Composition dependence of mechanically–induced structural rejuvenation in Cu–Zr–based metallic glass: A molecular dynamics study

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

Journal of Non-crystalline Solids Pub Date : 2024-12-10 DOI:10.1016/j.jnoncrysol.2024.123360

Chupeng Xie, Pingjun Tao, Wei Zhang, Jiajie Hu, Shunxing Liang, Weitong Cai, Yuanzheng Yang

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引用次数: 0

Abstract

This paper employs MD method to simulate cyclic loading within elastic limit of Cu_xZr_100-x (x = 43, 50, 57, 64) metallic glass (MG) samples. The results indicate that cyclic loading can induce rejuvenation of all MG samples, and the degree of rejuvenation decreases with the increase in Cu content. Cyclic loading can not only increase the number and connectivity of icosahedral constituent atoms in all MG samples but also induce softening of all MG samples. The expected value of the softening degree of the Cu₅₀Zr₅₀ MG sample is lower than the change trend of the rejuvenation degree. The reason is that MG samples with equiatomic ratio characteristics have a stronger ability to form highly connected icosahedral clusters. The softening degree of metallic glass samples induced by cyclic loading is jointly determined by the degree of rejuvenation and the degree of change in icosahedral structure.

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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.