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

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Title:	The study of loading rate effect of a Cu-based bulk metallic glass during nanoindentation
Authors:	Chen,KW;Jian,SR;Wei,PJ;Jang,JSC;Lin,JF
Contributors:	材料科學與工程研究所
Keywords:	SHEAR-BAND FORMATION;MECHANICAL-PROPERTIES;PLASTIC-DEFORMATION;SERRATED FLOW;INDENTATION;ALLOYS
Date:	2010
Issue Date:	2012-03-27 16:28:40 (UTC+8)
Publisher:	國立中央大學
Abstract:	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.
Relation:	JOURNAL OF ALLOYS AND COMPOUNDS
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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