Studies on pulsed Nd:YAG laser cutting of thick stainless steel in dry air and underwater environment for dismantling applications

Choubey, Ambar; Jain, R. K.; Ali, Sabir; Singh, Ravindra; Vishwakarma, S.C.; Agrawal, Dinesh Kumar; Arya, Rajesh; Kaul, R.; Upadhyaya, B.N.; Oak, S. M.

doi:10.1016/j.optlastec.2015.02.007

Cited by 37 publications

(8 citation statements)

References 41 publications

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“…For this, it is important to characterize the aerosol particles -emitted upstream from the HEPA filters -consistent with the type of operation that needs to be performed and the proposed tool . Many studies are designed to characterize the kerf geometry from the stainless steel cutting by high power lasers (Choubey et al, 2015;Ghany and Newishy, 2005).…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…In contrast to Ti:sapphire amplifiers, there are microsecond [51,52] or millisecond [53][54][55] lasers, which are used in medical or industrial applications. For these long-pulse lasers, the spontaneous emission term given in Equation (18) should be included in the calculation, because the duration of the amplification process is similar to or longer than the fluorescence lifetime of the gain medium [43].…”

Section: Pumping and Spontaneous Emissionmentioning

confidence: 99%

Modeling and Analysis of High-Power Ti:sapphire Laser Amplifiers–A Review

et al. 2019

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We have introduced several factors that can be useful for the modeling and analysis of high-power Ti:sapphire laser amplifiers. The amplification model includes the phase distortion effect caused by the atomic phase shift (APS) in gain medium and the thermal-induced phase distortion effect caused by the high-average-power amplification. We have provided an accurate amplification model for the development of ultra-high-intensity and high-average-power lasers.

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“…Laser cutting is a popular application among laser-aided manufacturing [ 4 , 7 , 8 ] since it has various advantages, such as being contact-free process, having high-energy concentration, fast processing time, a small Heat-Affected Zone (HAZ), and applicability to almost every material [ 9 ]. Thus, laser cutting has been applied to many different types of materials, such as sandwiched composites [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], reinforced composites [ 9 , 24 , 25 , 26 , 27 , 28 , 29 ], and metals [ 4 , 6 , 8 , 13 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]. Laser spot cutting is using a laser to separate a workpiece into two or more pieces [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

Lee

2018

Materials

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An inspection process using a Spring Contact Probe (SCP) is an essential step in the semiconductor-manufacturing process. Many plungers, which are the main body of the SCP, are manufactured by a stamping process. After the stamping process, mechanical cutting is applied and the plunger body may be damaged. Thus, to improve cut quality and productivity while minimizing body damage, laser spot cutting can be used. To fully utilize this technology, it is necessary to investigate interaction characteristics of beryllium copper (BeCu) during laser spot cutting. Effects of a total irradiated laser-pulse energy (1 mJ~1000 mJ) and pulse duration (100 ns~8 ns) on the material-removal zone, thermal depth, and crater size are examined. The crater size can be affected by the localization of heating dominantly. An incubation model is applied to investigate the correlation between crater size and laser-pulse energy. Surface morphology characteristics such as edge separation, small particles, spatter motion, and soaring-up motion are observed.

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Studies on pulsed Nd:YAG laser cutting of thick stainless steel in dry air and underwater environment for dismantling applications

Cited by 37 publications

References 41 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

Modeling and Analysis of High-Power Ti:sapphire Laser Amplifiers–A Review

Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

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