The study of loading rate effect of a Cu-based bulk metallic glass during nanoindentation

被引：10

作者：

Chen, K. W. ^{[1
]}

Jian, S. R. ^{[2
]}

Wei, P. J. ^{[3
]}

Jang, J. S. C. ^{[4
]}

Lin, J. F. ^{[1
,5
]}

机构：

[1] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 701, Taiwan

[2] I Shou Univ, Dept Mat Sci & Engn, Kaohsiung 840, Taiwan

[3] Natl Cheng Kung Univ, Inst Nanotechnol & Microsyst Engn, Tainan 701, Taiwan

[4] Natl Cent Univ, Inst Mat Sci & Engn, Dept Mech Engn, Chungli 320, Taiwan

[5] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 701, Taiwan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷

关键词：

Metals; Amorphous materials; Scanning and transmission electron microscopy; SHEAR-BAND FORMATION; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; SERRATED FLOW; INDENTATION; ALLOYS;

D O I：

10.1016/j.jallcom.2010.03.207

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：

In this study, the nanoindentation behavior of a Cu-Zr-Al-Ag bulk metallic glass was investigated at various loading rates. It is found that the load-displacement curve of indentation exhibits a significant serration of displacement jumps (pop-ins). The experiment data show that the depths of the pop-in site are a geometric series. The size of pop-ins increases with indentation depth but decreases with loading rate; a larger applied loading rate leads to smaller pop-ins during the indentation process. However, the experimental results indicate that the loading rate has no influence on the depth ratio of pop-in sites. FIB observation and TEM diffraction patterns show that the microstructure of the BMG material remained amorphous irrespective of the presence shear bands. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S69 / S73

页数：5

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