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Metals
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Advanced Laser Welding Technologies for Metals and Alloys
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Advanced Laser Welding Technologies for Metals and Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Welding and Joining".

Deadline for manuscript submissions: closed (20 May 2024) | Viewed by 2639

Special Issue Editor

Dr. Zhi Luo

E-Mail Website
Guest Editor
State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
Interests: optical design; ultrafast laser; micro-/nano-processing; metamaterials; precision displacement sensing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to extend an invitation for you to contribute to our upcoming Special Issue on 'Advanced Laser Welding Technologies for Metals and Alloys,' which will be published in Metals.

Laser welding technology has rapidly evolved over the years, emerging as a pivotal method for joining metals and alloys in various industries. The precise control of laser energy, minimal heat-affected zones, and superior weld quality make it a compelling choice. As this field continues to grow, it is imperative to consolidate and disseminate the latest research, innovations, and applications in this area. This Special Issue aims to do just that.

Our journal has always been committed to promoting cutting-edge research in materials science and engineering. The topic of 'Advanced Laser Welding Technologies for Metals and Alloys' aligns perfectly with our journal's scope as it addresses a vital aspect of materials science and engineering, highlighting the synergy between technological advancements and material properties. We believe that this Special Issue will enrich our journal's content and further our mission of advancing scientific knowledge.

We invite you to contribute any original research article or review that explores, but is not limited to, the following themes:

  • Laser welding processes and mechanisms;
  • Materials and alloys in laser welding;
  • Process optimization and control techniques;
  • Weld quality assessment and performance;
  • Industrial applications and case studies;
  • Emerging trends and future directions.

We are confident that your expertise and research contributions would greatly enhance the quality and diversity of this Special Issue, and that your valuable insights into this topic would be highly appreciated by our readers and the scientific community.

Thank you for considering our invitation. Your participation would undoubtedly make this Special Issue a resounding success.

Dr. Zhi Luo
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. Metals 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 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 welding
  • metals
  • alloys
  • weld quality
  • process optimization
  • heat-affected zone
  • welding mechanisms
  • microstructure analysis

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

23 pages, 20681 KiB  
Article
Formation of Stainless Steel Welded Joints Produced with the Application of Laser and Plasma Energy Sources
by Vitalii Shevchenko, Volodymyr Korzhyk, Shiyi Gao, Vladyslav Khaskin, Detao Cai, Ziyi Luo, Yevhenii Illiashenko, Viktor Kvasnytskyi and Andrii Perepichay
Metals 2024, 14(6), 706; https://doi.org/10.3390/met14060706 - 14 Jun 2024
Cited by 2 | Viewed by 1133
Abstract
The objective of this study is to investigate the formation of the structure and stress–strain state in the joints of AISI 304 stainless steel with a thickness of 2 mm and produced by welding with laser and plasma energy sources. It is established [...] Read more.
The objective of this study is to investigate the formation of the structure and stress–strain state in the joints of AISI 304 stainless steel with a thickness of 2 mm and produced by welding with laser and plasma energy sources. It is established that the microhardness and parameters of the grain and subgrain structures of the welded joint material differ with respect to the dimensions of crystallites, grains, and subgrains according to the welding process. It is shown that, in terms of structure formation, including substructural features, the most favorable structures of 2 mm AISI 304 welded joints are formed by laser–plasma welding. It is predicted that the residual stressed state is less localized with the application of laser–plasma welding than laser welding, and it is characterized by a lower level of residual stresses compared to plasma welding. In all the cases, the maximal stress values are concentrated in the HAZ, and the value obtained using laser–plasma welding is in an intermediate position (431.7 MPa) between those of the laser (443 MPa) and plasma (413.7 MPa) processes. With laser–plasma and laser welding, displacements (deformations) are minimal and close to 0.2 mm. The method of electron speckle interferometry was used, and the results reveal that the error between the calculated and experimental values of equivalent stresses is no more than 6%, which is acceptable. The results of mechanical testing show that, under uniaxial tension, the strength of the welded joints made of AISI 304 steel using laser–plasma and laser welding is the highest and equal to 97% of that of the base metal. Full article
(This article belongs to the Special Issue Advanced Laser Welding Technologies for Metals and Alloys)
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18 pages, 8773 KiB  
Article
Microstructure, Variant Selection, and Mechanical Properties of Laser-Welded Ti-4Al-2V Joints
by Yonghui Zhu, Lili Lu, Chenlu Zhang, Jun Yuan, Chao Fu and Lu Wang
Metals 2024, 14(4), 405; https://doi.org/10.3390/met14040405 - 29 Mar 2024
Cited by 2 | Viewed by 1180
Abstract
Laser welding of the near α-phase titanium alloy Ti-4Al-2V, used for complex components in the nuclear industry, has been rarely reported. In this study, butt weld joints made of Ti-4Al-2V alloy plates under different parameters, including the laser power, the welding speed, and [...] Read more.
Laser welding of the near α-phase titanium alloy Ti-4Al-2V, used for complex components in the nuclear industry, has been rarely reported. In this study, butt weld joints made of Ti-4Al-2V alloy plates under different parameters, including the laser power, the welding speed, and the defocus distance, were manufactured and analyzed. The results showed that adjusting the combination of 4.2 kW of laser power, a 20 mm/s welding speed, and a −2 mm defocus distance could achieve a penetration depth exceeding 6 mm. Porosity defects were prone to forming in the middle and bottom parts of the fusion zone, due to rapid cooling. The microstructure of the fusion zone was mainly needle-like α martensite, which precipitated in the form of specific clusters. The interior of a cluster was composed of three types of variants with <11−20>/60° phase interfaces to achieve the lower boundary’s energy. Affected by the microstructure and welding defects, the strength of the weld joint was basically similar under different welding conditions, namely about 720 MPa, slightly higher than that of the base metal, while the rupture elongation at breaking decreased by more than 50%. The micro-Vickers hardness of the weld joints was about 50–60 HV higher than that of the base metal, while the impact toughness was about 40 KJ, almost half that of the base metal. This research lays a solid foundation for the engineering application of laser welding of Ti-4Al-2V alloys. Full article
(This article belongs to the Special Issue Advanced Laser Welding Technologies for Metals and Alloys)
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