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Recent Advances in Refractory High Entropy Alloys, 2nd Edition

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Multidisciplinary Applications".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1105

Special Issue Editors


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Guest Editor
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Interests: tungsten alloys; refractory high entropy alloys; fusion materials; non-ferrous metals; plasma-facing tungsten-based composites; functional nanomaterials; energy-related materials
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Guest Editor
School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
Interests: refractory high entropy alloys; mechanical properties; advanced manufacturing technology; bulk metallic glasses; deformation mechanism; processing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

During the past two decades, high entropy alloys (HEAs), consisting of multi-principal elements rather than one or two principal elements that exist in traditional alloys, have attracted increasing research interest due to their unique combinations of excellent properties. Through the introduction of refractory elements, refractory high entropy alloys (RHEAs) have been developed since 2010, demonstrating excellent mechanical and functional properties superior to conventional alloys, especially at elevated temperatures. Numerous studies have shown that RHEAs, with high melting points as well as high strength and good corrosion, oxidation and irradiation resistance, have great potential for use in high-temperature applications, such as turbine engines and nuclear reactors.

Although efforts have been devoted to the development of new systems of RHEAs, the investigation of their microstructure and mechanical properties and the exploration of their possible structural and functional applications, these efforts are still far from those necessary for the development of next-generation high-temperature materials. For example, the mechanisms of phase formation, plastic deformation, strengthening and high-temperature oxidation are still under debate. Similarly, the development of tungsten-containing RHEAs, which are extremely suitable for harsh environments such as in nuclear fusion reactors, is still in progress. This Special Issue aims to include the recent progress in the development, deformation mechanisms, functional properties as well as the applications of RHEAs, especially tungsten-containing RHEAs. All original research work and review articles related to the following aspects are welcome and appreciated:

  • Design and development of new RHEAs;
  • Mechanical properties and deformation mechanisms of RHEAs;
  • Functional properties of RHEAs, such as oxidation, corrosion and irradiation resistance;
  • Fabrication and processing of RHEAs;
  • Development, characterization, processing and application of tungsten alloys;
  • Advances in other refractory alloys and HEAs.

Prof. Dr. Yucheng Wu
Prof. Dr. Shunhua Chen
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. Entropy 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

  • refractory high entropy alloy
  • high-temperature application
  • mechanical property
  • deformation mechanism
  • corrosion and oxidation behavior
  • radiation damage
  • tungsten alloy
  • refractory alloy
  • processing
  • nuclear application

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Published Papers (1 paper)

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Research

15 pages, 5766 KB  
Article
Material Removal Rate Enhancement Induced by Electrochemical Discharge Machining for Refractory High-Entropy Alloys Compared with EDM
by Bolin Dong, Zirui Yao, Chen Qi, Xiaokang Yue, Zufang Zhang and Shunhua Chen
Entropy 2025, 27(9), 912; https://doi.org/10.3390/e27090912 - 29 Aug 2025
Viewed by 769
Abstract
Refractory high-entropy alloys (RHEAs) are categorized as difficult-to-machine materials due to their excellent mechanical properties. Electrical discharge machining (EDM) is a special processing method for RHEAs, which faces challenges such as low machining efficiency. In this work, electrochemical discharge machining (ECDM) was proposed [...] Read more.
Refractory high-entropy alloys (RHEAs) are categorized as difficult-to-machine materials due to their excellent mechanical properties. Electrical discharge machining (EDM) is a special processing method for RHEAs, which faces challenges such as low machining efficiency. In this work, electrochemical discharge machining (ECDM) was proposed for (TiVZrTaW)99.5N0.5 and (TiVZrTa)W5 (at. %, denoted as W20N0.5 and W5, respectively) RHEAs, and their machining performances were investigated and compared with EDM. At a peak current of 25 A, the material removal rate (MRR) using ECDM is more than twice that of EDM for W20N0.5 (reaching to 1.24 mm3/min) and 1.5 times higher than that for W5. Both W20N0.5 and W5 RHEAs exhibited higher MRR in ECDM based on the analyses of the influence of top diameter, bottom diameter, machining depth, and surface roughness (Ra). The process and mechanisms of material removal were examined through the microstructural morphology and elemental distribution analyses. This work proposed a more effective route for machining RHEAs by ECDM compared to the conventional EDM. Full article
(This article belongs to the Special Issue Recent Advances in Refractory High Entropy Alloys, 2nd Edition)
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