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Advances in Physical Metallurgy of Additively Manufactured Alloys

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

Deadline for manuscript submissions: 20 July 2025 | Viewed by 1166

Special Issue Editors


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Guest Editor
School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia
Interests: superalloys; titanium alloys; steels; metal matrix composites; additive manufacturing; microstructure; electron microscopy; atom probe

E-Mail Website
Guest Editor
School of Materials Science and Engineering, UNSW Sydney, NSW, Australia
Interests: superalloys; titanium alloys; steels; metal matrix composites; additive manufacturing; microstructure; electron microscopy; atom probe

Special Issue Information

Dear Colleagues,

The Special Issue titled "Advances in Physical Metallurgy of Additively Manufactured Alloys" explores the intricate landscape of additive manufacturing (AM) applied to metallic materials. We seek submissions that delve into the microstructure–property–processing relationship in metals and alloys manufactured through various AM technologies, encompassing various materials from nickel and titanium alloys to steel and high-entropy alloys. Powder bed fusion, direct metal deposition, and cold spray additive manufacturing are among the targeted technologies. Contributions examining microstructural characterisation after various post-treatments are encouraged. This interdisciplinary endeavour aims to bridge the gap between traditional physical metallurgy and the unique challenges posed by AM by addressing barriers like material selection, consistency, repeatability, accuracy, and post-processing requirements in AM. These are pivotal for the widespread adoption of AM. Therefore, we encourage submissions that drive the progress of technical innovation, process optimisation, and material development.

By fostering collaboration and disseminating cutting-edge research, this Special Issue aims to accelerate the development of AM-manufactured alloys for various industries, including aerospace, automotive, maritime, and biomedical. Full papers, short communications, case studies, and reviews advancing our understanding and application of physical metallurgy in additive manufacturing are welcomed.

I look forward to receiving your contributions.

Dr. Andrew Breen
Dr. Vitor Rielli
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

  • superalloys
  • titanium alloys
  • steels
  • additive manufacturing
  • 3D printing
  • microstructure
  • mechanical properties
  • electron microscopy
  • atom probe

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Published Papers (1 paper)

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Research

14 pages, 11614 KiB  
Article
Influence of Heat Treatment on the Microstructure and Mechanical Properties of Pure Copper Components Fabricated via Micro-Laser Powder Bed Fusion
by Shuo Qu, Liqiang Wang, Junhao Ding, Yang Lu and Xu Song
Materials 2024, 17(24), 6270; https://doi.org/10.3390/ma17246270 - 22 Dec 2024
Viewed by 814
Abstract
Pure copper (Cu) is widely used across numerous industries owing to its exceptional thermal and electrical conductivity. Additive manufacturing has facilitated the rapid and cost-effective prototyping of Cu components. Laser powder bed fusion (LPBF) has demonstrated the capability to produce intricate Cu components. [...] Read more.
Pure copper (Cu) is widely used across numerous industries owing to its exceptional thermal and electrical conductivity. Additive manufacturing has facilitated the rapid and cost-effective prototyping of Cu components. Laser powder bed fusion (LPBF) has demonstrated the capability to produce intricate Cu components. However, LPBF-fabricated components exhibit anisotropic features, which stem from their inherent thermal gradients, resulting in properties that depend on the grain orientation. In the present study, pure Cu samples were fabricated via micro-laser powder bed fusion (μLPBF), resulting in improved mechanical properties, specifically, enhanced strength and ductility. The as-printed pure Cu sample exhibited thermal stability owing to its high-density grain boundaries and dislocations, enabling it to maintain relatively high levels of strength and ductility even when exposed to an elevated temperature of 300 °C. Furthermore, the heat treatment resulted in the disappearance of the initial microstructural characteristics, such as molten pool boundaries. As the heat-treatment temperature increased, the anisotropic yield strength decreased. Overall, the anisotropy of the properties of pure Cu components fabricated via μLPBF can be mitigated through heat-treatment-induced microstructural adjustments. Full article
(This article belongs to the Special Issue Advances in Physical Metallurgy of Additively Manufactured Alloys)
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