Improving the plasticity of transition-metal-based high-entropy bulk metallic glasses via Ag-induced phase separation

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-04-02 DOI:10.1016/j.msea.2025.148281

Xueru Fan , Lei Xie , Qiang Li , Chuntao Chang

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引用次数: 0

Abstract

High-entropy bulk metallic glasses (HE-BMGs) exhibit unique combinations of mechanical and magnetic properties due to their complex compositions. This study investigates the effects of minor Ag additions on the glass-forming ability (GFA), thermal stability, and mechanical behavior of [Fe_0.25Co_0.25Ni_0.25(Si_0.3B_0.7)_0.25]_100-xAg_x (x = 0, 0.1, 0.3, 0.5 at.%) HE-BMGs. Results indicate that Ag promotes phase separation, introducing nanoscale heterogeneity, which enhances plasticity and mechanical performance. Optimal Ag content (0.3 at.%) achieved an 15.7 % plastic strain and 3875 MPa yield strength, attributed to the formation of short-range ordered structures and shear transformation zones. These nanoscale heterogeneities acted as pinning sites, facilitating shear-band branching and stable deformation. Excessive Ag content, however, induced brittle phase formation and structural stress, reducing plasticity. Furthermore, the saturation magnetization peaked at 0.84 T with minimal degradation of GFA. These findings highlight the potential of controlled phase separation in designing HE-BMGs with superior strength-ductility synergy for advanced structural applications.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.