machining.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Coaxial Waterjet-Assisted Laser Scanning Machining of Nickel-Based Special Alloy

Wang

Yuan

et al. 2023

Micromachines

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The problems of the recast layer, oxide layer, and heat-affected zone (HAZ) in conventional laser machining seriously impact material properties. Coaxial waterjet-assisted laser scanning machining (CWALSM) can reduce the conduction and accumulation of heat in laser machining by the high specific heat capacity of water and can realize the machining of nickel-based special alloy with almost no thermal damage. With the developed experimental setup, the laser ablation threshold and drilling experiments of the K4002 nickel-based special alloy were carried out. The effects of various factors on the thermal damage thickness were studied with an orthogonal experiment. Experimental results have indicated that the ablation threshold of K4002 nickel-based special alloy by a single pulse is 4.15 J/cm2. The orthogonal experiment results have shown that the effects of each factor on the thermal damage thickness are in the order of laser pulse frequency, waterjet speed, pulse overlap rate, laser pulse energy, and focal plane position. When the laser pulse energy is 0.21 mJ, the laser pulse frequency is 1 kHz, the pulse overlap is 55%, the focal plane position is 1 mm, and the waterjet speed is 6.98 m/s, no thermal damage machining can be achieved. In addition, a comparative experiment with laser drilling in the air was carried out under the same conditions. The results have shown that compared with laser machining in the air, the thermal damage thickness of CWALSM is smaller than 1 μm, and the hole taper is reduced by 106%. There is no accumulation and burr around the hole entrance, and the thermal damage thickness range is 0–0.996 μm. Furthermore, the thermal damage thickness range of laser machining in the air is 0.499–2.394 μm. It has also been found that the thermal damage thickness is greatest at the entrance to the hole, decreasing as the distance from the entrance increases.

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Performance optimization of water-jet assisted underwater laser cutting of AISI 304 stainless steel sheet

Cited by 27 publications

References 15 publications

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Aerosol Characterization and Particle Scrubbing Efficiency of Underwater Operations during Laser Cutting of Steel Components for Dismantling of Nuclear Facilities

Efficient Water-Assisted Glass Cutting with 355 nm Picosecond Laser Pulses

Experimental Study on Coaxial Waterjet-Assisted Laser Scanning Machining of Nickel-Based Special Alloy

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