由 3d 过渡金属元素组成的 fcc 高/中熵合金中 Cr 引起的局部结构紊乱

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2024-11-11 DOI:10.1063/5.0231343

D. Furuya, M. Oda, Z. Chen, L. Li, H. Murakawa, H. Sakai, H. Nitani, Y. Niwa, H. Abe, H. Uetsuka, T. Karube, H. Inui, N. Hanasaki

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引用次数: 0

摘要

高/中熵合金（H/MEAs）因其优异的机械性能而备受关注。根据第一原理计算，原子从其晶格点的位移与元素有关，并与 H/MEAs 的屈服强度相关。为了通过实验研究局部结构的元素依赖性，我们测量了七种由 3d 过渡金属元素组成的面心立方 H/MEAs 的扩展 X 射线吸收精细结构。我们的实验结果表明，铬（Cr）周围的局部无序度大于其他元素周围的无序度，这是所有测量到的 fcc H/MEAs 的共同特征，这与之前理论研究表明铬的位移大于其他元素的结论一致。我们讨论了组成元素铬引起局部结构紊乱的内在机制。

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Local structural disorder introduced by Cr in fcc high-/medium-entropy alloys consisting of 3d transition metal elements

High-/medium-entropy alloys (H/MEAs) have attracted attention for their excellent mechanical properties. According to first-principles calculations, the atomic displacements from their lattice points are element-dependent and correlated with the yield strength of H/MEAs. To investigate experimentally the element dependence of the local structure, we measured the extended x-ray absorption fine structure in seven kinds of face-centered cubic H/MEAs consisting of 3d transition metal elements. Our experimental results indicate that the local disorder around chromium (Cr) is larger than that around other elements, which is a common feature in all the measured fcc H/MEAs, aligning with prior theoretical studies indicating larger displacements of Cr in comparison to other elements. We discuss the mechanism underlying the local structural disorder induced by the constituent element Cr.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.