Effect of chemical short-range order on the dislocation behavior of a multi-principal element alloy single crystal under shock loading

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-09-17 DOI:10.1016/j.matchar.2025.115570

Shipan Yin , Fan Zhang , Zezhou Li , Qinghui Tang , Zigao Zhang , Jingyao He , Zeyu Meng , Xingwang Cheng

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Abstract

The CrCoNi single crystal, as a prototypical multi-principal element alloy (MPEA), with different degrees of chemical short-range order (CSRO) was employed to probe the effect of CSRO on the dislocation behavior of the MPEA under shock loading. As shock loading is along the [111] of single crystal, partial dislocations and corresponding stacking faults (SFs) are responsible for the microstructural response. As the marked increase of CSRO, the local misorientation and geometrically necessary dislocations in the deformed microstructure decreased slightly. By analyzing the strain field of SFs at the atomic scale, we further quantitatively determined the SF width. The average width of the SFs does not show substantial difference in the CrCoNi with different degree of CSRO considering the standard deviation. Our findings demonstrate that deformation behavior is negligibly dependent on CSRO in MPEAs under extreme loading conditions.

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冲击载荷下化学短程顺序对多主元素合金单晶位错行为的影响

采用具有不同程度化学短程有序（CSRO）的CrCoNi单晶作为一种典型的多主元素合金（MPEA），探讨了CSRO对冲击载荷下MPEA位错行为的影响。由于冲击载荷沿单晶方向[111]，局部位错和相应的层错（SFs）是导致微观结构响应的原因。随着CSRO的显著增加，变形组织中的局部取向错误和几何上必要的位错略有减少。通过在原子尺度上分析SF的应变场，进一步定量确定了SF的宽度。考虑到标准差，不同CSRO程度的CrCoNi中，SFs的平均宽度没有显著差异。我们的研究结果表明，在极端载荷条件下，mpea的变形行为对CSRO的依赖可以忽略不计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.