Effect of Annealing on Strain Rate Sensitivity of Metallic Glass under Nanoindentation

被引：6

作者：

Li, Mingcan ^{[1
]}

机构：

[1] Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China

来源：

METALS | 2020年 / 10卷 / 08期

关键词：

bulk metallic glass; annealing; nanoindentation; hardness; strain rate; TRANSFORMATION ZONE SIZE; SERRATED FLOW; PLASTIC-FLOW; FREE-VOLUME; STRESS OVERSHOOT; ORIGIN; RELAXATION; STRENGTH; HARDNESS;

D O I：

10.3390/met10081063

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of isothermal annealing on the strain rate sensitivity (SRS) of a Zr-based bulk metallic glass (BMG) was investigated by nanoindentation. A more positive SRS is observed with a decrease in the content of the free volume (FV) of the sample. Furthermore, the SRS becomes nearly constant with increasing annealing time when the FV is annealed out. By taking into consideration the FV-assisted activation and combination of the shear transformation zones (STZs), the underlying mechanism is well understood. The current work may offer useful insights into the correlation between the microstructure and mechanical properties of BMGs.

引用

页码：1 / 10

页数：10

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