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Optimization of glass-forming ability and synergistic enhancement of strength plasticity in Cu50Zr46Al4 metallic glasses through Ag additions |
| Dongmei Li(李冬梅)1, Zhongyi Zhang(张忠一)1, Bolin Shang(尚博林)1, Rui Feng(丰睿)1, Xuefeng Li(李雪枫)2,†, and Peng Yu(余鹏)1,‡ |
1 College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 401331, China;
2 Chongqing Key Laboratory of Public Big Data Security Technology, Chongqing College of Mobile Communication, Qijiang 401420, China |
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Abstract Bulk metallic glasses (BMGs) are typically characterized by high strength and elasticity. However, they generally demonstrate a deficiency in plastic deformation capability at room temperatures. In this work, Cu$_{50-x}$Zr$_{46}$Al$_{4}$Ag$_{x}$ ($x=0$, 1, 2, 3, 4) alloys were prepared by arc melting and copper mold casting to investigate their structure, glass-forming ability, and mechanical properties. The results show that the addition of Ag can increase the parameter of $\Delta T_{x}$ and $\gamma $ in Cu$_{50}$Zr$_{46}$Al$_{4}$ alloy by 116% and 1.5% respectively, effectively enhancing its thermal stability and glass-forming ability. Compressive fracture tests reveal that the addition of Ag can significantly improve the yield strength, ultimate strength, and plasticity of the Cu$_{50}$Zr$_{46}$Al$_{4}$ alloy. Specifically, with the Ag addition of 1 at.%, the alloy's ultimate strength and plasticity increased by 71.8% and 21 times, respectively. Furthermore, the introduction of Ag can effectively control the free volume content in the Cu$_{50}$Zr$_{46}$Al$_{4}$ alloy, thereby tuning the hardness of the material. This work provides valuable insights into improving the mechanical performance of BMGs through micro-alloying approaches.
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Received: 24 March 2025
Revised: 15 April 2025
Accepted manuscript online: 21 April 2025
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PACS:
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61.25.Mv
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(Liquid metals and alloys)
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61.43.Dq
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(Amorphous semiconductors, metals, and alloys)
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62.20.F-
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(Deformation and plasticity)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12404228 and 52371148) and the Science and Technology Research Program of Chongqing Education Commission of China (Grant No. KJQN202200510). |
Corresponding Authors:
Xuefeng Li, Peng Yu
E-mail: 15584202964@163.com;pengyu@cqnu.edu.cn
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Cite this article:
Dongmei Li(李冬梅), Zhongyi Zhang(张忠一), Bolin Shang(尚博林), Rui Feng(丰睿), Xuefeng Li(李雪枫), and Peng Yu(余鹏) Optimization of glass-forming ability and synergistic enhancement of strength plasticity in Cu50Zr46Al4 metallic glasses through Ag additions 2025 Chin. Phys. B 34 086107
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