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Advances in Laser Assisted Processing and Manufacturing
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Advances in Laser Assisted Processing and Manufacturing

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 12535

Special Issue Editor

Prof. Francesco Veniali

E-Mail Website
Guest Editor
Dipartimento di Ingegneria Meccanica e Aerospaziale, Università di Roma “La Sapienza”, Rome, Italy
Interests: machining of composite materials, mass finishing, additive manufacturing, laser machining

Special Issue Information

Dear Colleagues,

Laser has been proven to be an effective tool in various fields of engineering and of science. It can be used in a very delicate way, such as in opthalmic surgery; or with high power, such as in metal cutting; for measurements, such as in surface and in dimensional metrology; and, in control issues. Moreover, several branches of physics make an effective use of this technology. Nevertheless, the application of laser in combination with other technologies is still relatively limited in both parallel and in serial usage. With this Special Issue, we intend to foster basic and applied research in the field of cooperative technologies of whatsoever type, one of them being always the laser. We sincerely believe that the almost endless combination of technologies which can be coupled with lasers might have important spill-over effects on basic and applied research. We foresee several contributions from the engineering, medicine, biology, and physics fields, but other fields of research will also be welcome. All kinds of papers will be considered for publication, spanning from theoretical approaches, to numerical simulation, to applications in real cases, with special emphasis to processing and manufacturing of new materials and components as well as the development of special devices based on the combined use of laser and physical/chemical/other agents.

It is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Francesco Veniali
Guest Editor

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. Materials is an international peer-reviewed open access semimonthly 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 2600 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 cooperative technologies
  • manufacturing
  • materials interaction
  • metrology
  • medicine applications
  • bioengineering applications
  • systems engineering

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Published Papers (4 papers)

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Research

8 pages, 1058 KiB  
Article
Rapid Fabrication of Smooth Micro-Optical Components on Glass by Etching-Assisted Femtosecond Laser Modification
by Bao-Xu Wang, Jin-Yong Qi, Yi-Ming Lu, Jia-Xin Zheng, Ying Xu and Xue-Qing Liu
Materials 2022, 15(2), 678; https://doi.org/10.3390/ma15020678 - 17 Jan 2022
Cited by 14 | Viewed by 3105
Abstract
Femtosecond laser (fs-laser) is unfavorable in applications for the fabrication of micro-optical devices on hard materials owing to the problems of low fabrication efficiency and high surface roughness. Herein, a hybrid method combining fs-laser scanning, subsequent etching, and annealing was proposed to realize [...] Read more.
Femtosecond laser (fs-laser) is unfavorable in applications for the fabrication of micro-optical devices on hard materials owing to the problems of low fabrication efficiency and high surface roughness. Herein, a hybrid method combining fs-laser scanning, subsequent etching, and annealing was proposed to realize micro-optical devices with low roughness on glass. Compared to traditional laser ablation, the fabrication efficiency in this work was improved by one order of magnitude, and the surface roughness was decreased to 15 nm. Using this method, aspherical convex microlenses and spherical concave microlenses that possess excellent focusing and imaging properties are realized on photosensitive glass. The diameter and height of the microlenses were controlled by adjusting the fabrication parameters. These results indicate that the fs-laser-based hybrid method will open new opportunities for fabricating micro-optical components on hard materials. Full article
(This article belongs to the Special Issue Advances in Laser Assisted Processing and Manufacturing)
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14 pages, 3244 KiB  
Article
Fabrication of Anti-Reflective Surface with Superhydrophobicity/High Oleophobicity and Enhanced Mechanical Durability via Nanosecond Laser Surface Texturing
by Huixin Wang, Jian Zhuang, Jiangtao Yu, Hongyan Qi, Yunhai Ma, Hubiao Wang and Zhijun Guo
Materials 2020, 13(24), 5691; https://doi.org/10.3390/ma13245691 - 13 Dec 2020
Cited by 9 | Viewed by 2540
Abstract
In this work, anti-reflective surface with superhydrophobicity/oleophobicity and enhanced abrasion resistance was fabricated on steel alloy surface. Two different surface patterns (i.e., parallel microgrooves and spot arrays) were created by nanosecond laser ablation and chemical immersion. The surface micro/nanostructure, spectral reflectance, wettability, and [...] Read more.
In this work, anti-reflective surface with superhydrophobicity/oleophobicity and enhanced abrasion resistance was fabricated on steel alloy surface. Two different surface patterns (i.e., parallel microgrooves and spot arrays) were created by nanosecond laser ablation and chemical immersion. The surface micro/nanostructure, spectral reflectance, wettability, and abrasion resistance of all the samples were determined. The experimental results showed that the laser-chemical treated surfaces exhibited much lower spectral reflectance and significantly enhanced surface integrities compared with the untreated surface. Firstly, the contact angles of water, glycerol, and engine oil on the laser-chemical treated surfaces were increased up to 158.9°, 157.2°, and 130.0° respectively, meaning the laser-chemical treated surfaces achieved both superhydrophobicity and high oleophobicity. Secondly, the laser-chemical treated surface showed enhanced abrasion resistance. The experimental results indicated that the spectral reflectance of the laser-chemical treated surfaces remained almost unchanged, while the laser-chemical treated surface patterned with parallel microgrooves sustained superhydrophobicity with a water contact angle of 150.2° even after more than one hundred abrasion cycles, demonstrating the superior mechanical durability. Overall, this fabrication method has shown its effectiveness for fabrication of multifunctional metal surface integrating the surface functionalities of anti-reflectivity, superhydrophobicity/high oleophobicity, and enhanced abrasion resistance. Full article
(This article belongs to the Special Issue Advances in Laser Assisted Processing and Manufacturing)
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Graphical abstract

