Deformation behavior of the Zr41.2Ti13.8CU12.5Ni10Be22.5 bulk metallic glass over a wide range of strain-rates and temperatures
Deformation behavior of the Zr41.2Ti13.8CU12.5Ni10Be22.5 bulk metallic glass over a wide range of strain-rates and temperatures
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DOI：
10.1016/s1359-6454(03)00164-2
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发表时间：
2003-07-16
期刊：
影响因子：
9.4
通讯作者：
Johnson, WL
中科院分区：
文献类型：
--
作者：
Lu, J;Ravichandran, G;Johnson, WL
采用准静态和动态Kolsky（splitHopkinson）压杆加载系统，建立了Zr41.2Ti13.8Cu12.5Ni10Be22.5块体非晶合金（Vitreloy 1）在较宽温度范围（室温至过冷液相区）和应变速率范围（10（-5）至10（3）s（-1））下的单轴压缩应力-应变关系。进行了应变速率实验中的松弛和跳跃，以进一步了解Vitreloy 1的时间依赖性行为。该材料在其玻璃化转变温度（623 K）以上表现出超塑性流动，应变速率高达1 s（-1）。在均匀变形制度的粘度被发现显着降低与应变速率的增加。采用虚拟应力模型描述了高温下Vitreloy I合金在恒应变率加载和多应变率加载下的基本变形特征。(C)2003 Acta Materialia Inc.由爱思唯尔科技有限公司出版。保留所有权利。
The stress-strain relations for the Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass (Vitreloy 1) over a broad range of temperatures (room temperature to its supercooled liquid region) and strain rates (10(-5) to 10(3) s(-1)) were established in uniaxial compression using both quasi-static and dynamic Kolsky (split Hopkinson) pressure bar loading systems. Relaxation and jump in strain rate experiments were conducted to further understand the time dependent behavior of Vitreloy 1. The material exhibited superplastic flow above its glass transition temperature (623 K) and strain rates of up to 1 s(-1). The viscosity in the homogeneous deformation regime was found to decrease dramatically with increasing strain rate. A fictive stress model was used to describe the basic deformation features of Vitreloy I under constant strain-rate loading as well as multiple strain-rate loading at high temperatures. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.