文章信息/Info

Title:

Compositional Heterogeneity and Its Effects in High-Entropy Alloy

文章編號:

1674-3962(2025)02-0169-08

作者:

符曉倩; 余倩

1. 浙江大學材料科學與工程學院 硅材料國家重點實驗室 電子顯微鏡中心，浙江 杭州 310027 2. 海南大學精密儀器高等研究中心 海洋材料表征技術創新研究院 皮米電鏡中心，海南 海口 570228

Author(s):

FU Xiaoqian;  YU Qian

1.Center of Electron Microscopy, State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China 2.Pico Electron Microscopy Center, Innovation Institute for Ocean Materials Characterization Technology, Center for Advanced Studies on Precision Instruments, Hainan University, Haikou 570228, China

關鍵詞:

高熵合金; 成分非均勻性; 化學短程有序; 元素濃度波動; 位錯行為; 力學性能

Keywords:

high-entropy alloys;  compositional heterogeneity;  chemical short-range ordering;  concentration variation;  dislocations behavior;  mechanical property

分類號:

TG131

DOI:

10.7502/j.issn.1674-3962.202207036

文獻標志碼:

A

摘要:

高熵合金因其獨特的結構特征和優異的力學性能受到了研究人員的廣泛關注。最初，高熵合金被認為是理想的固溶體，具有完全隨機混亂的元素分布。而近期越來越多的研究表明，高熵合金中廣泛存在元素分布的非均勻性，包括局域的化學短程有序和元素濃度波動，這里統稱為成分非均勻性。了解高熵合金中成分非均勻性的結構細節及其對于力學行為的作用至關重要。近五年，不少工作對此進行了探究。簡要綜述了國內外關于高熵合金中成分非均勻性的研究，基于其對位錯滑移的影響總結了相關材料強化機制，并展望了高熵合金中成分非均勻性的未來研究趨勢。

Abstract:

High-entropy alloys have attracted much attention in recent years because of their unique structural characteristics and excellent mechanical properties.Originally, high-entropy alloys were considered to be ideal solid solutions with completely random element distributions. While recently, more and more studies have shown that inhomogeneity of element distribution exists widely in high-entropy alloys, including local chemical short-range ordering and element concentration fluctuations, which are collectively referred to as compositional heterogeneity here. It is of vital importance to understand the fine structure of compositional heterogeneity and its role in tuning mechanical behaviors of high-entropy alloys. In recent five years, lots of work probe into the mystery. In this paper, we briefly review the research on compositional heterogeneity in high-entropy alloys and its influence on the strengthening mechanisms and mechanical properties, and further prospect the future research in the relevant field.