Additive Manufacturing of Intermetallics: Process, Microstructures and Mechanical Properties

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

Deadline for manuscript submissions: closed (25 March 2025) | Viewed by 1763

Special Issue Editor


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Guest Editor
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100000, China
Interests: termetallics; additive manufacturing (3D printing) for advanced materials; severe deformation and structure control for hard-deformed materials
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Special Issue Information

Dear Colleagues,

Intermetallics have the advantages of high specific strength, excellent high-temperature resistance, corrosion resistance, superior electronic properties, oxidation resistance, and special physical properties, which make them of great value in technical fields and engineering applications. At the same time, they also have disadvantages, such as a high cost and difficulty in processing and brittleness, restricting their practical application. Additive manufacturing (AM), which realizes the three-dimensional near-forming of components by stacking them layer by layer, has high manufacturing efficiency and is easy to use to realize the free design of components, and has become a research hotspot in the preparation of intermetallic compounds. The increasing market share of AM, that, at the same time, reduces the use of traditional manufacturing technologies, remains a clearly noticeable trend and evident source of development of new materials and technologies. The advantages of this method quickly brought new consumers, expanding its potential application to this group of metals, their alloys, and composite structures. The additive manufacturing of intermetallics, which includes the control and characterization of the material in all processing steps with its final properties analysis, are the scope for this Special Issue.

In this Special Issue, we welcome articles that focus on process methods for the additive manufacturing of intermetallics, relationships among process- microstructures–mechanical properties, and their influence on the final products’ performance. Fully controllable fast and low-cost processes especially remain of interest, with a high implementation potential in the preparation of intermetallics that allows us to produce high-performance products.

Prof. Dr. Junpin Lin
Guest Editor

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Keywords

  • intermetallics
  • alloying design
  • laser additive manufacturing
  • electron beam additive manufacturing
  • arc additive manufacturing
  • process optimization
  • strengthening mechanism
  • structural characterization
  • numerical simulation of additive manufacturing

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Published Papers (2 papers)

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Research

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13 pages, 6663 KiB  
Article
Effects of HIP on Microstructure and Mechanical Properties of LMD Fe36Mn21Cr1815NiAl10 High-Entropy Alloy
by Gang Wang, Xvteng Lv, Xiangyu Xv and Runbo Zhang
Metals 2024, 14(12), 1452; https://doi.org/10.3390/met14121452 - 18 Dec 2024
Viewed by 649
Abstract
To reduce costs, a cobalt-free FeMnCrNi-based HEA has been proposed. Further investigation into the mechanical properties of the Fe36Mn21Cr18Ni15Al10 alloy is essential to expand its application potential. In this study, a cobalt-free Fe36Mn21Cr18Ni15Al10 HEA was fabricated using LMD, and the effects of HIP [...] Read more.
To reduce costs, a cobalt-free FeMnCrNi-based HEA has been proposed. Further investigation into the mechanical properties of the Fe36Mn21Cr18Ni15Al10 alloy is essential to expand its application potential. In this study, a cobalt-free Fe36Mn21Cr18Ni15Al10 HEA was fabricated using LMD, and the effects of HIP on its microstructure and mechanical properties were investigated. Results indicated that the as-printed specimen exhibited a dual-phase structure consisting of BCC and FCC phases, with the B2 phase dispersed as fine blocks. After HIP treatment, the content of the FCC phase significantly increased, displaying a lamellar distribution between the BCC phases, with secondary block-like B2 phases forming within the BCC matrix. The HIP process enhanced the density of the high-entropy alloy to 98.2%, while the tensile strength at 25 °C increased to 903.9 MPa. Additionally, the post-fracture elongation improved to 17.4%, thereby increasing the potential for industrial applications of HEAs. Full article
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Review

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30 pages, 62508 KiB  
Review
Research Advances in Additively Manufactured High-Entropy Alloys: Microstructure, Mechanical Properties, and Corrosion Resistance
by Feng Han, Chunyang Li, Jiqiang Huang, Jiacai Wang, Long Xue, Caimei Wang and Yu Zhang
Metals 2025, 15(2), 136; https://doi.org/10.3390/met15020136 - 29 Jan 2025
Viewed by 894
Abstract
High-entropy alloys have garnered significant attention due to their unique composition and exceptional properties. Additive manufacturing technology, with its distinctive processing methods, offers new options for the fabrication of high-entropy alloys. However, due to the diversity of high-entropy alloys and additive manufacturing technologies, [...] Read more.
High-entropy alloys have garnered significant attention due to their unique composition and exceptional properties. Additive manufacturing technology, with its distinctive processing methods, offers new options for the fabrication of high-entropy alloys. However, due to the diversity of high-entropy alloys and additive manufacturing technologies, it is imperative to provide a comprehensive overview of the high-entropy alloys produced using various additive manufacturing methods. This paper presents a summary of the microstructure, mechanical properties, and corrosion resistance of high-entropy alloys fabricated using different additive manufacturing techniques. This paper initially reviews the impact of various additive manufacturing process parameters and the influence of different elements on the microstructure of additively manufactured high-entropy alloys. Subsequently, it discusses the effects of different additive manufacturing techniques on mechanical properties and summarizes four strengthening mechanisms in additively manufactured high-entropy alloys. Additionally, the corrosion resistance of various additively manufactured high-entropy alloys is summarized. Finally, based on the review of additively manufactured high entropy alloys presented in this paper, the current challenges and future research directions are proposed. Full article
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