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Innovative Technologies and Materials for High-Performance Components – Volume II

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

Deadline for manuscript submissions: closed (10 January 2024) | Viewed by 6769

Special Issue Editors

Dipartimento di Ingegneria dell’Impresa “Mario Lucertini”, Università degli Studi di Roma "Tor Vergata", via del Politecnico, 1, 00133 Roma, Italy
Interests: unconventional machining processes; electrodeposition technologies of innovative materials; simulation of manufacturing processes; characterization of composite material components; surface finishing of additive manufactured components
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Guest Editor
Faculty Engineering Sciences, Hochschule Mittweida - University of Applied Sciences, 09648 Mittweida, Germany
Interests: manufacturing materials; manufacturing technologies; machining; laser machining; 3D printing; DOE
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The need to obtain components with excellent properties in many industrial fields is a critical issue. Papers related to the advancement of the in-depth understanding of the relationship between manufacturing processes and the resulting properties of components are welcome.

The scope of the present Special Issue includes, but is not limited, to: research related to innovative technologies, manufacturing processes and materials for high-performance components.

Contributions may be related to conventional or unconventional processes, highlighting novelty aspects of processing, manufacturing, coating technology and materials able to obtain high-performance components. In addition, computation methods (such as mathematical modeling, simulation, machine learning, optimization and control) for the estimation of the resulting material properties can also be treated. Articles are also welcome on sustainability and reducing environmental impact.

Dr. Silvio Genna
Dr. Flaviana Tagliaferri
Guest Editors

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

  • joining techniques
  • additive manufacturing
  • non-conventional processing
  • advanced manufacturing
  • material characterization
  • simulation and modeling

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Published Papers (4 papers)

