Preparation and Applications of High-Entropy Materials

A special issue of Crystals (ISSN 2073-4352).

Deadline for manuscript submissions: 30 November 2024 | Viewed by 342

Special Issue Editor


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Guest Editor
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, China
Interests: high entropy materials; structure and properties of materials; material design; physical property regulation; high entropy catalysis

Special Issue Information

Dear Colleagues,

Since high-entropy alloys (HEAs) were proposed, they have drawn extensive attention and brought many opportunities and challenges to the field of materials science. Recently, this concept has been rapidly and widely extended to ceramics, polymers, composites, etc., which are forming a new emerging material system named high-entropy materials (HEMs). Numerous studies have shown that large degrees of freedom in composition design and process design have been found to provide more possibilities and turnability for HEMs to overcome the bottlenecks of conventional materials and realize a broad range of microstructure and properties for practical applications, such as aerospace, corrosion engineering, energy conversion and storage, catalysis, superconductivity and thermoelectricity, and so on. To date, HEMs are continuously expanding, and a large number of new materials with unique properties and functions are being developed and applied in the potential fields. The present Special Issue aims to collect insightful papers on the latest development of HEMs. The topics include but are not limited to material design, preparation methods, microstructure characterizations, mechanical behaviors, physical and chemical properties, and the structural and functional applications of HEMs.

Dr. Bin Liu
Guest Editor

Manuscript Submission Information

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Keywords

  • high-entropy alloys
  • high-entropy materials
  • entropy
  • composition design
  • preparation methods
  • microstructure
  • structures and properties
  • structural materials
  • functional applications

Published Papers (1 paper)

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Research

15 pages, 3529 KiB  
Article
Early Stages of Crack Nucleation Mechanism in Fe39Mn20Co20Cr15Si5Al1 High-Entropy Alloy during Stress Corrosion Cracking Phenomenon: Pit Initiation and Growth
by Pranshul Varshney and Nilesh Kumar
Crystals 2024, 14(8), 719; https://doi.org/10.3390/cryst14080719 (registering DOI) - 11 Aug 2024
Viewed by 213
Abstract
This study investigated the susceptible sites for pit nucleation in a transformation-induced plasticity (TRIP) Fe39Mn20Co20Cr15Si5Al1 (at.%) high-entropy alloy (HEA) in 3.5 wt.% NaCl solution. The investigation involved a constant-load stress corrosion cracking [...] Read more.
This study investigated the susceptible sites for pit nucleation in a transformation-induced plasticity (TRIP) Fe39Mn20Co20Cr15Si5Al1 (at.%) high-entropy alloy (HEA) in 3.5 wt.% NaCl solution. The investigation involved a constant-load stress corrosion cracking (SCC) experiment. The SCC testing was interrupted at different pre-determined time intervals to characterize the specimen surface using a scanning electron microscope (SEM), electron backscattered diffraction (EBSD), and a three-dimensional optical stereomicroscope. The EBSD results revealed pit nucleation at the susceptible γ–ε interphase and ε–ε interlath/plate boundaries. The three-dimensional profile and SEM results indicated an increase in pit depth with no change in pit diameter on the surface of the specimen as the experiment progressed over time. This study highlights the importance of microstructural features and mechanical loading in the corrosion behavior of TRIP HEAs, providing insights into the mechanisms of pit nucleation and growth under aggressive environmental conditions. Full article
(This article belongs to the Special Issue Preparation and Applications of High-Entropy Materials)
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