Deformation twinning and its effect on crack extension

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	Deformation twinning and its effect on crack extension
	Tang QH(汤奇恒); Wang ZQ(王自强)
刊名	Acta Materialia
	1998
卷号	46 期号:15 页码:5313-5321
ISSN号	1359-6454
通讯作者	Tang, QH (reprint author), Chinese Acad Sci, LNM Inst Mech, Beijing 100080, Peoples R China.
中文摘要	Deformation twinning near a crack tip is observed in b.c.c. metal Mo based on molecular dynamics simulation at temperature T = 50 K and loading rate (K) over dot(II) = 0.0706 MPa m(1/2)/ps. The defor mation twinning is closely controlled by both the crystal geometry orientation and the stress distribution. The width of the deformation twin band is affected by the distance between the upper and lower crack surfaces. The twin plane and twin direction are (<1(1)over bar>2) and [(1) over bar 11], respectively. The initial crack extension occurs in the deformation twin region near the crack tip. The simulation shows that the extension direction of the crack is changed as the crack propagates over the twinning boundary.
学科主题	力学
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	FRACTURE ; METALS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000076266600009
公开日期	2007-06-15
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16499]
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. Deformation twinning and its effect on crack extension[J]. Acta Materialia,1998,46(15):5313-5321.
APA	汤奇恒,&王自强.(1998).Deformation twinning and its effect on crack extension.Acta Materialia,46(15),5313-5321.
MLA	汤奇恒,et al."Deformation twinning and its effect on crack extension".Acta Materialia 46.15(1998):5313-5321.