Structural aging and rejuvenation through magnetic annealing in Fe metallic glasses

IF 3.2 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of Non-crystalline Solids Pub Date : 2025-05-12 DOI:10.1016/j.jnoncrysol.2025.123608

Yanxue Wu , Feiqi Huang , Zhe Chen , Huashan Liu , Jing Zhou , Haibo Ke , Hailong Peng

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Abstract

We perform the coupled molecular dynamics and spin dynamics simulations to investigate the magnetic annealing effect on the mechanical properties of Fe metallic glasses (MGs). The MGs exhibit a brittle transition with the alternative magnetic annealing at room temperature, while a ductile transition at high temperature. Through local structural analysis, we identify two distinct effects of magnetic annealing: structural aging and structural rejuvenation. The structural aging is manifested as the increase of the icosahedral (ICO) orders, while the structural rejuvenation is featured by the ICO reduction and the increase of structural entropy. The regime of structural aging or rejuvenation coincides with the mechanical behavior at different temperatures. Intriguingly, we observe a clear structural anisotropy induced by the spin-lattice interaction in the quenched samples. The structural anisotropy can be notably relieved at high temperatures through magnetic annealing. These findings unveil the structural significance through which the mechanical properties of MGs can be tuned via magnetic annealing.

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铁金属玻璃的磁退火时效与回火

通过分子动力学和自旋动力学的耦合模拟，研究了磁退火对铁金属玻璃力学性能的影响。交替磁退火后，mg合金在室温下呈现脆性转变，而在高温下呈现延性转变。通过局部结构分析，我们确定了两种不同的磁退火效应：组织时效和组织年轻化。结构老化表现为二十面体（ICO）阶数的增加，而结构返老返老则表现为ICO的减少和结构熵的增加。在不同温度下，结构时效或回春的规律与力学行为一致。有趣的是，我们在淬火样品中观察到明显的自旋-晶格相互作用引起的结构各向异性。在高温下，通过磁退火可以明显减轻结构的各向异性。这些发现揭示了结构的重要性，通过磁性退火可以调谐mg的机械性能。

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

Journal of Non-crystalline Solids 工程技术-材料科学：硅酸盐

CiteScore

6.50

自引率

11.40%

发文量

576

审稿时长

35 days

期刊介绍： The Journal of Non-Crystalline Solids publishes review articles, research papers, and Letters to the Editor on amorphous and glassy materials, including inorganic, organic, polymeric, hybrid and metallic systems. Papers on partially glassy materials, such as glass-ceramics and glass-matrix composites, and papers involving the liquid state are also included in so far as the properties of the liquid are relevant for the formation of the solid. In all cases the papers must demonstrate both novelty and importance to the field, by way of significant advances in understanding or application of non-crystalline solids; in the case of Letters, a compelling case must also be made for expedited handling.