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	Atomistic study of lattice trapping behavior for brittle fracture in bcc-iron
	Guo, Ya-Fang ; Wang, Chong-Yu
	2010-05-06 ; 2010-05-06
关键词	atomistic simulations lattice trapping anisotropy brittle fracture slip systems bcc-iron CLEAVAGE ANISOTROPY TRANSITION-METALS ALPHA-IRON AB-INITIO SILICON CRACKS PROPAGATION SIMULATION CRYSTALS ENERGY Materials Science, Multidisciplinary
中文摘要	The lattice trapping behavior for brittle fracture in bcc-iron has been studied by atomistic simulations. A pronounced anisotropy for brittle cleavage fracture of a mode I crack is observed in the discrete atomistic scale, and the preferred direction for cleavage is along the < 110 > direction on both {100} and {011} planes. The analysis of the atomic structure indicates that, due to the shear effect at the crack tip, the stacking faults or partial dislocations are formed before crack cleavage occurs. For the crack with a < 110 > crack front, shear occurs easily along the slip direction of bcc crystals, whereas for the crack with a < 100 > front, shear can only occur along the non-slip direction, and a strong lattice trapping is exhibited. We conclude that the anisotropy for cleavage fracture and the lattice trapping behavior are closely related with the slip systems of bcc crystals. (C) 2007 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15478]
专题	清华大学
推荐引用方式 GB/T 7714	Guo, Ya-Fang,Wang, Chong-Yu. Atomistic study of lattice trapping behavior for brittle fracture in bcc-iron[J],2010, 2010.
APA	Guo, Ya-Fang,&Wang, Chong-Yu.(2010).Atomistic study of lattice trapping behavior for brittle fracture in bcc-iron..
MLA	Guo, Ya-Fang,et al."Atomistic study of lattice trapping behavior for brittle fracture in bcc-iron".(2010).

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