The effect of free volume on the deformation behaviour of a Zr-based metallic glass under nanoindentation
The effect of free volume on the deformation behaviour of a Zr-based metallic glass under nanoindentation
复制标题
DOI：
10.1088/0022-3727/40/19/043
复制
发表时间：
2007-10-07
影响因子：
3.4
通讯作者：
Chan, K. C.
中科院分区：
文献类型：
--
作者：
Li, N.;Liu, L.;Chan, K. C.
本文采用纳米压痕和微米压痕技术研究了具有不同自由体积的Zr 65 Cu 17.5 Ni 10 Al 7.5非晶合金的变形行为。研究发现，金属玻璃的塑性流动与自由体积的大小密切相关。具有更多自由体积的金属玻璃在纳米压痕过程中表现出更明显的锯齿，具有更大的弹出尺寸，并且在微压痕过程中表现出更明显的剪切带。根据自由体积理论讨论了自由体积对Zr基非晶合金变形行为的影响。
In this paper, the deformation behaviour of Zr65Cu17.5Ni10Al7.5 metallic glasses with different amounts of free volume was investigated with nano- and micro-indentation. It was found that the plastic flow of the metallic glasses is closely related to the amount of free volume. The metallic glasses with more free volume exhibit more conspicuous serrations with a larger pop-in size during nanoindentation and more pronounced shear bands during micro- indentation. The effect of free volume on the deformation behaviour of the Zr-based metallic glasses is discussed in terms of free volume theory.