Stress-induced mechanical heterogeneity in metallic glasses revealed by spatial nano-indentation

被引：3

作者：

Cui, P. ^{[1
]}

Fan, J. T. ^{[1
]}

Zhang, L. J. ^{[1
]}

Yu, P. F. ^{[1
]}

Liaw, P. K. ^{[2
]}

Liu, R. P. ^{[1
]}

Li, G. ^{[1
,2
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2017年 / 471卷

基金：

美国国家科学基金会;

关键词：

MGs; Pressure-induced; Nanoindentation; Mechanical heterogeneity; DEFORMATION; DYNAMICS; STRENGTH; BEHAVIOR; ALLOYS; VOLUME; ZONES;

D O I：

10.1016/j.jnoncrysol.2017.05.024

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The heterogeneity plays a key role in physical and mechanical properties of a material. The nature of lacking long-range order in metallic glasses (MGs) causes the local atomic rearrangement to vary significantly in space when compressed. Different configurations of an ensemble of atoms in a MG lead, therefore, to a distribution of nanohardness, which also changes in space. The effects of pressure on the mechanical heterogeneity of MGs induced by a stress have been investigated by spatial nanoindentation. The mechanical heterogeneity is quantified by calculating shear-transformation zone volumes. Here, we demonstrate that the spatial nanohardness experimentally reveals very well on pressure-induced local mechanical heterogeneity in MGs.

引用

页码：91 / 94

页数：4

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