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Microstructure, Mechanical Properties and Manufacturing Techniques of Advanced High-Entropy Alloys

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

Deadline for manuscript submissions: 20 October 2025 | Viewed by 471

Special Issue Editor


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Guest Editor
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: high-entropy alloys
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Special Issue Information

Dear Colleagues,

High-entropy alloys (HEAs) are a new class of materials that have garnered significant attention due to their unique composition and superior properties. HEAs exhibit remarkable mechanical performance and are typically composed of multiple principal elements, including high strength, ductility, excellent corrosion resistance, impact resistance, oxidation resistance, and thermal stability. These characteristics make HEAs particularly promising for applications in various industrial fields, including aerospace, energy, and automotive sectors.

However, the relationship between the microstructural characteristics of HEAs and their mechanical performance requires further exploration. A key issue in material design is the strength-ductility trade-off, where achieving high strength while maintaining adequate ductility is crucial for ensuring material reliability. Additionally, developing novel HEA fibers and investigating their performance in extreme environments are important research directions in this field.

This Special Issue welcomes original research manuscripts, review articles, and methodological contributions, particularly focusing on the following topics:

  • Microstructural evolution and characterization of HEAs;
  • The relationship between microstructure and mechanical performance, especially strength and ductility;
  • Manufacturing and applications of HEA fibers;
  • The influence of temperature and strain rate on the mechanical behavior of HEAs;
  • Phase transformations and their effects on the performance of HEAs;
  • Applications of HEAs in extreme environments;
  • Advanced manufacturing techniques in HEA research.

Dr. Dongyue Li
Guest Editor

Manuscript Submission Information

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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

  • high-entropy alloys
  • high-entropy alloy fibers
  • strength-ductility trade-off
  • microstructural characterization
  • mechanical performance
  • phase transformations
  • advanced manufacturing techniques
  • size effects
  • low-temperature performance
  • deformation mechanisms
  • strengthening mechanisms

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Published Papers (1 paper)

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Research

19 pages, 16623 KiB  
Article
Microstructure and Mechanical Properties of Nb35Zr26Ti19Hf15Mo5 Refractory High-Entropy Alloy Under Rolling and Heat Treatment
by Hanjun Zhang, Baohong Zhu, Wei Jiang, Haochen Qiu, Shuaishuai Wu, Xuehui Yan and Shengli Guo
Materials 2025, 18(7), 1643; https://doi.org/10.3390/ma18071643 - 3 Apr 2025
Viewed by 305
Abstract
Refractory high-entropy alloys (RHEAs) have drawn much attention in the field of materials science for their unique properties and wide compositional design space. The Nb35Zr26Ti19Hf15Mo5 alloy is important for exploring RHEAs’ potential in high-temperature [...] Read more.
Refractory high-entropy alloys (RHEAs) have drawn much attention in the field of materials science for their unique properties and wide compositional design space. The Nb35Zr26Ti19Hf15Mo5 alloy is important for exploring RHEAs’ potential in high-temperature applications. It can break through existing material limitations and bring benefits to related fields, especially in the aerospace field. This paper focuses on Nb35Zr26Ti19Hf15Mo5 RHEAs and studies the effects of cold rolling and heat treatment on its microstructure and mechanical properties. The alloy has a single-phase BCC structure. As rolling reduction rises from 20% to 80%, the alloy’s strength increases notably while plasticity drops. At 80% rolling reduction, the tensile strength reaches 1408 MPa, and the elongation is 10.5%. During rolling, grains deform along the rolling direction, the number of low-angle grain boundaries grows, and dislocation and solid solution strengthening effects are enhanced. With the increase in annealing temperature, recrystallized grains increase, and the change in grain-boundary structure weakens the strengthening effect, leading to a strength decrease and a plasticity increase. After annealing at 800 °C, the elongation reaches 17%, and the dislocation density in the alloy decreases with a recrystallization degree of 49%. Full article
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