Study of nanoindentation behavior of amorphous alloy using molecular dynamics

被引：146

作者：

Qiu, Chen ^{[1
]}

Zhu, Pengzhe ^{[1
]}

Fang, Fengzhou ^{[1
]}

Yuan, Dandan ^{[1
]}

Shen, Xuecen ^{[1
]}

机构：

[1] Tianjin Univ, Ctr MicroNano Mfg Technol, State Key Lab Precis Measuring Technol & Instrume, Tianjin 300072, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2014年 / 305卷

基金：

中国国家自然科学基金;

关键词：

Amorphous alloy; Nanoindentation; Molecular dynamics; BULK METALLIC-GLASS; ANNEALING-INDUCED AMORPHIZATION; ELASTIC-MODULUS; SHEAR BANDS; SIMULATIONS; INDENTATION; TRANSITION; SILICON; SIZE; TRANSFORMATION;

D O I：

10.1016/j.apsusc.2014.02.179

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：

Molecular dynamics is employed to study the nanoindentation process of Cu50Zr50 amorphous alloy. Deformation behavior of the substrate during indentation process is studied. The effects of indentation depth, loading speed, indenter radius, temperature and adhesion interaction on nanoindentation process are thoroughly investigated. It is found that shear transformation zones constantly migrate and grow during the indentation process. There is no obvious pile-up during indentation process for the indentation depth studied. A bigger indentation depth, loading speed and indenter radius result in a larger load. The indenter radius has no significant effect on the material properties, while a larger loading speed leads to the increase of the material's hardness and elastic modulus. The temperature greatly affects the material's properties. With the increase of temperature, the load and hardness decrease whereas the elastic modulus tends to go up. The hardness is slightly larger when considering the adhesion interaction between indenter and substrate, while the elastic modulus is not significantly affected. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：101 / 110

页数：10

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