Recent Developments and Applications of Laser-Based Additive Manufacturing (LBAM) Technologies

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D3: 3D Printing and Additive Manufacturing".

Deadline for manuscript submissions: closed (31 January 2025) | Viewed by 1257

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Faculty of Engineering and Physical Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK
Interests: additive manufacturing; engineering design and manufacturing; crashworthiness, fuel cell technology
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Special Issue Information

Dear Colleagues,

Additive manufacturing (AM) is a fast-growing field that continues to receive a great deal of research interest from academic and industrial communities. AM provides significant technical, economical, and sustainable advantages over conventional manufacturing (CM); therefore, different industrial sectors, such as biomedical, aerospace, automotive, and energy sectors, started adopting AM as a main manufacturing stream for many of their respective functional products. Among available AM technologies, laser-based additive manufacturing (LBAM) technologies, such as laser powder bed fusion (LPBF) and direct energy deposition (DED), are of particular importance for fabricating metallic parts. Developing a reliable part using LBAM technology is a challenging task and requires optimizing a set of process parameters and material properties to avoid common defects such as pores, unmelted powders, micro-cracks, etc.

This Special Issue focuses on recent developments and applications of LBAM technologies. This Special Issue covers various aspects related to LBAM processes and products, such as process optimization, computational modelling, experimental testing, new materials, new designs, novel applications, and performance evaluation.

Dr. Ahmad Baroutaji
Guest Editor

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Keywords

  • laser-based additive manufacturing
  • selective laser melting
  • laser powder bed fusion
  • selective laser sintering
  • direct energy deposition
  • numerical modelling
  • process optimization

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Published Papers (1 paper)

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Research

12 pages, 7063 KiB  
Article
Investigation of the 4D Multi-Material 316L/FeNi36 Obtained by Selective Laser Melting
by Arseniy Repnin, Evgenii Borisov, Aleksey Maksimov, Daria Rozhkova and Anatoly Popovich
Micromachines 2024, 15(11), 1288; https://doi.org/10.3390/mi15111288 - 23 Oct 2024
Viewed by 833
Abstract
Multi-material can have functional properties, which are not typical for the materials of which they are composed (for instance, shape-changing effect). This can be used in robotics, micromachines, aerospace, and other fields. In this work, the 316L/FeNi36 multi-material produced by selective laser melting [...] Read more.
Multi-material can have functional properties, which are not typical for the materials of which they are composed (for instance, shape-changing effect). This can be used in robotics, micromachines, aerospace, and other fields. In this work, the 316L/FeNi36 multi-material produced by selective laser melting was investigated. The results show that the interfacial zone of the multi-material exhibits mixing regions of the two alloys but no defects. The microstructure is constituted by large grains with epitaxial growth, which propagate in a directional manner from the 316L alloy through the interfacial zone to the FeNi36 region. The multi-material sample displays three different zones of chemical composition: the FeNi36 composition zone; the interfacial zone; and the 316L zone. The size of the interfacial zone is approximately 50 µm. The multi-material sample exhibits the presence of three distinct phases: γ-Fe; γ-Fe64Ni36; and α-Fe. The hardness of the FeNi36 zone is approximately 163 HV, followed by an interfacial zone with a hardness of approximately 200 HV and then, the 316L zone with a hardness of approximately 214 HV. Functional tests demonstrate that the shape-changing effect is directly correlated with the variation in the FeNi36 thermal expansion coefficient with temperature. For achieving the most pronounced shape-changing effect, the temperature range of 25–215 °C is more suitable. Full article
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