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Laser Machining Technology in Materials Science
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Laser Machining Technology in Materials Science

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

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 4974

Special Issue Editor

Dr. Zaneta Swiatkowska-Warkocka

E-Mail Website
Guest Editor
Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland
Interests: nanomaterials; nanocomposites; nanoalloys; particles; laser synthesis; magnetic properties

Special Issue Information

Dear Colleagues,

Laser machining is a highly flexible, widespread, non-contact process used in industry and science. Laser processing is used extensively, from mass processing to micromachining and microstructuring in the semiconductor, electronics, automotive, aerospace, and biomedical applications. A wide range of laser sources with various combinations of wavelength, pulse duration, energy, and pulse frequency offer a wide range of research and production opportunities in many fields, especially in materials science, in the discovery and design of new or advanced materials.

This Special Issue includes, but is not limited to, new and advanced materials using laser machining/fabrication techniques, laser micro/nano-production, theoretical modeling of the interaction of laser light with matter, simulations giving insight, and understanding of processes taking place during laser processing.

Dr. Zaneta Swiatkowska-Warkocka
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 machining
  • laser technology
  • advanced materials
  • laser micro/nanoproduction
  • laser light–matter interactions
  • numerical and mathematical modeling

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Published Papers (2 papers)

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Research

15 pages, 6804 KiB  
Article
Laser Direct Joining of Steel to Polymethylmethacrylate: The Influence of Process Parameters and Surface Mechanical Pre-Treatment on the Joint Strength and Quality
by Fábio A. O. Fernandes, José P. Pinto, Bruno Vilarinho and António B. Pereira
Materials 2022, 15(14), 5081; https://doi.org/10.3390/ma15145081 - 21 Jul 2022
Cited by 4 | Viewed by 1870
Abstract
The search for lightweight structures increases the demand for non-metallic materials, such as polymers, composites, and hybrid structures. This work presents the dissimilar joining through direct laser joining between polymethylmethacrylate (PMMA) and S235 galvanised steel using a pulsed Nd:YAG laser. The main goal [...] Read more.
The search for lightweight structures increases the demand for non-metallic materials, such as polymers, composites, and hybrid structures. This work presents the dissimilar joining through direct laser joining between polymethylmethacrylate (PMMA) and S235 galvanised steel using a pulsed Nd:YAG laser. The main goal is to determine the influence of processing parameters on joint strength and quality. In addition, the impact of surface conditions on the joint quality was also analysed. Overall, the optimum ranges of process parameters were found, and some are worth highlighting, such as the laser beam diameter and pulse duration, which significantly influenced the joint strength. Failure of the welded samples occurred in PMMA component, demonstrating good joint efficiency. Additionally, a maximum increase of 5.1% of the tensile shear strength was achieved thanks to the mechanical pre-treatment. It is possible to conclude that the joining between PMMA and the S235 galvanised steel can be performed by optimising the process parameters. Additionally, it can be enhanced through surface pre-treatments by exploring the mechanical interlock between both materials. Full article
(This article belongs to the Special Issue Laser Machining Technology in Materials Science)
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13 pages, 2339 KiB  
Article
Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond
by Annette Setzer, Pablo D. Esquinazi, Sergei Buga, Milena T. Georgieva, Tilo Reinert, Tom Venus, Irina Estrela-Lopis, Andrei Ivashenko, Maria Bondarenko, Winfried Böhlmann and Jan Meijer
Materials 2022, 15(3), 1014; https://doi.org/10.3390/ma15031014 - 28 Jan 2022
Cited by 5 | Viewed by 2515
Abstract
In this work, we demonstrate that cutting diamond crystals with a laser (532 nm wavelength, 0.5 mJ energy, 200 ns pulse duration at 15 kHz) produced a ≲20 nm thick surface layer with magnetic order at room temperature. We measured the magnetic moment [...] Read more.
In this work, we demonstrate that cutting diamond crystals with a laser (532 nm wavelength, 0.5 mJ energy, 200 ns pulse duration at 15 kHz) produced a ≲20 nm thick surface layer with magnetic order at room temperature. We measured the magnetic moment of five natural and six CVD diamond crystals of different sizes, nitrogen contents and surface orientations with a SQUID magnetometer. A robust ferromagnetic response at 300 K was observed only for crystals that were cut with the laser along the (100) surface orientation. The magnetic signals were much weaker for the (110) and negligible for the (111) orientations. We attribute the magnetic order to the disordered graphite layer produced by the laser at the diamond surface. The ferromagnetic signal vanished after chemical etching or after moderate temperature annealing. The obtained results indicate that laser treatment of diamond may pave the way to create ferromagnetic spots at its surface. Full article
(This article belongs to the Special Issue Laser Machining Technology in Materials Science)
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