Advances in Microstructural Evolution and Mechanical Properties of Additively Manufactured Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Additive Manufacturing".

Deadline for manuscript submissions: closed (28 February 2024) | Viewed by 1147

Special Issue Editors


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Guest Editor
Equispheres Inc., 500 Palladium Dr #4100, Kanata, ON K2V 1C2, Canada
Interests: additive manufacturing; powder metallurgy; aluminum alloys; nickel-based superalloys; microstructure; alloy design; fatigue

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Guest Editor
Department of Mechanical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
Interests: thermomechanical processing; development of novel alloys; mechanical properties and deformation behavior of materials; phase transformation in metal alloys; static and dynamic materials testing; high-strain rate deformation; static and dynamic recrystallization; materials characterization; texture and anisotropy of materials; thermodynamics of materials; additive manufacturing of metallic materials
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Special Issue Information

Dear Colleagues,

Additive manufacturing technologies have evolved in recent years to overcome barriers for industrial adoption. Important innovations in the processes, materials, and design tools are allowing not only the prototyping of components but also the production of parts based on the desired performance. In metallic alloy systems, the unique microstructure resulting from the combination of materials and processes is of paramount importance in understanding the mechanical performance of components under specific loading conditions. Changes in the process associated with modifications to the energy input, beam shape, or layer thickness are typical examples of what the industry is carrying out to increase the production throughput of additive systems. Furthermore, the adoption of novel materials designed to account for the rapid solidification phenomena occurring during processing is allowing for the design of new applications that would not be possible with traditional manufacturing techniques. A deep understanding of microstructure evolution related to the functions of the additive process, materials, and post-processing is necessary in the additive manufacturing community. The knowledge acquired by such efforts will help the community to further adopt the technology in industrial settings, improve current processes and designs, and develop novel materials designed for additive manufacturing processes.

This Special Issue is devoted to publishing high-quality research aiming to understand the effect of microstructure evolution at different stages of the additive process and its relationship with the mechanical performance. Researchers are invited to submit relevant work not only related to legacy alloy systems but also to new alloys designed for additive manufacturing.

Dr. Jose Muñiz-Lerma
Dr. Clodualdo Aranas
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. Metals is an international peer-reviewed open access monthly 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

  • microstructure
  • rapid solidification
  • laser powder bed fusion
  • electron beam powder bed fusion
  • direct energy deposition
  • binder jetting
  • mechanical properties
  • alloy design
  • solid-state additive manufacturing
  • heat treatment
  • hot isostatic pressure

Published Papers (1 paper)

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Research

14 pages, 3891 KiB  
Article
Effects of Fe Contents on the Microstructure and Precipitate of Ti–Al–V Alloys Prepared by Direct Energy Deposition
by Zijian He, Wanwan Yang, Cheng Liu, Xiao Wei and Jiangwei Wang
Metals 2024, 14(2), 198; https://doi.org/10.3390/met14020198 - 06 Feb 2024
Viewed by 926
Abstract
This study investigated the influence of Fe content on the microstructure and mechanical properties of Ti–6Al–4V(TC4) + 25Ti alloys prepared by low-energy-density direct energy deposition (DED) technology. With the incorporation of the Fe elements, the α-Ti phases exhibited significant changes in size [...] Read more.
This study investigated the influence of Fe content on the microstructure and mechanical properties of Ti–6Al–4V(TC4) + 25Ti alloys prepared by low-energy-density direct energy deposition (DED) technology. With the incorporation of the Fe elements, the α-Ti phases exhibited significant changes in size and morphology, while the numerous β-Ti phases and some triclinic-Ti precipitates were retained. With the refinement of the α-Ti phase, retainment of the β-Ti phase and the presence of triclinic-Ti precipitates, the mechanical properties of DED samples can be significantly improved compared with DED TC4 alloys. The room-temperature mechanical property tests showed that the ultimate tensile strength (UTS) of 3Fe + TC4 + 25Ti achieved 1298.64 ± 5.26 MPa with an elongation of 4.82% ± 0.20%, and the maximum elongation of 1Fe + TC4 + 25Ti reached 10.82% ± 0.82% with a UTS of 1076.95 ± 11.69 MPa. The strengthening mechanism of DED Ti-Al-V-Fe alloys were further discussed, providing new insights into the microstructure control and the composition design of additive manufacturing of Ti alloys. Full article
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