13 pages, 46242 KiB  
Article
Impact on Mechanical Properties and Microstructural Response of Nickel-Based Superalloy GH4169 Subjected to Warm Laser Shock Peening
by Ying Lu, Yuling Yang, Jibin Zhao, Yuqi Yang, Hongchao Qiao, Xianliang Hu, Jiajun Wu and Boyu Sun
Materials 2020, 13(22), 5172; https://doi.org/10.3390/ma13225172 - 16 Nov 2020
Cited by 12 | Viewed by 2474
Abstract
Laser shock peening (LSP), as an innovative surface treatment technology, can effectively improve fatigue life, surface hardness, corrosion resistance, and residual compressive stress. Compared with laser shock peening, warm laser shock peening (WLSP) is a newer surface treatment technology used to improve materials’ [...] Read more.
Laser shock peening (LSP), as an innovative surface treatment technology, can effectively improve fatigue life, surface hardness, corrosion resistance, and residual compressive stress. Compared with laser shock peening, warm laser shock peening (WLSP) is a newer surface treatment technology used to improve materials’ surface performances, which takes advantage of thermal mechanical effects on stress strengthening and microstructure strengthening, resulting in a more stable distribution of residual compressive stress under the heating and cyclic loading process. In this paper, the microstructure of the GH4169 nickel superalloy processed by WLSP technology with different laser parameters was investigated. The proliferation and tangling of dislocations in GH4169 were observed, and the dislocation density increased after WLSP treatment. The influences of different treatments by LSP and WLSP on the microhardness distribution of the surface and along the cross-sectional depth were investigated. The microstructure evolution of the GH4169 alloy being shocked with WLSP was studied by TEM. The effect of temperature on the stability of the high-temperature microstructure and properties of the GH4169 alloy shocked by WLSP was investigated. Full article
(This article belongs to the Special Issue Advances in Laser Assisted Processing and Manufacturing)
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11 pages, 2295 KiB  
Article
Fabrication of Chalcogenide Glass Based Hexagonal Gapless Microlens Arrays via Combining Femtosecond Laser Assist Chemical Etching and Precision Glass Molding Processes
by Fan Zhang, Qing Yang, Hao Bian, Minjing Li, Xun Hou and Feng Chen
Materials 2020, 13(16), 3490; https://doi.org/10.3390/ma13163490 - 7 Aug 2020
Cited by 17 | Viewed by 3557
Abstract
Chalcogenide glasses (ChGs) are emerging as critical infrared (IR)-enabled materials in advanced IR optical systems by the wealth of their transparency in the key wide infrared (IR) transmission window. However, fabrication of ChG-based integrated micro-optical components in an efficient and economical way remains [...] Read more.
Chalcogenide glasses (ChGs) are emerging as critical infrared (IR)-enabled materials in advanced IR optical systems by the wealth of their transparency in the key wide infrared (IR) transmission window. However, fabrication of ChG-based integrated micro-optical components in an efficient and economical way remains a huge challenge. In this paper, a 3D close-packed hexagonal microlens array (MLA) possessing over 6000 convex hexagonal micro-lenslets with the size of tens of micrometers within a footprint of 10 mm × 10 mm on a Ge20Sb15Se65 ChG surface was successfully fabricated via a precise thermal-mechanical molding process. The master mold of ChG MLA was firstly fabricated by a femtosecond laser-assisted chemical etching process and then transferred on to the surface of the ChG via a precision thermo-mechanical molding process, which resulted in a convex MLA. The morphology, imaging and focusing performances of the as-prepared ChG MLA were investigated and demonstrated the advancement of the method. Meanwhile, the IR transmittance and x-ray diffraction image of the ChG MLAs were measured to verify the structural and compositional stability of the ChG under the given molding conditions. The combined results proved a new route to mass production of miniaturized gapless ChG MLAs for advanced infrared micro-optics. Full article
(This article belongs to the Special Issue Advances in Laser Assisted Processing and Manufacturing)
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