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3D Printing Materials: Innovation, Design and Future Technology
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3D Printing Materials: Innovation, Design and Future Technology

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Simulation and Design".

Deadline for manuscript submissions: closed (20 January 2024) | Viewed by 9427

Special Issue Editor

Dr. Iulia Salaoru

E-Mail Website
Guest Editor
School of Engineering and Sustainable Development, De Montfort University, Leicester, UK
Interests: additive layer manufacturing; inkjet printing; flexible electronics; functional materials; electronic memory devices; ReRAM; photovoltaics

Special Issue Information

Dear Colleagues,

Nowadays, the challenges that the conventional/traditional electronic device industry faces are that the fabrication pathway is complex, there is a high level of generation of heat/harmful chemicals in the deposition process, a high volume of raw material being wasted and also relies on rigid substrates that do not match with the needs of the industry for flexible, bendable electronics. The 3D printing technology is based on the Additive Manufacturing concept and it is no doubt capable of revolutionising the whole system of manufacturing electronic devices including material selection; design and fabrication steps and device configuration and architecture.

This Special Issue will encompass few of the most important aspects of 3D printing, that are shared by all types of the emerging electronic devices, such as: Materials, Innovation, Design and Manufacturing Technologies. We invite both the academia and industry communities to join togheter and to contribute either by research articles, comments or reviews to this Special Issue.

Dr. Iulia Salaoru
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

  • 3D manufacturing technologies
  • advanced materials for 3d printing
  • 3D printed energy storage devices
  • 3D printed sensors
  • 3D printing actuators
  • 3D printed memory devices
  • 3D printed photovoltaics
  • 3D printed photonics

Published Papers (4 papers)

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Research

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25 pages, 10319 KiB  
Article
Assessment of Additive Manufactured IN 625’s Tensile Strength Based on Nonstandard Specimens
by Alexandru Paraschiv, Gheorghe Matache, Mihaela Raluca Condruz and Cristian Dobromirescu
Materials 2023, 16(14), 4930; https://doi.org/10.3390/ma16144930 - 10 Jul 2023
Cited by 2 | Viewed by 1239
Abstract
The study aimed to evaluate the tensile strength of additively manufactured (AMed) IN 625 using sub-sized test pieces and compare them to standard specimens. Cylindrical round coupons of varying diameters were manufactured along the Z-axis using the laser powder bed fusion technique [...] Read more.
The study aimed to evaluate the tensile strength of additively manufactured (AMed) IN 625 using sub-sized test pieces and compare them to standard specimens. Cylindrical round coupons of varying diameters were manufactured along the Z-axis using the laser powder bed fusion technique and subjected to heat treatment. The simulation of the alloy solidification predicted the formation of several intermetallics and carbides under equilibrium conditions (slow cooling), apart from the γ phase (FCC). Sub-sized tensile specimens with different gauge diameters were machined from the coupons and tensile tested at ambient temperature. The results showed that sub-sized specimens exhibited lower tensile and yield strengths compared to standard specimens, but still higher than the minimum requirements of the relevant ASTM standard for AMed IN 625. The lower strength was attributed to the “size effect” of the test specimens. Fracture surfaces of the sub-sized test specimens exhibit a mixed character, combining cleavage and microvoid coalescence, with improved ductility compared to standard test pieces. The study highlights the importance of adapting characterization methods to the particularities of manufactured parts, including reduced thicknesses that make sampling standard-size specimens impractical. It concludes that sub-sized specimens are valuable for quality control and verifying compliance with requirements of AMed IN 625 tensile properties. Full article
(This article belongs to the Special Issue 3D Printing Materials: Innovation, Design and Future Technology)
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17 pages, 28797 KiB  
Article
Possibilities of Using Selected Additive Methods for the Production of Polymer Harmonic Drive Prototypes
by Jacek Pacana, Andrzej Pacana and Rafał Oliwa
Materials 2023, 16(11), 4073; https://doi.org/10.3390/ma16114073 - 30 May 2023
Viewed by 1083
Abstract
This article includes an analysis of the possibility of using polymer materials for the production of harmonic drive. The use of additive methods greatly eases and accelerates the manufacturing of the flexspline. In the case of gears made of polymeric materials using rapid [...] Read more.
This article includes an analysis of the possibility of using polymer materials for the production of harmonic drive. The use of additive methods greatly eases and accelerates the manufacturing of the flexspline. In the case of gears made of polymeric materials using rapid prototyping (RP) methods, the problem is often with their mechanical strength. In a harmonic drive, the wheel is uniquely exposed to damage, because during work, it deforms and is additionally loaded with torque. Therefore, numerical calculations were conducted using the finite element method (FEM) in the Abaqus program. As a result, information was obtained on the distribution of stresses in the flexspline and their maximum values. On this basis, it was possible to determine whether a flexspline made of specific polymers could be used in commercial harmonic drives or whether they were only adequate for the production of prototypes. Full article
(This article belongs to the Special Issue 3D Printing Materials: Innovation, Design and Future Technology)
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14 pages, 8067 KiB  
Article
Enhancing Mechanical Properties of 3D Printing Metallic Lattice Structure Inspired by Bambusa Emeiensis
by Shikai Jing, Wei Li, Guanghao Ma, Xiaofei Cao, Le Zhang, Liu Fang, Jiaxu Meng, Yujie Shao, Biwen Shen, Changdong Zhang, Huimin Li, Zhishuai Wan and Dengbao Xiao
Materials 2023, 16(7), 2545; https://doi.org/10.3390/ma16072545 - 23 Mar 2023
Viewed by 1553
Abstract
Metallic additive manufacturing process parameters, such as inclination angle and minimum radius, impose constraints on the printable lattice cell configurations in complex components. As a result, their mechanical properties are usually lower than their design values. Meanwhile, due to unavoidable process constraints (e.g., [...] Read more.
Metallic additive manufacturing process parameters, such as inclination angle and minimum radius, impose constraints on the printable lattice cell configurations in complex components. As a result, their mechanical properties are usually lower than their design values. Meanwhile, due to unavoidable process constraints (e.g., additional support structure), engineering structures filled with various lattice cells usually fail to be printed or cannot achieve the designed mechanical performances. Optimizing the cell configuration and printing process are effective ways to solve these problems, but this is becoming more and more difficult and costly with the increasing demand for properties. Therefore, it is very important to redesign the existing printable lattice structures to improve their mechanical properties. In this paper, inspired by the macro- and meso-structures of bamboo, a bionic lattice structure was partitioned, and the cell rod had a radius gradient, similar to the macro-scale bamboo joint and meso-scale bamboo tube, respectively. Experimental and simulated results showed that this design can significantly enhance the mechanical properties without adding mass and changing the printable cell configuration. Finally, the compression and shear properties of the Bambusa-lattice structure were analyzed. Compared with the original scheme, the bamboo lattice structure design can improve the strength by 1.51 times (β=1.5). This proposed strategy offers an effective pathway to manipulate the mechanical properties of lattice structures simultaneously, which is useful for practical applications. Full article
(This article belongs to the Special Issue 3D Printing Materials: Innovation, Design and Future Technology)
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Review

