How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?

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	How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?
	Huang X(黄鑫); Ling Z(凌中); Zhang HS(张虎生); Ma J; Dai LH(戴兰宏)
刊名	Journal of Applied Physics
	2011
通讯作者邮箱	lhdai@lnm.imech.ac.cn
卷号	110 期号:10 页码:103519
关键词	Metallic-Glass Deformation Fracture Failure Solids Model Flow Transformation Localization Compression
ISSN号	0021-8979
通讯作者	Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
产权排序	[Huang, X; Ling, Z; Zhang, HS; Dai, LH] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Ma, J] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore; [Ma, J] Nanyang Technol Univ, Temasek Labs, Singapore 637553, Singapore
合作状况	国际
中文摘要	Specially designed plate-impact experiments have been conducted on a Zr-based amorphous alloy using a single-stage light gas gun. To understand the microdamage nucleation process in the material, the samples are subjected to dynamic tensile loadings of identical amplitude (similar to 3.18 GPa) but with different durations (83-201 ns). A cellular pattern with an equiaxed shape is observed on the spallation surface, which shows that spallation in the tested amorphous alloy is a typical ductile fracture and that microvoids have been nucleated during the process. Based on the observed fracture morphologies of the spallation surface and free-volume theory, we propose a microvoid nucleation model of bulk amorphous alloys. It is found that nucleation of microvoids at the early stage of spallation in amorphous alloys results from diffusion and coalescence of free volume, and that high mean tensile stress plays a dominant role in microvoid nucleation. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3663332]
学科主题	Physics
分类号	二类/Q2
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	METALLIC-GLASS ; DEFORMATION ; FRACTURE ; FAILURE ; SOLIDS ; MODEL ; FLOW ; TRANSFORMATION ; LOCALIZATION ; COMPRESSION
收录类别	SCI ; EI
资助信息	Financial support was from the NSFC (Grant Nos. 10872206, 10721202, 10725211, and 11132011), the National Natural Science Foundation of China-NSAF. Grant No: 10976100, and the National Basic Research Program of China (Grant No. 2009CB724401).
原文出处	http://dx.doi.org/10.1063/1.3663332
语种	英语
WOS记录号	WOS:000297943700054
公开日期	2012-04-01
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/44894]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Huang X,Ling Z,Zhang HS,et al. How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?[J]. Journal of Applied Physics,2011,110(10):103519.
APA	Huang X,Ling Z,Zhang HS,Ma J,&Dai LH.(2011).How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?.Journal of Applied Physics,110(10),103519.
MLA	Huang X,et al."How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?".Journal of Applied Physics 110.10(2011):103519.