化学短程有序对Fe40Mn20Cr20Ni20高熵合金微观屈服变形的影响

doi:10.13251/j.issn.0254-6051.2026.02.007

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 46-52.DOI: 10.13251/j.issn.0254-6051.2026.02.007

化学短程有序对Fe₄₀Mn₂₀Cr₂₀Ni₂₀高熵合金微观屈服变形的影响

龙燕, 张倩, 兰爱东, 乔珺威

太原理工大学材料科学与工程学院, 山西太原 030024

收稿日期:2025-10-29 修回日期:2026-01-06 发布日期:2026-03-05
通讯作者: 乔珺威,教授,博士生导师,E-mail:qiaojunwei@gmail.com
作者简介:龙燕(1998—),女,硕士研究生,主要研究方向为高熵合金的纳米力学性能,E-mail:longyan-8@hotmail.com。
基金资助:
国家自然科学基金(52271110);山西省自然科学基金(202203021221083,202403011212001)

Effect of chemical short-range order on micro-yield deformation of Fe₄₀Mn₂₀Cr₂₀Ni₂₀ high-entropy alloy

Long Yan, Zhang Qian, Lan Aidong, Qiao Junwei

College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Received:2025-10-29 Revised:2026-01-06 Published:2026-03-05

摘要/Abstract

摘要： 利用分子动力学和蒙特卡罗混合模拟,与纳米压痕试验结合,研究了化学短程有序结构对Fe₄₀Mn₂₀Cr₂₀Ni₂₀高熵合金微观屈服的强化作用,及其对位错形核机制的影响,以提供化学短程有序结构导致合金微观屈服临界载荷升高的可视化证据。结果表明,化学有序度增强会通过抑制位错形核提高合金的微观屈服强度。化学有序畴界会在原子尺度上促进均匀形核,但化学短程有序结构自身又会抑制均匀形核,导致分子动力学模拟的Fe₄₀Mn₂₀Cr₂₀Ni₂₀高熵合金微观屈服载荷呈双峰分布。

关键词: 高熵合金, 化学短程有序, 分子动力学, 纳米压痕, 位错形核机制

Abstract: Using molecular dynamics and Monte Carlo hybrid simulation, combined with nanoindentation test, the strengthening effect of chemical short-range ordered structure on the micro-yield of Fe₄₀Mn₂₀Cr₂₀Ni₂₀ high-entropy alloy and its effect on the dislocation nucleation mechanism were investigated, so as to provide visual evidence that the chemical short-range ordered structure leads to the increase of the critical load of micro-yield of the alloy. The results show that the enhancement of chemical order can improve the micro-yield strength of the alloy by inhibiting dislocation nucleation. The chemical ordered domain boundary will promote the homogeneous nucleation at the atomic scale, but the chemical short-range ordered structure itself will inhibit the homogeneous nucleation, resulting in the bimodal distribution of the microscopic yield load of Fe₄₀Mn₂₀Cr₂₀Ni₂₀ high-entropy alloy simulated by molecular dynamics.

Key words: high-entropy alloy, chemical short-range order, molecular dynamics, nanoindentation, dislocation nucleation mechanism

中图分类号:

TG139

龙燕, 张倩, 兰爱东, 乔珺威. 化学短程有序对Fe₄₀Mn₂₀Cr₂₀Ni₂₀高熵合金微观屈服变形的影响[J]. 金属热处理, 2026, 51(2): 46-52.

Long Yan, Zhang Qian, Lan Aidong, Qiao Junwei. Effect of chemical short-range order on micro-yield deformation of Fe₄₀Mn₂₀Cr₂₀Ni₂₀ high-entropy alloy[J]. Heat Treatment of Metals, 2026, 51(2): 46-52.

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化学短程有序对Fe₄₀Mn₂₀Cr₂₀Ni₂₀高熵合金微观屈服变形的影响

Effect of chemical short-range order on micro-yield deformation of Fe₄₀Mn₂₀Cr₂₀Ni₂₀ high-entropy alloy

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