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Metals
Special Issues
Design, Microstructure, and Mechanical Properties of Medium-Entropy and High-Entropy Alloys
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Design, Microstructure, and Mechanical Properties of Medium-Entropy and High-Entropy Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Entropic Alloys and Meta-Metals".

Deadline for manuscript submissions: 31 March 2027 | Viewed by 1613

Editors

Dr. Jing Peng

E-Mail Website
Guest Editor
State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China
Interests: high-entropy alloys; additive manufacturing; microstructure and mechanical properties
Dr. Li Li

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
Interests: multi-field coupling computing in extreme service environments; integrated design for metal material processing and service; artificial intelligence-driven intelligent manufacturing
Dr. Fusheng Tan

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Interests: micro-nano deformation mechanism of high-entropy alloys; multi-scale method for irradiation damage of high-entropy alloys; data-driven research on the properties of metal defects

Special Issue Information

Dear Colleagues,

Medium-entropy and high-entropy alloys (MEAs and HEAs) represent an exciting and rapidly advancing frontier in materials science and engineering. By incorporating multiple principal elements into near-equiatomic or high-entropy compositions, these alloys exhibit unique microstructures and exceptional mechanical properties, such as high strength, excellent ductility, outstanding fracture toughness, and superior resistance to wear, corrosion, and radiation. These attributes make them highly promising candidates for critical applications in aerospace, energy, transportation, and other advanced engineering sectors operating under demanding conditions.

This Special Issue on “Design, Microstructure, and Mechanical Properties of Medium-Entropy and High-Entropy Alloys” aims to gather the latest research and developments in this dynamic field. We invite contributions that explore novel alloy design strategies, microstructure characterization, phase stability, deformation mechanisms, and the relationships between composition, processing, microstructure, and properties in MEAs and HEAs. Studies employing advanced experimental techniques, computational modeling, machine learning, and multi-scale simulations are particularly welcome. Topics of interest also include the development of new MEA/HEA systems, their behavior under extreme environments, and their potential for welding, coating, additive manufacturing, and other joining or fabrication processes.

We encourage researchers to submit original research articles and reviews that will deepen the understanding and expand the application horizons of medium-entropy and high-entropy alloys.

Dr. Jing Peng
Dr. Li Li
Dr. Fusheng Tan
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized 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

  • alloy design strategies for medium- and high-entropy alloys
  • microstructure characterization and phase stability
  • mechanical properties and deformation mechanisms
  • phase formation and transformation in multi-principal element alloys
  • computational modeling and simulation of MEA/HEA
  • fracture toughness and fatigue behavior
  • extreme environment performance (radiation, corrosion, high temperature)
  • advanced manufacturing and processing of MEAs/HEAs

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

13 pages, 7573 KB  
Article
Mechanical Properties and Deformation Behaviors of Metastable Fe50Mn20Ni20Cr10 High-Entropy Alloy at Ambient and Cryogenic Temperatures
by Jingwei Liu, Bo Zhang, Nanxuan Mei and Shenghang Xu
Metals 2026, 16(3), 304; https://doi.org/10.3390/met16030304 - 9 Mar 2026
Cited by 9 | Viewed by 740
Abstract
A single-phase FCC structure of the Fe50Mn20Ni20Cr10 high-entropy alloy (HEA) was fabricated by vacuum arc melting. The mechanical properties and deformation mechanisms at both ambient and cryogenic temperatures were systematically investigated. The results reveal that the [...] Read more.
A single-phase FCC structure of the Fe50Mn20Ni20Cr10 high-entropy alloy (HEA) was fabricated by vacuum arc melting. The mechanical properties and deformation mechanisms at both ambient and cryogenic temperatures were systematically investigated. The results reveal that the Fe50Mn20Ni20Cr10 HEA exhibits an ultimate tensile strength of 763 ± 30 MPa and an elongation of 66 ± 3.2% at 77 K. These values represent 58% and 35% increases, respectively, when compared with the alloy’s tensile properties measured at ambient temperature. The significantly enhanced yield strength and sustained stable strain-hardening behavior owing to the deformation-induced twinning and phase-transformation capabilities at 77 K. The twinning-prone matrix is capable of inducing more pronounced twinning-induced plasticity (TWIP) effects, thereby contributing to superior ductility of the alloy. Owing to the significant enhancement in both strength and ductility at 77 K, this alloy provides a new perspective for the design of chemical composition and mechanical deformation behavior of high-performance HEAs used in low-temperature environments. Full article
(This article belongs to the Special Issue Design, Microstructure, and Mechanical Properties of Medium-Entropy and High-Entropy Alloys)
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23 pages, 7847 KB  
Article
Multi-Physics Coupling Parameter Analysis of TiZrHf Medium Entropy Alloy
by Mengzhou Chang, Bo Wang, Chuang Chen and Enling Tang
Metals 2026, 16(3), 274; https://doi.org/10.3390/met16030274 - 28 Feb 2026
Viewed by 496
Abstract
The complex coupling relationships among the thermal, mechanical, and electrical physical parameters of TiZrHf-based medium-entropy alloys represent a key factor restricting their practical applications under complex extreme environments. In this study, the thermo-mechanical-electrical coupling characteristics of TiZrHf and TiZrHfCu0.8 medium-entropy alloys were [...] Read more.
The complex coupling relationships among the thermal, mechanical, and electrical physical parameters of TiZrHf-based medium-entropy alloys represent a key factor restricting their practical applications under complex extreme environments. In this study, the thermo-mechanical-electrical coupling characteristics of TiZrHf and TiZrHfCu0.8 medium-entropy alloys were systematically investigated using a self-developed experimental platform. The results demonstrate that TiZrHf and TiZrHfCu0.8 alloys exhibit elastoplastic and superelastic-plastic compressive deformation behaviors, respectively, with both elastic modulus and ultimate strength decreasing monotonically with increasing temperature T. Electrical property measurements reveal that the electrical resistivities ρ of the two alloys range from 3 to 35 × 10−6 Ω·m. Notably, TiZrHfCu0.8 possesses a lower resistivity that is independent of the test frequency f. Moreover, ρ increases with T but decreases with applied stress σ. At a frequency of 1 kHz, the real part of the relative dielectric constants εr of the alloys varies between −3.5 × 108 and −0.5 × 108 and increases with rising f, whereas the effects of T and σ on εr are opposite to those on ρ. Thermal property tests indicate that the thermal conductivities α of both alloys increase with T and eventually stabilize at 28.23 and 53.51 W·m−1·K−1, respectively, while the thermoelectric coefficients S are positively correlated with the heating rate, on the basis of comprehensive data analysis, multi-physical parameter (T, σ) dependent mathematical expressions for elastic modulus, strength, ρ, εr, α, and S were established, respectively. This work provides valuable insights into the material response mechanisms under complex service conditions, which are conducive to the optimization of alloy composition design and the promotion of their practical engineering applications. Full article
(This article belongs to the Special Issue Design, Microstructure, and Mechanical Properties of Medium-Entropy and High-Entropy Alloys)
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