Sound waves generated by nanosecond and femtosecond laser ablation on different metals

Huang, Feng; Lei, Ming; Wang, Jie; Chen, Deren; Gao, Tao; Wang, Xiangfeng

doi:10.1016/j.ijleo.2018.10.104

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…During the process of engraving, the trend of ablation from the surface of the base metal had a significant impact on the sound signal pattern [10]. Due to the nature of the laser pulse, the pattern tended to be periodic, while the amplitude or energy of the signal was affected by the quantity of ablated gas ejected from the keyhole [9,13]. In contrast, the process sound pattern with a scanning speed of 1000 mm s −1 in figure 7(c) captured the irregular pattern throughout the process.…”

Section: Characteristic Of the Acoustic Signal From Laser Cleaning Pr...mentioning

confidence: 99%

“…Numerous earlier studies [9,10,13] demonstrated that during laser engraving or texturing, the quantity of plasma plume ejected from the ablated surface generates pulsed sound signals. This was owing to the fact that laser processing was performed in pulse mode.…”

Section: Characteristic Of the Acoustic Signal From Laser Cleaning Pr...mentioning

confidence: 99%

“…Even though it is not used specifically in laser cleaning applications, this method is widely used to monitor laser ablation, which is conceptually similar to laser cleaning. Huang et al [9] investigate the acoustic characteristics of nanosecond and femtosecond ablation. As the nanosecond laser energy increased, the study revealed that the amplitude of the acoustic signal increased slowly at first, changed swiftly in the middle, and reached a plateau at the end.…”

Section: Introductionmentioning

confidence: 99%

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Mel-frequency cepstral and spectral flux analysis of the acoustic signal for real-time status monitoring of laser cleaning

Aleem,

Yusof,

Quazi

et al. 2023

Mater. Res. Express

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Due to the fact that the laser-based cleaning process is quick, efficient, and environmentally friendly, it has been utilized in a various industry, which has increased the number of studies pertaining to this process. In addition to process optimization, the real-time monitoring system was essential in preventing the overexposure of the laser beam to the cleansed surface, which would result in an engraving effect. This article demonstrated the analysis of the acquired sound signal to identify an overexposed laser beam during laser cleaning. In order to accomplish the aim of this work, the corroded boron steel plate was prepared. The laser cleaning procedure involved a four-loop laser scan. Variable scanning speeds between 100 and 1,000 mm/s were configured. Concurrently, the acoustic signal within the frequency range of 20 Hz to 10 kHz was acquired. The results indicate that the process with a scanning speed of 1000 mm/s recorded the clear surface without morphological change on the cleaned area, whereas an unacceptable deep gouge was formed during the second and third loops of the process with speeds of 100 mm/s and 300 mm/s, respectively. According to an analysis of the acquired sound signal, the trend of the Mel Frequency Cepstral Coefficient (MFCC) was indicative of the existence of the ablated corroded substrate. In addition, the spectral flux can provide important information regarding the formation of a deep groove on a cleansed surface. This research demonstrates the feasibility of using the auditory signal to monitor the laser cleaning process. By characterizing the acoustic signal feature, it is possible to detect the completion of the cleaning process before the morphological change of the cleaned area existed. With further development, it was possible that this method would become the most efficient, resilient, and demanding in the future.

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Section: Characteristic Of the Acoustic Signal From Laser Cleaning Pr...mentioning

confidence: 99%

Section: Characteristic Of the Acoustic Signal From Laser Cleaning Pr...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mel-frequency cepstral and spectral flux analysis of the acoustic signal for real-time status monitoring of laser cleaning

Aleem,

Yusof,

Quazi

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

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“…As the molten material absorbs more energy from the laser, a plume is formed from the evaporated particles. This process also compresses the background gas and a shockwave is generated [25]. Laser shock peening (LSP) offers an after treatment solution for laser surface texturing.…”

Section: Processes Related To Laser Ablationmentioning

confidence: 99%

A Review on Friction Reduction by Laser Textured Surfaces in Internal Combustion Engines

et al. 2022

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The internal combustion engine will be required as a bridge-technology in the upcoming decades to achieve a significant reduction in local emissions in the mobility, and logistics sector. Alternative fuel technologies will present new mechanical engineering challenges, including increasing efficiency and reducing mechanical losses. Textured surfaces with appropriate manufacturing parameters can enhance lubrication, and reduce friction in sliding and rolling contacts, e.g., journal bearings, or the piston ring -cylinder subsystem. This paper gives an overview of 80 scientific works related to laser surface technologies, with an emphasis on surface texturing for friction reduction from the viewpoint of engine development. The most common texture types, further directions, and general challenges are highlighted in the summary.

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“…CW and ultra-short laser sources present remarkable differences in optical damage [5]. Particularly, potential actions of optical nonlinearities [6], shock waves [7], plasma phenomena [8], or temperature conditions [9] can be responsible for the dynamics of photoenergy transfer exhibited by high-irradiance phenomena. On the other hand, the pulse repetition rate in photodamage can play a crucial role associated with the physical mechanisms of thermal transport in optical materials [10].…”

Section: Introductionmentioning

confidence: 99%

Sequential Photodamage Driven by Chaotic Systems in NiO Thin Films and Fluorescent Human Cells

et al. 2020

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A laser ablation process assisted by the feedback of a sensor with chaotic electronic modulation is reported. A synchronous bistable logic circuit was analyzed for switching optical signals in a laser-processing technique. The output of a T-type flip-flop configuration was employed in the photodamage of NiO films. Multiphotonic effects involved in the ablation threshold were evaluated by a vectorial two-wave mixing method. A photoinduced thermal phenomenon was identified as the main physical mechanism responsible for the nonlinearity of index under nanosecond irradiation at 532 nm wavelength. Comparative experiments for destroying highly transparent human cells were carried out. Potential applications for developing hierarchical functions yielding laser-induced controlled explosions with immediate applications for biomedical photothermal processes can be contemplated.

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Sound waves generated by nanosecond and femtosecond laser ablation on different metals

Cited by 7 publications

References 14 publications

Mel-frequency cepstral and spectral flux analysis of the acoustic signal for real-time status monitoring of laser cleaning

Mel-frequency cepstral and spectral flux analysis of the acoustic signal for real-time status monitoring of laser cleaning

A Review on Friction Reduction by Laser Textured Surfaces in Internal Combustion Engines

Sequential Photodamage Driven by Chaotic Systems in NiO Thin Films and Fluorescent Human Cells

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