Dislocations emission and crack extension at the atomistic crack tip in body-centered-cubic metal Mo

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	Dislocations emission and crack extension at the atomistic crack tip in body-centered-cubic metal Mo
	Tang QH(汤奇恒); Wang ZQ(王自强)
刊名	Journal of Materials Research
	1999
卷号	14 期号:10 页码:4035-4043
ISSN号	0884-2914
通讯作者	Tang, QH (reprint author), Chinese Acad Sci, LNM Inst Mech, Beijing 100080, Peoples R China.
中文摘要	The behaviors of a crack in body-centered-cubic metal Mo under different loading modes were studied using the molecular dynamics method. Dislocation emission was observed near the crack tip in response to mode II loading with theta = 0 degrees in which theta is the inclination angle of the slip plane with respect to the crack plane, and two full dislocations were observed at the stress level of K-II = 1.17 MPa m(1/2) without any evidence of crack extension. Within the range of 0 degrees less than or equal to theta less than or equal to 45 degrees, crack extension was observed in response to mode I loading, and the effect of crystal orientation on the crack propagation was studied, The crack propagated along the [111] slip direction without any evidence of dislocations emission.
学科主题	力学
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
关键词[WOS]	NUCLEATION ; FRACTURE ; BRITTLE ; BEHAVIOR ; DUCTILE ; SIMULATION ; CRITERIA ; GEOMETRY ; CLEAVAGE ; CRYSTALS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000083163700031
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16876]
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	Tang QH,Wang ZQ. Dislocations emission and crack extension at the atomistic crack tip in body-centered-cubic metal Mo[J]. Journal of Materials Research,1999,14(10):4035-4043.
APA	汤奇恒,&王自强.(1999).Dislocations emission and crack extension at the atomistic crack tip in body-centered-cubic metal Mo.Journal of Materials Research,14(10),4035-4043.
MLA	汤奇恒,et al."Dislocations emission and crack extension at the atomistic crack tip in body-centered-cubic metal Mo".Journal of Materials Research 14.10(1999):4035-4043.