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Applied Sciences
Special Issues
Applied Laser Processing, Manufacturing, and Materials Science
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Applied Laser Processing, Manufacturing, and Materials Science

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: 20 July 2024 | Viewed by 3413

Special Issue Editor

Dr. Nikolaos G. Semaltianos

E-Mail Website
Guest Editor
Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: atomic and molecular optical spectroscopy; laser materials microprocessing; laser ablation; laser-induced plasma plume; nanocomposites; nanomagnetism; semiconductor optoelectronics; thin films technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In addition to the use of lasers in metrology, their ability to deliver a monochromatic, directional, coherent, and bright photon beam is a unique advantage that enables their use as tools in the field of materials processing and manufacturing. The interaction of a laser beam that has certain beam characteristics with a material is mainly determined by the type of material, defined by its optical, chemical, electrical, atomic, mechanical, manufacturing, and thermal properties, such as absorbance, reflectivity, surface energy, dielectric constant, hardness, surface roughness, strength, machinability rating, heat of vaporization, melting point, thermal conductivity, and thermal diffusivity. For instance, the relation of the pulse width of a laser beam with the electron–phonon coupling time-constant of a material is a critical factor that determines whether the material is laser ablated via melting/vaporization or sublimation. The laser ablation threshold of a thin film depends on its thickness, due mainly to the reduction in the length of the heat diffusion along the film thickness as compared to its surface. The absorption of a laser beam by a semiconducting material depends on its energy band gap. The period of the laser-induced periodic surface structures that are formed on the surface of a metal by laser irradiation depends on the relative permittivity of the material. The surface topography of glass plays a major role in the diffraction of the laser beam during ablation cutting, which in turn determines the damage formation. The electron–electron collision time and recombination coefficient critically determine the ablation depth and width during laser ablation of transparent dielectrics.
Applied Sciences invites papers for a Special Issue entitled “Applied Laser Processing, Manufacturing, and Materials Science”. This Special Issue is focused on works that emphasize and provide insights of the “processing–structure–property relationships” of materials in laser processing and manufacturing. Experimental and theoretical articles will be accepted regarding laser machining of materials, modeling of the laser beam–material interaction, interfacing laser processing and manufacturing with material characterization techniques, comparison of the properties of a material processed using lasers with those processed using other techniques, material performance of laser-processed materials, and laser processing of new and advanced materials.

Topics of interest include, but are not limited to, the following: laser surface texturing, cutting, drilling, peening, welding, brazing, or cleaning; laser additive manufacturing; laser micro/nanofabrication; numerical modeling of laser–matter interaction; traditional materials (metals, semiconductors, ceramics, polymers); biological materials; new and advanced materials, such as nanomaterials; industrial production systems of laser-based processing and manufacturing; laser processing and manufacturing combined with material characterization techniques.

Dr. Nikolaos G. Semaltianos
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. Applied Sciences 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 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 materials processing
  • laser manufacturing
  • materials
  • materials characterization
  • numerical modeling
  • industrial systems

Published Papers (3 papers)

