Glass-Forming Ability, Mechanical Properties, and Energetic Characteristics of ZrCuNiAlNbHfY Bulk Metallic Glasses

被引:1
作者
Yu, Xin [1 ]
Li, Jianbin [1 ]
Zhang, Kaichuang [1 ]
Zhang, Huijie [2 ]
Wang, Hao [1 ]
Fang, Yuanhang [3 ]
Ma, Yusong [1 ]
Wang, Zhenxiong [1 ]
Zhang, Xinggao [1 ]
Gai, Xiqiang [1 ]
机构
[1] Acad Mil Sci, Chem Def Inst, Beijing 102205, Peoples R China
[2] Northwest Univ, Sch Chem Engn, Xian Key Lab Special Energy Mat, Xian 710069, Peoples R China
[3] North Univ China, Sch Electromech Engn, Taiyuan 030051, Peoples R China
关键词
Zr-based bulk metallic glasses; glass-forming ability; mechanical properties; energetic characteristics; DYNAMIC DEFORMATION-BEHAVIOR; ENHANCED PLASTICITY; SUPERCOOLED LIQUID; THERMAL-STABILITY; AMORPHOUS ALLOY; AL; TI; FRAGMENTATION;
D O I
10.3390/ma17133136
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effects of partially substituting Al for Cu in Zr59.62Cu18.4-xNi12Al6+xNb3Hf0.78Y0.2 (x = 0, 2, 4, 6, 8 at.%) bulk metallic glasses (BMGs) on their glass-forming ability (GFA), quasi-static and dynamic mechanical properties, and energy characteristics were investigated. The results showed that an appropriate substitution of Al for Cu can improve GFA and reach a critical casting size up to 10 mm. Additionally, with Al replacement of Cu, the change in the distribution and content of free volume inside the BMGs was the main reason for the quasi-static compression plasticity. In contrast, the BMGs exhibited no plasticity during dynamic compression and high-speed impact, owing to the short loading time and thermal softening effect. In terms of energy characteristics, all alloys have a high combustion enthalpy. And on the surface of the fragments collected from impact, the active elements Zr, Al, and Nb reacted because of the adiabatic temperature rise. Further, x = 4 at.% Zr-based BMG with its superior overall performance could penetrate a 6 mm Q235 plate at a speed of 1038 m/s, combining excellent mechanical properties and energy characteristics. This study contributes to the development of Zr-based BMGs as novel energetic structural materials.
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页数:14
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