Dynamic Fracture Instability Of Tough Bulk Metallic Glass

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	Dynamic Fracture Instability Of Tough Bulk Metallic Glass
	Meng JX(孟积兴); Ling Z(凌中); Jiang MQ(蒋敏强); Zhang HS(张虎生); Dai LH(戴兰宏)
刊名	Applied Physics Letters
	2008
通讯作者邮箱	lhdai@lnm.imech.ac.cn
关键词	Shear Bands Initiation
ISSN号	0003-6951
通讯作者	Dai, LH (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
中文摘要	We report the observations of a clear fractographic evolution from vein pattern, dimple structure, and then to periodic corrugation structure, followed by microbranching pattern, along the crack propagation direction in the dynamic fracture of a tough Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit.1) bulk metallic glass (BMGs) under high-velocity plate impact. A model based on fracture surface energy dissipation and void growth is proposed to characterize this fracture pattern transition. We find that once the dynamic crack propagation velocity reaches a critical fraction of Rayleigh wave speed, the crack instability occurs; hence, crack microbranching goes ahead. Furthermore, the correlation between the critical velocity of amorphous materials and their intrinsic strength such as Young's modulus is uncovered. The results may shed new insight into dynamic fracture instability for BMGs. (C) 2008 American Institute of Physics.
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	SHEAR BANDS ; INITIATION
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000255524000027
公开日期	2009-08-03 ; 2009-09-14
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/26058]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Meng JX,Ling Z,Jiang MQ,et al. Dynamic Fracture Instability Of Tough Bulk Metallic Glass[J]. Applied Physics Letters,2008.
APA	Meng JX,Ling Z,Jiang MQ,Zhang HS,&Dai LH.(2008).Dynamic Fracture Instability Of Tough Bulk Metallic Glass.Applied Physics Letters.
MLA	Meng JX,et al."Dynamic Fracture Instability Of Tough Bulk Metallic Glass".Applied Physics Letters (2008).