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Research

13 pages, 11362 KiB  
Article
High-Quality Cutting of Soda–Lime Glass with Bessel Beam Picosecond Laser: Optimization of Processing Point Spacing, Incident Power, and Burst Mode
by Jiaxuan Liu, Jianjun Yang, Hui Chen, Jinxuan Li, Decheng Zhang, Jian Zhong and Xinjian Pan
Appl. Sci. 2024, 14(5), 1885; https://doi.org/10.3390/app14051885 - 25 Feb 2024
Viewed by 415
Abstract
Soda–lime glass has a wide range of applications in the fields of smart electronics, optical components, and precision originals. In order to investigate the effect of processing parameters on picosecond Bessel laser cutting of soda–lime glass and to achieve high-quality soda–lime glass cutting, [...] Read more.
Soda–lime glass has a wide range of applications in the fields of smart electronics, optical components, and precision originals. In order to investigate the effect of processing parameters on picosecond Bessel laser cutting of soda–lime glass and to achieve high-quality soda–lime glass cutting, a series of cutting experiments were conducted in this study. In this study, it was found that the machining point spacing, the incident laser energy, and the number of burst modes had a significant effect on the machining of the samples. The atomic force microscope (AFM) showed a better quality of roughness of the machined cross-section when the spacing of the machining points was 1 μm, a locally optimal solution was obtained when the number of burst modes was 2, and a locally optimal solution was also obtained when the incident laser power was 11.5 W. In this study, better machining quality was achieved for soda–lime glass of 1 mm thickness, with an average roughness of 158 nm and a local optimum of 141 nm. Full article
(This article belongs to the Special Issue Applied Laser Processing, Manufacturing, and Materials Science)
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14 pages, 2984 KiB  
Article
Femtosecond Laser Ablation of a Bulk Graphite Target in Water for Polyyne and Nanomaterial Synthesis
by Nikolaos G. Semaltianos, Ona Balachninaitė, Remigijus Juškėnas, Audrius Drabavicius, Gediminas Niaura and Euan Hendry
Appl. Sci. 2023, 13(18), 10388; https://doi.org/10.3390/app131810388 - 17 Sep 2023
Viewed by 1144
Abstract
Laser ablation of a bulk graphite target in water using femtosecond laser pulses (pulse width ≤ 190 fs) was performed to investigate the synthesis of polyynes and carbon-based nanomaterials and compare them with the well-studied cases of longer pulse (picosecond or nanosecond) ablations. [...] Read more.
Laser ablation of a bulk graphite target in water using femtosecond laser pulses (pulse width ≤ 190 fs) was performed to investigate the synthesis of polyynes and carbon-based nanomaterials and compare them with the well-studied cases of longer pulse (picosecond or nanosecond) ablations. The laser ablation products were characterized using UV-vis absorption spectroscopy, Raman spectroscopy, X-ray diffraction, and transmission electron microscopy, whereas the induced plasma plumes were characterized using laser-induced breakdown spectroscopy. Carbon-based nanomaterials and short-chain polyynes (C6H2 and C8H2) are formed in the solutions as proven by their characteristic absorption band at ~262 nm and peaks in the region of 190–240 nm as well as at around 2100 cm−1 in the Raman spectra, respectively. Polyynes (C8H2) are present in the solutions that are produced under an ablation that is carried out in two intervals with a short pause between them, which is contrary to a continuous ablation that is performed for the same total time duration. The ablation products have a hexagonal graphite crystal structure. The carbon-based nanomaterials consist of large non-spherical and small spherical nanoparticles as well as sheet-like structures. The results of the study were compared with previous studies and discussed based on those studies. Full article
(This article belongs to the Special Issue Applied Laser Processing, Manufacturing, and Materials Science)
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13 pages, 2792 KiB  
Article
Surface Forming Criteria of Ti-6AL-4V Titanium Alloy under Laser Loading
by Fei Yin, Xia Ye, Hongbing Yao, Pengyu Wei, Xumei Wang, Jiawei Cong and Yanqun Tong
Appl. Sci. 2021, 11(12), 5406; https://doi.org/10.3390/app11125406 - 10 Jun 2021
Cited by 2 | Viewed by 1407
Abstract
In order to study the spallation phenomenon of titanium alloy under the shock of nanosecond laser, the Neodymium-Yttrium-Aluminum Garnet laser was used to carry out laser shock experiments on the surface of titanium alloy. By observing and measuring the surface morphology of the [...] Read more.
In order to study the spallation phenomenon of titanium alloy under the shock of nanosecond laser, the Neodymium-Yttrium-Aluminum Garnet laser was used to carry out laser shock experiments on the surface of titanium alloy. By observing and measuring the surface morphology of the target material, the forming factors and the changes of the surface morphology under different parameter settings, the forming criteria of the titanium alloy were obtained. The results show that under the single variable method, the change of laser energy can affect the target shape variable, and there is a positive correlation between them. When the thickness was greater than or equal to 0.08 mm, no obvious cracks were found in the targets. Moreover, the number of impact times was the key factor for the target deformation; with the growth of impact times, the target deformation gradually became larger until the crack appeared. The larger the diameter of the spot, the more likely the target was to undergo plastic deformation. The surface of titanium alloy with a thickness of 0.08 mm appeared to rebound under specific laser shock condition. The changes in the back of the target material were observed in real time through a high-speed camera, and the plasma induced by the laser was observed in the process. This study is based on the results of previous studies to obtain the titanium alloy forming criteria, which provides a basis for the setting of laser parameters and the thickness of the target when the nanosecond laser impacts the Ti-6AL-4V target. Full article
(This article belongs to the Special Issue Applied Laser Processing, Manufacturing, and Materials Science)
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