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Research

21 pages, 10676 KiB  
Article
Development of a Polyethylene Glycol/Polymethyl Methacrylate-Based Binder System for a Borosilicate Glass Filler Suitable for Injection Molding
by Martin Zürn, Annika Schrage, Steffen Antusch, Nicole Bohn, Peter Holzer and Thomas Hanemann
Materials 2024, 17(6), 1396; https://doi.org/10.3390/ma17061396 - 19 Mar 2024
Cited by 2 | Viewed by 2185
Abstract
Powder injection molding is an established, cost effective and often near-net-shape mass production process for metal or ceramic parts with complex geometries. This paper deals with the extension of the powder injection molding process chain towards the usage of a commercially available borosilicate [...] Read more.
Powder injection molding is an established, cost effective and often near-net-shape mass production process for metal or ceramic parts with complex geometries. This paper deals with the extension of the powder injection molding process chain towards the usage of a commercially available borosilicate glass and the realization of glass compounds with huge densities. The whole process chain consists of the individual steps of compounding, molding, debinding, and sintering. The first part, namely, the search for a suitable feedstock composition with a very high solid load and reliable molding properties, is mandatory for the successful manufacture of a dense glass part. The most prominent feature is the binder composition and the related comprehensive rheological characterization. In this work, a binder system consisting of polyethylene glycol and polymethylmethacrylate with stearic acid as a surfactant was selected and its suitability for glass injection molding was evaluated. The influence of all feedstock components on processing and of the process steps on the final sintered part was investigated for sintered glass parts with densities around 99% of the theoretical value. Full article
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12 pages, 4008 KiB  
Article
A Study on the Characteristics of 304 Stainless Steel According to the Water Temperature Changes in Underwater Laser Beam Machining
by Jun Yeon Lee, Dong-Hyeon Kim, Young Tae Cho and Choon Man Lee
Materials 2023, 16(23), 7463; https://doi.org/10.3390/ma16237463 - 30 Nov 2023
Viewed by 1024
Abstract
In underwater laser beam machining (ULBM), water provides a cooling effect by reducing the influence of the laser heat source, which makes ULBM more suitable for marking, cutting, and postprocessing than laser beam machining (LBM). Because the laser heat source not only affects [...] Read more.
In underwater laser beam machining (ULBM), water provides a cooling effect by reducing the influence of the laser heat source, which makes ULBM more suitable for marking, cutting, and postprocessing than laser beam machining (LBM). Because the laser heat source not only affects the substrate temperature, but also heats the water, this study analyzes how the cooling effect occurs when water is heated. In this study, the heat-transformed zones in ULBM and heated underwater laser beam machining (HULBM) were improved by approximately 33% and 24%, respectively, compared to LBM at 400 W. In addition, the heat-affected zones in ULBM and HULBM improved by approximately 15% and 9%, respectively, compared to LBM. The hardness of ULBM and HULBM was higher than that of LBM. Based on these results, it was confirmed that water can reduce the effect of the laser heat source and improve the mechanical properties. Experiments will be conducted on the underwater laser beam machining of various substrates, such as Inconel718 and Ti-6Al-4V, in a future study. In addition, experiments will be conducted on the underwater laser beam machining of various substrates using a cooling system that can lower the temperature of water. Full article
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17 pages, 14666 KiB  
Article
Laser Texturing to Increase the Wear Resistance of an Electrophoretic Graphene Coating on Copper Substrates
by Gabriele Baiocco, Silvio Genna, Daniel Salvi and Nadia Ucciardello
Materials 2023, 16(15), 5359; https://doi.org/10.3390/ma16155359 - 30 Jul 2023
Cited by 5 | Viewed by 1397
Abstract
In the present paper, different surface preparations are investigated with the aim of increasing the wear behaviour of an electrophoretic graphene coating on a copper plate. The study was divided into two steps: In the first step (pre-tests), to detect the most promising [...] Read more.
In the present paper, different surface preparations are investigated with the aim of increasing the wear behaviour of an electrophoretic graphene coating on a copper plate. The study was divided into two steps: In the first step (pre-tests), to detect the most promising pretreatment technology, five different surface preparations were investigated (electropolishing, sandblasting, degreasing and pickling, laser cleaning and laser dots).In the second step, on the basis of the results of the first step, a 32 full factorial plan was developed and tested; three treatment types (pickled and degreased, laser-cleaned, and laser dots) and three different voltages (30, 45 and 60 V) were adopted. Analysis of variance (ANOVA) was used to evaluate their influence on wear resistance; in particular, the maximum depth and width of the wear tracks and the coating break distance were investigated. The results of this study show that, in optimal conditions, laser treatment (particularly laser dots) canlead to as high as a four-fold increase in wear resistance. Full article
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13 pages, 4254 KiB  
Article
Influence of Fibre Fill Pattern and Stacking Sequence on Open-Hole Tensile Behaviour in Additive Manufactured Fibre-Reinforced Composites
by Alessia Teresa Silvestri, Ilaria Papa and Antonino Squillace
Materials 2023, 16(6), 2411; https://doi.org/10.3390/ma16062411 - 17 Mar 2023
Cited by 8 | Viewed by 1658
Abstract
Additive manufacturing has revolutionised the field of manufacturing, allowing for the production of complex geometries with high precision and accuracy. One of the most promising applications of additive manufacturing is in the production of composites, which are materials made by combining two or [...] Read more.
Additive manufacturing has revolutionised the field of manufacturing, allowing for the production of complex geometries with high precision and accuracy. One of the most promising applications of additive manufacturing is in the production of composites, which are materials made by combining two or more substances with different properties to achieve specific functional characteristics. In recent years, the use of Continuous Filament Fabrication (CFF) in additive manufacturing has become increasingly popular due to its ability to produce high-quality composite parts which have fibres with a complex orientation and high curvature. This paper aims to investigate the influence of fill pattern and stacking sequence on the open-hole tensile strength of composites manufactured using CFF and made of an innovative matrix composed of nylon and short carbon fibres, i.e., Onyx, and with continuous carbon fibre as reinforcement. By systematically varying the fill pattern and stacking sequence, we aim to identify the optimal combination that can achieve the highest open-hole tensile strength in these composites. The results of this study will provide valuable insights into the design and manufacture of high-strength composites using additive manufacturing. Open-hole strength and elastic properties are strongly influenced by the infill strategy and stacking sequences adopted, and show different failure modes. The results also point out a technological issue characterising the process and indicate some guidelines for designing and manufacturing 3D printing composites. Full article
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