Serrated flow and stick-slip deformation dynamics in the presence of shear-band interactions for a Zr-based metallic glass

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Serrated flow and stick-slip deformation dynamics in the presence of shear-band interactions for a Zr-based metallic glass
	Sun, BA ; Pauly, S ; Tan, J ; Stoica, M ; Wang, WH ; Kuhn, U ; Eckert, J
刊名	ACTA MATERIALIA
	2012
卷号	60 期号:10 页码:4160
关键词	STATE-DEPENDENT FRICTION FREEDOM ELASTIC SYSTEM AMORPHOUS-ALLOYS PLASTIC-FLOW MECHANICAL-BEHAVIOR INHOMOGENEOUS FLOW SINGLE DEGREE COMPRESSION TEMPERATURE INSTABILITY
ISSN号	1359-6454
通讯作者	Sun, BA (reprint author), IFW Dresden, Inst Komplexe Mat, Helmholtzstr 20, D-01069 Dresden, Germany.
中文摘要	In this paper, shear-band interactions (SBIs) were introduced by a simple method and their effect on the dynamics of shear bands and serrated flow was studied for a Zr-based metallic glass. Statistical analysis on serrations shows that the stick-slip dynamics of interacting shear bands is a complex, scale-free process, in which shear bands are highly correlated. Both the stress drop magnitude and the incubation time for serrations follow a power-law distribution, presenting a sharp contrast to the randomly generated, uncorrelated serrated flow events in the absence of SBIs. Observations on the fracture morphologies provide further evidence and insights into the deformation dynamics dominated by SBIs. A stick-slip model for multiple shear bands with interactions is also proposed and numerically calculated. The results, in good agreement with the experimental results, quantitatively show how multiple shear bands operate and correlate, especially for those with large serrated flow events. Our studies suggest that one serration in the stress-strain curve may correspond to collective stick-slip motions of multiple shear bands for those ductile bulk metallic glasses where a large number of shear bands are observed during deformation. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
收录类别	SCI
资助信息	German Science Foundation under the Leibniz Program [EC 111/26-1]; NSF of China [50921091]; MOST 973 of China [2010CB731603]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52493]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Sun, BA,Pauly, S,Tan, J,et al. Serrated flow and stick-slip deformation dynamics in the presence of shear-band interactions for a Zr-based metallic glass[J]. ACTA MATERIALIA,2012,60(10):4160.
APA	Sun, BA.,Pauly, S.,Tan, J.,Stoica, M.,Wang, WH.,...&Eckert, J.(2012).Serrated flow and stick-slip deformation dynamics in the presence of shear-band interactions for a Zr-based metallic glass.ACTA MATERIALIA,60(10),4160.
MLA	Sun, BA,et al."Serrated flow and stick-slip deformation dynamics in the presence of shear-band interactions for a Zr-based metallic glass".ACTA MATERIALIA 60.10(2012):4160.