Deformation Behavior and Mechanical Properties of High Entropy Alloys (2nd Edition)

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

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 1534

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Guest Editor
The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, China
Interests: fatigue properties of metallic materials; fatigue cracking behavior of grain boundaries and twin boundaries; high-entropy alloys; grain boundary segregation; size effect of material deformation
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Special Issue Information

Dear Colleagues,

As a new type of metallic material, high-entropy alloys (HEAs) usually exhibit excellent mechanical properties; thus, they have received much attention in materials science and engineering. Furthermore, because there are more metastable states of HEAs than traditional alloys during processing, corresponding mechanical properties can be obtained under different external conditions.

This Special Issue of Metals will focus on the microstructure, deformation behaviors, and mechanical properties of high-entropy alloys under different conditions, including but not limited to: dislocation slip and twinning, grain boundary segregation, precipitation and phase transformation, low-temperature/high-temperature deformation, corrosion, wear, fatigue, etc., as well as various methods for strengthening and toughening. The scope will cover fundamental research and all other aspects of alloy preparation, heat treatment, computer simulation, and engineering applications.

We are pleased to invite you to submit manuscripts to this Special Issue and share research results.

Prof. Dr. Linlin Li
Guest Editor

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Keywords

  • high-entropy alloys (HEAs)
  • processing
  • microstructure
  • deformation
  • mechanical properties

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Published Papers (1 paper)

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Research

14 pages, 2198 KiB  
Article
Effects of Chemical Short-Range Order and Lattice Distortion on Crack-Tip Behavior of Medium-Entropy Alloy by Atomistic Simulations
by Xiuju Zhu, Fuhua Cao, Lanhong Dai and Yan Chen
Metals 2024, 14(2), 226; https://doi.org/10.3390/met14020226 - 13 Feb 2024
Cited by 1 | Viewed by 1272
Abstract
It is well demonstrated that the complex chemical fluctuations on high/medium-entropy alloys (H/MEAs) play critical roles in their deformation process, but there are few reports related to the effect of such complex chemical fluctuations on the crack behavior. In this paper, the effects [...] Read more.
It is well demonstrated that the complex chemical fluctuations on high/medium-entropy alloys (H/MEAs) play critical roles in their deformation process, but there are few reports related to the effect of such complex chemical fluctuations on the crack behavior. In this paper, the effects of chemical short-range order (CSRO) and lattice distortion (LD) on the crack-tip behavior of CrCoNi MEAs under mode I loading at room temperature are investigated by carrying out molecular dynamics (MD) simulation, hybrid MD/Monte-Carlo (MC) simulation and the J-integral method. The results reveal that CSRO can improve the J-integral value without significant changes in the localized deformation zone size. On the contrary, LD can lower the J-integral value with an increase in the localized deformation zone size. The energetic analysis shows that CSRO improves the activation energy barrier of Shockley partial dislocation from the crack-tip while LD reduces the activation energy barrier. Our work is a step forward in understanding the effects of CSRO and LD on the crack-tip behavior and deformation mechanisms of CrCoNi MEAs. Full article
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