Strain hardening and recovery in a bulk metallic glass under nanoindentation

被引：59

作者：

Yang, B

Riester, L

Nieh, TG ^{[1
]}

机构：

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

[2] Oak Ridge Natl Lab, Met & Ceram Div, Oak Ridge, TN 37831 USA

来源：

SCRIPTA MATERIALIA | 2006年 / 54卷 / 07期

关键词：

metallic glasses; nano indentation; strain hardening; yield phenomenon; shear bands;

D O I：

10.1016/j.scriptamat.2005.12.049

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hardening and recovery phenomena, which have not been recognized in amorphous materials at room temperature before, were observed in a bulk metallic glass (BMG) using an instrumented nanoindentation. From designed cyclic experiments, we observed the hardness of the BMG increased each time when the sample was reloaded immediately after unloading and then gradually reduced to a stable value before the next unloading. This phenomenon was explained using a free-volume model for amorphous structure. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1277 / 1280

页数：4

共 19 条

[1] DEVELOPMENT OF VISCO-PLASTIC DEFORMATION IN METALLIC GLASSES [J].