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Photonics
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Ultrafast Laser Irradiation in Surface Engineering and Tribology
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Ultrafast Laser Irradiation in Surface Engineering and Tribology

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (10 June 2023) | Viewed by 6123

Special Issue Editors

Dr. Yanhu Zhang

E-Mail Website
Guest Editor
Institute of Advanced Manufacturing and Modern Equipment Technology, School of Mechanical Engineering, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
Interests: laser micromachining; tribology; piezoelectrics; ultrasonic motors; cryogenics; measurement
Special Issues, Collections and Topics in MDPI journals
Dr. Jinghu Ji

E-Mail Website
Guest Editor
School of Mechanical Engineering, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
Interests: laser micromachining; surface engineering; friction dynamics of mechanical systems; and mechanical seals
Dr. Hao Fu

E-Mail Website
Guest Editor
Institute of Advanced Manufacturing and Modern Equipment Technology, School of Mechanical Engineering, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, China
Interests: laser micro-nano fabrication; laser cleaning; tribology of surface texture; tribology in sheet metal forming; tribology in power machinery, etc

Special Issue Information

Dear Colleagues,

Ultrafast lasers in various engineering applications are attractive due to their green-manufactured, environmentally friendly, highly efficient, cost-effective, and fracture-resistant characteristics. Power density and irradiation duration can be controlled via the smart regulation of machining parameters and the assisted fields or mediums, which are continually sought after in physical/materials sciences, as well as chemical, energy, mechanical, and bioengineering fields. Additionally, potentially targeted materials could include metals, alloys, ceramics, polymers, composites, and biological tissues. These processes have complex mechanisms involving laser physics interactions with targeted substances, not limited to melt, solidification, vaporization, plasma formation, or the adjustment of their effective functions of proportion.

This Special Issue aims to promote the generation, transmission, modulation, signal processing, and switching control of industrial lasers, and various applications of laser machining technology both in simulations and experiments.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: laser physics, laser control, beam shaping, measurement, laser machining (e.g., cleaning, polishing, peening, texturing, cutting, drilling, welding, and cladding), and applied technologies in surface engineering and tribology.

We look forward to receiving your contributions.

Dr. Yanhu Zhang
Dr. Jinghu Ji
Dr. Hao Fu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • laser control
  • beam shaping
  • laser parameters
  • laser measurement
  • laser processing
  • ultrafast laser, surface engineering, tribology

Published Papers (4 papers)