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91 pages, 8892 KiB  
Review
Additive Manufacturing Post-Processing Treatments, a Review with Emphasis on Mechanical Characteristics
by Alin Diniță, Adrian Neacșa, Alexandra Ileana Portoacă, Maria Tănase, Costin Nicolae Ilinca and Ibrahim Naim Ramadan
Materials 2023, 16(13), 4610; https://doi.org/10.3390/ma16134610 - 26 Jun 2023
Cited by 23 | Viewed by 4989
Abstract
Additive manufacturing (AM) comes in various types of technologies and comparing it with traditional fabrication methods provides the possibility of producing complex geometric parts directly from Computer-Aided Designs (CAD). Despite answering challenges such as poor workability and the need for tooling, the anisotropy [...] Read more.
Additive manufacturing (AM) comes in various types of technologies and comparing it with traditional fabrication methods provides the possibility of producing complex geometric parts directly from Computer-Aided Designs (CAD). Despite answering challenges such as poor workability and the need for tooling, the anisotropy of AM constructions is the most serious issue encountered by their application in industry. In order to enhance the microstructure and functional behavior of additively fabricated samples, post-processing treatments have gained extensive attention. The aim of this research is to provide critical, comprehensive, and objective methods, parameters and results’ synthesis for post-processing treatments applied to AM builds obtained by 3D printing technologies. Different conditions for post-processing treatments adapted to AM processes were explored in this review, and demonstrated efficiency and quality enhancement of parts. Therefore, the collected results show that mechanical characteristics (stress state, bending stress, impact strength, hardness, fatigue) have undergone significant improvements for 3D composite polymers, copper-enhanced and aluminum-enhanced polymers, shape memory alloys, high-entropy alloys, and stainless steels. However, for obtaining a better mechanical performance, the research papers analyzed revealed the crucial role of related physical characteristics: crystallinity, viscosity, processability, dynamic stability, reactivity, heat deflection temperature, and microstructural structure. Full article
(This article belongs to the Special Issue 3D Printing Materials: Innovation, Design and Future Technology)
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