Al-Cu-Mg-Ag合金中片状Ω纳米沉淀的滑移传递

IF 5.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Scripta Materialia Pub Date : 2025-04-01 Epub Date: 2025-01-13 DOI:10.1016/j.scriptamat.2025.116539

Wenqian Wu , Shenlan Yang , Jian-Feng Nie , Amit Misra , Jian Wang

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引用次数: 0

摘要

采用原子模拟、晶体学分析和实验HAADF-STEM图像阐明了Al-Cu-Mg-Ag合金中Ω相（Al2Cu）纳米板剪切的位错机制。通过Ω相的滑移传递被发现与¼[1¯01]（101）Ω滑移系统有关，因为与其他滑移系统相比，该滑移系统具有更高的几何相容系数和更低的残余位错幅度。该研究强调了纳米板的尺寸、形状和几何形状对位错运动的阻碍作用以及与滑移传递相关的塑性共变形能力的作用。

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Slip transmission across plate-shaped Ω nano-precipitates in Al-Cu-Mg-Ag alloys

Atomistic simulations, crystallographic analysis and experimental HAADF-STEM images were used to elucidate the dislocation mechanisms of shearing Ω phase (Al₂Cu) nano-plates in Al-Cu-Mg-Ag alloys. Slip transmission across the Ω phase was found to be associated with the ¼

[\bar{1} 01] {(101)}_{Ω}

slip system because of a higher geometric compatibility factor and a lower residual dislocation magnitude associated with this slip system as compared to others. This study highlights the role of nano-plate size, shape and geometry on the impeding effect on dislocation motion and the plastic co-deformation capability associated with slip transmission.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.