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Development and Applications of Laser-Based 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: 20 August 2024 | Viewed by 735

Special Issue Editors


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Guest Editor
Laser Processing Research Center, School of Mechanical and Electric Engineering, Soochow University, Suzhou 215131, China
Interests: laser metal deposition (laser additive manufacturing, laser cladding); laser welding; laser hardening; remanufacturing; coating

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Guest Editor
Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
Interests: additive manufacturing; metallurgy science; advanced manufacturing

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Guest Editor
Department of Engineering and Mathematics, Sheffield Hallam University, Sheaf Street, Sheffield S1 1WB, UK
Interests: lasers; additive manufacturing; material characterisation; mechanical properties

Special Issue Information

Dear Colleagues,

Manufacturing technology is crucial for the advancement of humankind. Therefore, there is an ongoing effort to continuously improve and enhance manufacturing techniques that can facilitate rapid, sustainable, and cost-effective production of a wide array of materials. Amidst this ongoing human endeavour, several breakthroughs have been made in manufacturing technologies. However, none have been as promising and prevalent in recent times as the development of additive manufacturing (AM) technologies.

Additive manufacturing entails the layered deposition of materials and the cohesion of these layers to create intricate parts in a single-step process. Among the most effective methods for joining these successive layers is the utilisation of lasers as targeted heat sources for fusing the layers. Consequently, lasers have emerged as invaluable tools in AM, particularly for metal processing. Additive manufacturing with lasers offers unique advantages, including the ability to create functionally graded parts and achieve tuneable microstructure properties, to name a few.

Due to their numerous advantages, AM techniques find application in nearly every sector and are of particular interest to the aerospace, electronics, and medical fields. Although laser-based AM has undergone extensive investigation in recent years, it still holds significant untapped potential. Additionally, with the development of new materials and advancements in laser systems, there is a growing need for further exploration.

Hence, this Special Issue aims to explore the latest developments and applications of laser-based additive manufacturing.

Prof. Dr. Changjun Chen
Dr. Chaolin Tan
Dr. Ashfaq Khan
Guest Editors

Manuscript Submission Information

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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

  • lasers
  • additive manufacturing
  • 3D printing
  • materials processing
  • selective laser melting
  • selective laser sintering
  • direct metal deposition
  • microstructure

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Published Papers (1 paper)

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Research

13 pages, 13807 KiB  
Article
Simulation and Experimental Investigation on Additive Manufacturing of Highly Dense Pure Tungsten by Laser Powder Bed Fusion
by Enwei Qin, Wenli Li, Hongzhi Zhou, Chengwei Liu, Shuhui Wu and Gaolian Shi
Materials 2024, 17(16), 3966; https://doi.org/10.3390/ma17163966 - 9 Aug 2024
Viewed by 297
Abstract
Tungsten and its alloys have a high atomic number, high melting temperature, and high thermal conductivity, which make them fairly appropriate for use in nuclear applications in an extremely harsh radioactive environment. In recent years, there has been growing research interest in using [...] Read more.
Tungsten and its alloys have a high atomic number, high melting temperature, and high thermal conductivity, which make them fairly appropriate for use in nuclear applications in an extremely harsh radioactive environment. In recent years, there has been growing research interest in using additive manufacturing techniques to produce tungsten components with complex structures. However, the critical bottleneck for tungsten engineering manufacturing is the high melting temperature and high ductile-to-brittle transition temperature. In this study, laser powder bed fusion has been studied to produce bulk pure tungsten. And finite element analysis was used to simulate the temperature and stress field during laser irradiation. The as-printed surface as well as transverse sections were observed by optical microscopy and scanning electron microscopy to quantitatively study processing defects. The simulated temperature field suggests small-sized powder is beneficial for homogenous melting and provides guidelines for the selection of laser energy density. The experimental results show that ultra-dense tungsten bulk has been successfully obtained within a volumetric energy density of 200–391 J/mm3. The obtained relative density can be as high as 99.98%. By quantitative analysis of the pores and surface cracks, the relationships of cracks and pores with laser volumetric energy density have been phenomenologically established. The results are beneficial for controlling defects and surface quality in future engineering applications of tungsten components by additive manufacturing. Full article
(This article belongs to the Special Issue Development and Applications of Laser-Based Additive Manufacturing)
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