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Research

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16 pages, 5064 KiB  
Article
Process Parameters Analysis of Laser Phase Transformation Hardening on the Raceway Surface of Shield Main Bearing
by Peiyu He, Yi Ding, Shiying Jiang, Hengjie Zhang, Tianyu Shen and Yun Wang
Photonics 2023, 10(3), 287; https://doi.org/10.3390/photonics10030287 - 09 Mar 2023
Cited by 1 | Viewed by 1095
Abstract
The main bearing of the shield machine has a huge structure and severe service conditions, which are prone to wear and fatigue damage. To improve the anti-wear and anti-fatigue ability of the raceway surface of the shield main bearing, laser transformation hardening under [...] Read more.
The main bearing of the shield machine has a huge structure and severe service conditions, which are prone to wear and fatigue damage. To improve the anti-wear and anti-fatigue ability of the raceway surface of the shield main bearing, laser transformation hardening under different parameters of the shield main bearing raceway material 42CrMo steel was researched. The effects of laser power and scanning speed on the phase transformation of 42CrMo steel and the depth of the hardened layer were studied. The numerical model was verified using the theoretical and experimental results. Orthogonal tables of laser processing parameters are established. The results show that the depth of the hardened raceway layer increases with increased laser power and decreased laser scanning speed. According to the results of orthogonal primary and secondary analyses and fuzzy comprehensive evaluation, the depth of the hardened layer of the raceway can reach 1.08 mm, and the hardened layer is relatively uniform (laser power, 2250 W; scanning speed, 20 mm/s; spot length, 5 mm). The research in this paper provides a theoretical basis and technological innovation for the processing methods and engineering applications of high-reliability and long-life shield main bearings, which is of great engineering significance. Full article
(This article belongs to the Special Issue Ultrafast Laser Irradiation in Surface Engineering and Tribology)
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13 pages, 7072 KiB  
Article
Effect of Laser Cleaning Parameters on Surface Filth Removal of Porcelain Insulator
by Chunhua Fang, Tao Hu, Ziheng Pu, Peng Li, Tian Wu, Jinbo Jiang, Aoqi Sun and Yao Zhang
Photonics 2023, 10(3), 269; https://doi.org/10.3390/photonics10030269 - 03 Mar 2023
Cited by 4 | Viewed by 1182
Abstract
To study the influence of the laser power, scanning speed, and cleaning water content on the laser cleaning effect and obtain the best cleaning parameters, this paper conducted a simulation analysis of the laser cleaning process and carried out a pulse laser cleaning [...] Read more.
To study the influence of the laser power, scanning speed, and cleaning water content on the laser cleaning effect and obtain the best cleaning parameters, this paper conducted a simulation analysis of the laser cleaning process and carried out a pulse laser cleaning of porcelain insulators experiment to verify. The results show that the cleaning rate gradually increases as the laser power increases from 20 W to 25 W. As the scanning speed increases from 1000 mm/s to 2500 mm/s, the laser overlapping rate gradually decreases, and the cleaning takes the lead in increasing and then decreasing. The appropriate cleaning water content is conducive to laser cleaning; when the water content is 0.115 g, the cleaning efficiency reaches the highest value of 98.20%. When the laser power is 25 W, and the scanning speed is 2000 mm/s, the cleaning efficiency can reach the highest value of 96.87%. This paper shows that the reasonable choice of cleaning parameters can effectively clean the insulator surface filth and obtain a better surface morphology. Full article
(This article belongs to the Special Issue Ultrafast Laser Irradiation in Surface Engineering and Tribology)
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17 pages, 5542 KiB  
Article
Removal Mechanisms and Microstructure Characteristics of Laser Paint Stripping on Aircraft Skin Surface
by Wenqin Li, Xuan Su, Junyi Gu, Yang Jin, Jie Xu and Bin Guo
Photonics 2023, 10(1), 96; https://doi.org/10.3390/photonics10010096 - 16 Jan 2023
Cited by 9 | Viewed by 2243
Abstract
As a non-contact and non-destructive technology, laser cleaning provides an alternative method for the paint stripping of aircraft skins. Herein, the particular multi-layer paint on the aluminum alloy aircraft skin surface was stripped by adjusting laser parameters. Beyond expectation, multi-layer paint led to [...] Read more.
As a non-contact and non-destructive technology, laser cleaning provides an alternative method for the paint stripping of aircraft skins. Herein, the particular multi-layer paint on the aluminum alloy aircraft skin surface was stripped by adjusting laser parameters. Beyond expectation, multi-layer paint led to a highly complex surface as opposed to the ordinary single-layer paint after laser cleaning. The surface morphology, chemical compositions, and surface functional groups of the samples were analyzed, and the successful depaint parameters were found in this experiment with damage free of the aluminum substrate, i.e., laser energy density of 5.09 J/cm2 and scanning speed of 700 mm/s. More importantly, this paper revealed that the mechanisms of laser paint stripping from Al alloy aircraft skin are thermal decomposition, evaporation, and spallation. After laser cleaning, the surface nanoindentation hardness with paint completely stripped and undamaged was increased by 3.587% relative to that of the conventional mechanical lapping sample. The improvement of nanoindentation hardness was also confirmed by the microstructure characterized with electron backscatter diffraction (EBSD) in which plastic deformation led to strain hardening of the substrate surface. This study lays a solid foundation for large-scale, high-efficiency, and low-pollution removal of more complex paint layers on aircraft surfaces in the future. Full article
(This article belongs to the Special Issue Ultrafast Laser Irradiation in Surface Engineering and Tribology)
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Review

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15 pages, 3596 KiB  
Review
Phase Shifting Approaches and Multi-Channel Interferograms Position Registration for Simultaneous Phase-Shifting Interferometry: A Review
by Fuzhong Bai, Jiwei Lang, Xiaojuan Gao, Yang Zhang, Jiahai Cai and Jianxin Wang
Photonics 2023, 10(8), 946; https://doi.org/10.3390/photonics10080946 - 18 Aug 2023
Cited by 2 | Viewed by 952
Abstract
Simultaneous phase-shifting interferometry (SPSI) can simultaneously obtain multiple phase-shifted interferograms and can realize the dynamic wavefront measurement with the use of a phase-shifting algorithm. From the respect of a beam-splitting technique and phase shift achievement of the phase-shifting units, research progress on spatial [...] Read more.
Simultaneous phase-shifting interferometry (SPSI) can simultaneously obtain multiple phase-shifted interferograms and can realize the dynamic wavefront measurement with the use of a phase-shifting algorithm. From the respect of a beam-splitting technique and phase shift achievement of the phase-shifting units, research progress on spatial phase shifting approaches for SPSI systems are classified and summarized, and the key problem affecting SPSI technology is discussed. To ensure the measurement accuracy, it is necessary to perform accurate position registration for multi-channel phase-shifted interferograms before the implementation of a phase-shifting algorithm, and so, the methods of position registration for multi-channel interferograms are also reviewed. This review is expected to prompt research on related fields of phase-shifting interferometry. Full article
(This article belongs to the Special Issue Ultrafast Laser Irradiation in Surface Engineering and Tribology)
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