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Advanced Additive Manufacturing and Application
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Advanced Additive Manufacturing and Application

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

Deadline for manuscript submissions: 10 November 2024 | Viewed by 2463

Special Issue Editor

Dr. Reza Teimouri

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering, Cracow University of Technology, 31-864 Kraków, Poland
Interests: additive manufacturing; machining and cutting tool; surface integrity; fatigue
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

By definition, additive manufacturing (AM) is a technology that constructs 3D complex geometries by adding layer-upon-layer of material based on the digital computer-aided design model. The nature of this construction has brought several advantages for this production method compared to conventional subtractive manufacturing (CSM). The ability to produce complex structures, tailoring the properties, as well as sustainability and ecological issues such as less energy consumption and material waste are taken into account as benefits of AM compared to CSM. However, the nature of this production has its own drawbacks like the formation of rough surfaces and porosities in the surface and beneath layers, which is detrimental for lifetime of AM components. On the other hand, as a result of the complicated physical phenomena taking place during fusion and deposition, the AM material exhibits inadvertent anomalies and lacks certifiable structural integrity and/or sufficient quality for engineering applications. Therefore, prior to extending the range of applications of such promising technology and being replaced by conventional CSM, certification regarding mechanical and tribological properties, surface integrity and fatigue strength is required. 

This Special Issue welcomes articles addressing surface integrity, fatigue life, corrosion and wear resistance of AM material by optimizing the process window or by applying a post-processing plan. The articles should outline the structural integrity of metallic materials (as well as other types of material) which are produced using different variants of AM technologies. 

Dr. Reza Teimouri
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

  • additive manufacturing
  • post processing
  • surface integrity
  • fatigue
  • wear
  • corrosion

Published Papers (3 papers)

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Research

23 pages, 5600 KiB  
Article
Effects of Atmospheric Pressure Plasma Jet on 3D-Printed Acrylonitrile Butadiene Styrene (ABS)
by Andrei Vasile Nastuta, Mihai Asandulesa, Iuliana Spiridon, Cristian-Dragos Varganici, Ramona Huzum and Ilarion Mihaila
Materials 2024, 17(8), 1848; https://doi.org/10.3390/ma17081848 - 17 Apr 2024
Viewed by 389
Abstract
Polymers are essential in several sectors, yet some applications necessitate surface modification. One practical and eco-friendly option is non-thermal plasma exposure. The present research endeavors to examine the impacts of dielectric barrier discharge atmospheric pressure plasma on the chemical composition and wettability properties [...] Read more.
Polymers are essential in several sectors, yet some applications necessitate surface modification. One practical and eco-friendly option is non-thermal plasma exposure. The present research endeavors to examine the impacts of dielectric barrier discharge atmospheric pressure plasma on the chemical composition and wettability properties of acrylonitrile butadiene styrene surfaces subject to the action of additive manufacturing. The plasma source was produced by igniting either helium or argon and then adjusted to maximize the operational conditions for exposing polymers. The drop in contact angle and the improvement in wettability after plasma exposure can be due to the increased oxygen-containing groups onto the surface, together with a reduction in carbon content. The research findings indicated that plasma treatment significantly improved the wettability of the polymer surface, with an increase of up to 60% for both working gases, while the polar index increased from 0.01 up to 0.99 after plasma treatment. XPS measurements showed an increase of up to 10% in oxygen groups at the surface of He–plasma-treated samples and up to 13% after Ar–plasma treatment. Significant modifications were observed in the structure that led to a reduction of its roughness by 50% and also caused a leveling effect after plasma treatment. A slight decrease in the glass and melting temperature after plasma treatment was pointed out by differential scanning calorimetry and broadband dielectric spectroscopy. Up to a 15% crystallinity index was determined after plasma treatment, and the 3D printing process was measured through X-ray diffraction. The empirical findings encourage the implementation of atmospheric pressure plasma-based techniques for the environmentally sustainable manipulation of polymers for applications necessitating higher levels of adhesion and specific prerequisites. Full article
(This article belongs to the Special Issue Advanced Additive Manufacturing and Application)
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12 pages, 22124 KiB  
Article
Effect of Magnetic Field on Maskless Localized Electrodepositing Three-Dimensional Microstructure of Nano Nickel Crystals
by Menghua Wu, Bingchun Jiang, Yuqing Xiao and Weiping Jia
Materials 2024, 17(2), 386; https://doi.org/10.3390/ma17020386 - 12 Jan 2024
Viewed by 590
Abstract
In the intricate process of maskless localized electrodeposition (MLED) for fabricating three-dimensional microstructures, specifically nickel micro-columns with an aspect ratio of 7:1, magnetic fields of defined strength were employed, oriented both parallel and anti-parallel to the electric field. The aim was to achieve [...] Read more.
In the intricate process of maskless localized electrodeposition (MLED) for fabricating three-dimensional microstructures, specifically nickel micro-columns with an aspect ratio of 7:1, magnetic fields of defined strength were employed, oriented both parallel and anti-parallel to the electric field. The aim was to achieve nanocrystalline microstructures and elevated deposition rates. A detailed comparative analysis was conducted to examine the volumetric deposition rate, surface morphology, and grain size of the MLED nickel crystal 3D microstructures, both in the absence and presence of the two magnetic field directions, facilitated by a self-assembled experimental setup. The results indicate that the anti-parallel magnetic field significantly boosts the volumetric deposition rate to a notable 19,050.65 μm3/s and refines the grain size, achieving an average size of 24.82 nm. Conversely, the parallel magnetic field is found to enhance the surface morphology of the MLED nickel crystal 3D microstructure. Full article
(This article belongs to the Special Issue Advanced Additive Manufacturing and Application)
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16 pages, 2303 KiB  
Article
Multiscale Modeling of a Chain Comprising Selective Laser Melting and Post-Machining toward Nanoscale Surface Finish
by Reza Teimouri
Materials 2023, 16(24), 7535; https://doi.org/10.3390/ma16247535 - 06 Dec 2023
Cited by 2 | Viewed by 871
Abstract
The generation of rough surfaces is an inherent drawback of selective laser melted (SLM) material that makes post-treatment operation a mandatory process to enhance its surface condition and service performance. However, planning an appropriate and optimized chain to attain the best surface finish [...] Read more.
The generation of rough surfaces is an inherent drawback of selective laser melted (SLM) material that makes post-treatment operation a mandatory process to enhance its surface condition and service performance. However, planning an appropriate and optimized chain to attain the best surface finish needs an integrated simulation framework that includes physics of both additive manufacturing and post-processing. In the present work, an attempt is made to model the alternation of surface roughness which is produced by SLM and post-processed by milling and sequential surface burnishing. The framework includes a series of closed-form analytical solutions of all three processes embedded in a sequence where the output of the preceding operation is input of the sequential one. The results indicated that there is close agreement between the measured and predicted values of arithmetic surface roughness for both SLM material and the post-processed ones. It was also found that a nanoscale surface finish is obtained by finishing milling and single pass rolling at a static force of 1500 N. In addition, the results of the simulation showed that elimination of the milling process in the chain resulted in a six-times-longer production time that requires three times bigger rolling force compared to a chain with an included milling operation. Full article
(This article belongs to the Special Issue Advanced Additive Manufacturing and Application)
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