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Laser-Assisted Processing of Alloys and Metal Surface Layers

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (20 September 2022) | Viewed by 5590

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Special Issue Editor

Dr. Sławomir Kąc

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Guest Editor

Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Mickiewicza 30, PL-30059 Krakow, Poland
Interests: surface engineering; thin films; pulsed laser deposition; laser surface treatment; wear resistance
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Despite the fact that laser surface treatment of materials has been known for many years and is increasingly being used in industry, scientific research is still being carried out on the interaction of the laser beam with metals and their alloys.

Laser Surface Texturing (LST) is one of the most efficient surface modification approaches for improving the tribological properties of engineering materials. The LST process can be performed by means of direct laser ablation, laser interference, and laser shock processing.

One of the most commonly used laser treatments is laser ablation. The laser ablation process is used to produce thin films in the Pulsed Laser Deposition (PLD) method. This technique allows the deposition of thin films on various substrates (metals, ceramics, polymers). Moreover, the laser ablation process carried out in various gas or liquid environments has a positive effect on the corrosion resistance of ablated metals. The latest literature reports show that the laser ablation process, by modifying the surface, also allows one to significantly increase the hydrophobicity of metal surfaces.

Subjects of this Special Issue titled “Laser-Assisted Processing of Alloys and Metal Surface Layers” will concern innovative processes of laser surface treatment of metals and alloys.

Prof. Dr. Sławomir Kąc
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

Pulsed laser deposition
Laser surface texturing
Thin films
Laser ablation
Laser beam interference
Laser shock processing
Laser peening
Laser surface heat treatment
Surface hydrophobicity

Published Papers (3 papers)

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Research

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17 pages, 4157 KiB

Open AccessArticle

Optimization of Selective Laser Melting Parameter for Invar Material by Using JAYA Algorithm: Comparison with TLBO, GA and JAYA

by Hiren Gajera, Faramarz Djavanroodi, Soni Kumari, Kumar Abhishek, Din Bandhu, Kuldeep K. Saxena, Mahmoud Ebrahimi, Chander Prakash and Dharam Buddhi

Materials 2022, 15(22), 8092; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15228092 - 15 Nov 2022

Cited by 12 | Viewed by 1013

Abstract

In this study, the hardness and surface roughness of selective laser-melted parts have been evaluated by considering a wide variety of input parameters. The Invar-36 has been considered a workpiece material that is mainly used in the aerospace industry for making parts as well as widely used in bimetallic thermostats. It is the mechanical properties and metallurgical properties of parts that drive the final product’s quality in today’s competitive marketplace. The study aims to examine how laser power, scanning speed, and orientation influence fabricated specimens. Using ANOVA, the established models were tested and the parameters were evaluated for their significance in predicting response. In the next step, the fuzzy-based JAYA algorithm has been implemented to determine which parameter is optimal in the proposed study. In addition, the optimal parametric combination obtained by the JAYA algorithm was compared with the optimal parametric combination obtained by TLBO and genetic algorithm (GA) to establish the effectiveness of the JAYA algorithm. Based on the results, an orientation of 90°, 136 KW of laser power, and 650 mm/s scanning speed were found to be the best combination of process parameters for generating the desired hardness and roughness for the Invar-36 material. Full article

(This article belongs to the Special Issue Laser-Assisted Processing of Alloys and Metal Surface Layers)

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14 pages, 47725 KiB

Open AccessArticle

Microstructure and Soil Wear Resistance of a Grey Cast Iron Alloy Reinforced with Ni and Cr Laser Coatings

by Marta Paczkowska and Jaroslaw Selech

Materials 2022, 15(9), 3153; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15093153 - 27 Apr 2022

Cited by 4 | Viewed by 1377

Abstract

The goal of the presented investigation was to assess the impact of surface laser modification with the implementation of nickel and chromium on the microstructure and tribological behaviour of grey iron. Surface laser modification consisted of remelting the surface layer with simultaneous implementation of selected elements. In the first variant of treatment only nickel was implemented and in the second one, a combination of nickel with chromium together. This treatment was performed on an agriculture machine part made of grey iron and working in intensive friction conditions. The constituted surface layer was characterized by about 0.45 mm of depth and a 160 mm² area of the most exposed to wear of the treated part. In the case of both types of variants, the achieved surface layer microstructure was identified as homogenized with small grains. It involved nickel in the first variant of modification and nickel and chromium in the second one. The attained microstructure with nickel addition was characterized by nearly 800 HV0.1 of hardness (a 3.6-fold increase in comparison to its core material). The approximate hardness of 900 HV0.1 was achieved in the case of the microstructure enriched with nickel and chromium (over a 4-fold increase in comparison to the core material). The roughness of the surface after laser modification was reduced (nearly 3-fold) in comparison to the original surface of the part that was characterized by quite substantial coarseness. The wear test showed that Ni and Cr laser coatings increased resistance to abrasive wear resulting from the modification of the microstructure by the formation of martensite and grain fragmentation. Laser modified parts had a 2.5-fold smaller mass loss than untreated parts. Both types of performed variants: with the implementation of nickel and a combination of nickel and chromium gave comparable effects. Full article

(This article belongs to the Special Issue Laser-Assisted Processing of Alloys and Metal Surface Layers)

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Review

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37 pages, 8344 KiB

Open AccessReview

Review of Techniques for Improvement of Softening Behavior of Age-Hardening Aluminum Alloy Welded Joints

by Jiwen Cheng, Gang Song, Xiaosheng Zhang, Chunbai Liu and Liming Liu

Materials 2021, 14(19), 5804; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14195804 - 04 Oct 2021

Cited by 11 | Viewed by 2590

Abstract

The softening phenomenon of age-hardening aluminum alloy-welded joints is severe during conventional fusion welding, which increases the likelihood of stress and strain concentration in the joint during the period of service, significantly reduces the mechanical properties compared to the base metal, and represents an obstacle to the exploration of the potential structural performance. This review paper focuses on an overview of the softening phenomenon. Firstly, the welding softening mechanism and the characteristics of age-hardening aluminum alloys are clarified. Secondly, the current main research methods that can effectively improve joint softening are summarized into three categories: low-heat-input welding, externally assisted cooling during welding, and post-weld treatment. The strengthening mechanism and performance change rule of age-hardening aluminum alloy joints are systematically analyzed. Finally, this paper considers the future development trends of further research on joint softening, and it is expected that interest in this topic will increase. Full article

(This article belongs to the Special Issue Laser-Assisted Processing of Alloys and Metal Surface Layers)

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