The Effect of Spot Size Combination Mode on Ablation Morphology of Aluminum Alloy by Millisecond-Nanosecond Combined-Pulse Laser

Yuan, Boshi; Zhang, Ye; Zhang, Wei; Yuan, Dong; Jin, Guangyong

doi:10.3390/ma11081419

Cited by 19 publications

(6 citation statements)

References 26 publications

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“…However, in the case presented in this paper, the ejection laser pulse is significantly larger than the melt pool and could be considered as a uniform distribution of energy over the melt pool, restricting the annular flow of Robin and Nordin. Recent work by Yuan et al [47] has shown material ejection in cases where the ejection pulse diameter is both smaller and larger than the melt pool diameter. Yuan et al's results are consistent with our own where there is no significant redeposition of recast material at the hole edge.…”

Section: Further Workmentioning

confidence: 99%

Increasing the efficiency of material removal using dual laser micromachining

Alkhawaldeh

Coupland

Jones

2020

Int J Adv Manuf Technol

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A continuous wave melting laser combined with a nanosecond ejection laser has been shown to improve the material removal efficiency by a factor of 2 to 8 compared with laser ablation processes reported in the literature. The decrease in the energy required for the combined lasers is primarily due to the optimisation of the irradiation time in the melting process, which is responsible for the majority of the total energy. For the laser used in this study, the optimal interaction time corresponding to the highest melting efficiency was found at 9-ms melting time, and this value is compared with results derived from a onedimensional heating model. Metallurgical images of only melting and the produced hole after introducing the ejection pulse for the most efficient melting were presented as evidence of melt ejection. The results show that approximately 90% of the melt pool is ejected with little redeposited material at the periphery of the hole.

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Section: Further Workmentioning

confidence: 99%

Increasing the efficiency of material removal using dual laser micromachining

Alkhawaldeh

Coupland

Jones

2020

Int J Adv Manuf Technol

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“…Furthermore, the production of colloidal suspensions of nanoparticles can be accomplished by a process known (PLAL) [8]. The production of nanoparticles with PLAL occurs through a single top-down procedure known as the dispersion approach [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nano Silicon Using Lasers

Muaath J. Mahmoud,

Bassam G. Rasheed

2024

IJNeaM

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Two lasers of the same wavelength (1.06 μm) and various specifications were employed to synthesize silicon nanoparticles. The experimental data reveal the formation of stable silicon nanoparticles with different features such as UV-vis absorption, photoluminescence spectrum, Raman spectrum, Zeta potential, and SEM morphology. Theoretical simulations using COMSOL software were adopted to estimate the surface temperature distribution at the silicon surface and underneath. It is found that maximum temperatures of about (5700 K) and (4600 K) were generated when a Q-switched laser pulse of (10 ns) and fiber laser pulse of (127 ns) were used, respectively. While the recoil pressure at the silicon surface was (6.5*105 N/m2) and (1*103 N/m2) when Nd:YAG and fiber laser were used respectively. It found that increasing the laser energy for Nd:YAG laser and fiber laser power leads to a blue shift of the absorption spectra while the absorption intensity increases with the number of laser pulses and irradiation time. Raman spectroscopy for the prepared silicon nanoparticles was carried out. The Raman peaks for silicon nanoparticles reveal the formation of amorphous silicon. These peaks were observed at (482) and (475 cm-1) when Nd:YAG and fiber lasers were used to produce those nanoparticles. While the photoluminescence of the prepared silicon nanoparticles exhibits peaks at (457 nm) and (495 nm) for Nd:YAG and fiber lasers. The zeta potential reveals that silicon nanoparticle stability is greater for nanoparticles produced by fiber lasers (27 mv) than those produced by Nd:YAG lasers (17 mv) for three months. The corresponding silicon nanoparticle sizes refer to (3.8 nm) and (6 nm). Potential applications of silicon nanoparticles in optoelectronics and biological imaging can be conducted due to the controllable laser micro/nano machining process.

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“…Xueming Lv [8,9] et al researched the damage and through-hole energy-density threshold of the irradiation between silicon and ms-ns combined-pulse laser with the pulse duration of 1ms superposed by 5ns. Although the above experimental researches have been studied, the plasma and laser-supported absorption wave(LSAW) were seldom related, Boshi Yuan [10,11] et al investigated the ablation morphology and plasma of the interaction between ms-ns combined-pulse laser(CPL) with pulse duration of 1ms superposed by 10ns and the aluminum alloy with different spot size and pulse delay to reveal the physical mechanism of laser processing, they found that the larger the plasma plume radius, the larger the ablation radius. Yunxiang Pan [12,13] et al investigated the ablation morphology under the irradiation of ms-ns combined-pulse laser and BK7 glass to obtain the optimal pulse delay for highest processing efficiency, the laser-supported combustion wave is analyzed to have a contribution to thermal radiation.…”

Section: Introductionmentioning

confidence: 99%

The acceleration phenomenon of shock wave induced by millisecond-nanosecond combined-pulse laser on silicon

Li²,

Zhao³

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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Silicon is an indispensable raw material in the manufacture of electronic devices, and it is widely used in aerospace field. We study the motion morphology and velocity of LSW induced by millisecond-nanosecond combined-pulse laser with different pulse delay and laser energy density irradiating silicon based on the method of laser shadowgraphy. Experimental results show that when the pulse delay is 2.4 ms, the millisecond(ms) and nanosecond(ns) laser energy density is 301 J cm −2 and 12 J cm −2 , respectively, the velocity of shock wave is 1.1 times faster than that induced by single ns pulse laser. It is inferred that the shock wave propagates in the plasma is faster than that in air. The results of this research can provide a reference for the field of optimized laser propulsion.

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The Effect of Spot Size Combination Mode on Ablation Morphology of Aluminum Alloy by Millisecond-Nanosecond Combined-Pulse Laser

Cited by 19 publications

References 26 publications

Increasing the efficiency of material removal using dual laser micromachining

Increasing the efficiency of material removal using dual laser micromachining

Synthesis of Nano Silicon Using Lasers

The acceleration phenomenon of shock wave induced by millisecond-nanosecond combined-pulse laser on silicon

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