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Principles and Applications of 3D Printing and Additive Manufacturing

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

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 4726

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd., Taipei 106, Taiwan
Interests: high-speed additive manufacturing; design for additive manufacturing; multi-material additive manufacturing; metamaterials; functional materials; lattice tessellations; laser materials processing; liquid crystal display 3D printing; fast maskless lithography systems; functional resin development; core–shell powder manufacturing; biomaterials; metal additive manufacturing
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Guest Editor
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
Interests: advanced laser material processing; laser cutting; laser welding; additive manufacturing; laser-based powder bed fusion; multi-material additive manufacturing; hybrid metal/metal; metal/ceramic; and metal/polymer components; material extrusion

Special Issue Information

Dear Colleagues,

Additive manufacturing or Direct Digital Manufacturing (DDL) has revolutionized the manufacturing industry and explored the new horizons with unlimited design freedom. It can produce intricate as well as topology optimized functional parts which can have improved mechanical properties and light-weighting. These aspects made it one of the main pillars for industry 4.0. Furthermore, every industry has a variety of applications of this manufacturing technology. More and more research are going on to develop new materials, incorporation of new design concepts which are not possible in traditional manufacturing and to devise novel techniques for the manufacturing of functional components.

In the light of the above scenario of the growing industrial importance of additive manufacturing, this Special Issue will include and is intended to report cutting edge advances of industrial application of additive manufacturing along with innovations in the exiting techniques and in materials for this technology. It is open to both original research articles able to enhance knowledge on 3D printing and review articles to take stock of state-of-the-art literature.

The following topics can get the highest attention in this special Issue:

  • Additive manufacturing investigation and process innovations
  • Novel applications of additive manufacturing
  • Characterization (i.e., mechanical, electrical, chemical, biological) of additively manufactured components compared with simulation results
  • Additive manufacturing of metamaterials
  • Advancement of material performance through additive manufacturing
  • Tessellations of unit cells
  • Energy absorption structures e.g., wave springs, foam filled structure.

Prof. Dr. Jeng-Ywan Jeng
Dr. Yuan-Hui Chueh
Guest Editors

Manuscript Submission Information

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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
  • Metamaterials
  • Mechanical properties
  • lattice structures
  • tessellations
  • energy absorbing structures
  • Finite element analysis

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Published Papers (2 papers)

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Research

12 pages, 19176 KiB  
Article
Influence of Wobble-Based Scanning Strategy on Surface Morphology of Laser Powder Bed-Fabricated Permalloy
by Ta-Yu Huang, Chung-Wei Cheng, An-Chen Lee, Tsung-Wei Chang and Mi-Ching Tsai
Materials 2023, 16(5), 2062; https://doi.org/10.3390/ma16052062 - 2 Mar 2023
Cited by 2 | Viewed by 2089
Abstract
Surface roughness quality is still a significant problem in the laser powder bed fusion (LPBF) process. This study proposes a wobble-based scanning strategy to improve the insufficiencies of the traditional scanning strategy with regard to surface roughness. A laboratory LPBF system with a [...] Read more.
Surface roughness quality is still a significant problem in the laser powder bed fusion (LPBF) process. This study proposes a wobble-based scanning strategy to improve the insufficiencies of the traditional scanning strategy with regard to surface roughness. A laboratory LPBF system with a self-developed controller was used to fabricate Permalloy (Fe-79Ni-4Mo) with two scanning methods: traditional line scanning (LS) and the proposed wobble-based scanning (WBS). This study investigates the influences of these two scanning strategies on porosity and surface roughness. The results imply that WBS can maintain higher surface accuracy than LS, and the surface roughness can be reduced by about 45%. Furthermore, WBS can produce periodic surface structures arranged in fish scales or parallelograms with appropriate parameters. Full article
(This article belongs to the Special Issue Principles and Applications of 3D Printing and Additive Manufacturing)
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18 pages, 3058 KiB  
Article
Laser Powder Bed Fusion of Molybdenum and Mo-0.1SiC Studied by Positron Annihilation Lifetime Spectroscopy and Electron Backscatter Diffraction Methods
by Nathan E. Ellsworth, Joshua R. Machacek, Ryan A. Kemnitz, Cayla C. Eckley, Brianna M. Sexton, Joel A. Gearhart and Larry W. Burggraf
Materials 2023, 16(4), 1636; https://doi.org/10.3390/ma16041636 - 16 Feb 2023
Viewed by 2012
Abstract
Positron annihilation lifetime spectroscopy (PALS) has been used for the first time to investigate the microstructure of additively manufactured molybdenum. Despite the wide applicability of positron annihilation spectroscopy techniques to the defect analysis of metals, they have only been used sparingly to monitor [...] Read more.
Positron annihilation lifetime spectroscopy (PALS) has been used for the first time to investigate the microstructure of additively manufactured molybdenum. Despite the wide applicability of positron annihilation spectroscopy techniques to the defect analysis of metals, they have only been used sparingly to monitor the microstructural evolution of additively manufactured metals. Molybdenum and molybdenum with a dilute addition (0.1 wt%) of nano-sized silicon carbide, prepared via laser powder bed fusion (LPBF) at four different scan speeds: 100, 200, 400, and 800 mm/s, were studied by PALS and compared with electron backscatter diffraction analysis. The aim of this study was to clarify the extent to which PALS can be used to identify microstructural changes resulting from varying LPBF process parameters. Grain sizes and misorientation results do not correlate with positron lifetimes indicating the positrons are sampling regions within the grains. Positron annihilation spectroscopy identified the presence of dislocations and nano-voids not revealed through electron microscopy techniques and correlated with the findings of SiO2 nanoparticles in the samples prepared with silicon carbide. The comparison of results indicates the usefulness of positron techniques to characterize nano-structure in additively manufactured metals due to the significant increase in atomic-level information. Full article
(This article belongs to the Special Issue Principles and Applications of 3D Printing and Additive Manufacturing)
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