In situ TEM study of the effect of M/A films at grain boundaries on crack propagation in an ultra-fine acicular ferrite pipeline steel

doi:10.1016/j.actamat.2005.09.015

IMR OpenIR

	In situ TEM study of the effect of M/A films at grain boundaries on crack propagation in an ultra-fine acicular ferrite pipeline steel
	Zhong, Y ; Xiao, F ; Zhang, JW ; Shan, YY ; Wang, W ; Yang, K
通讯作者	Zhong, Y(zy@imr.ac.cn)
	2006
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	54 期号:2 页码:435-443
摘要	Microstructural refinement of structural materials generally improves their tensile properties but deteriorates their fatigue properties. However, pipeline steels with ultra-fine acicular ferrite (UFAF) possess not only high strength and toughness, but also a low fatigue-crack-growth rate (FCGR) and long fatigue-propagation life. In this paper, the micro-fracture mechanisms of an UFAF pipeline steel are investigated by in situ tensile testing in a transmission electron microscope. The results indicate that a grain-boundary-film structure composed of martensite/austenite could significantly influence the crack propagating behavior in the UFAF steel, consequently lowering the FCGR by enhancing roughness-induced crack closure during cyclic loading. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	in situ TEM fatigue crack growth grain boundary structure crack closure pipeline steels
DOI	10.1016/j.actamat.2005.09.015
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000234785200014
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：187[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/86202
专题	中国科学院金属研究所
通讯作者	Zhong, Y
作者单位	1.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 2.Yanshan Univ, Coll Mat Sci & Engn, Qinhuangdao 066004, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Y,Xiao, F,Zhang, JW,et al. In situ TEM study of the effect of M/A films at grain boundaries on crack propagation in an ultra-fine acicular ferrite pipeline steel[J]. ACTA MATERIALIA,2006,54(2):435-443.
APA	Zhong, Y,Xiao, F,Zhang, JW,Shan, YY,Wang, W,&Yang, K.(2006).In situ TEM study of the effect of M/A films at grain boundaries on crack propagation in an ultra-fine acicular ferrite pipeline steel.ACTA MATERIALIA,54(2),435-443.
MLA	Zhong, Y,et al."In situ TEM study of the effect of M/A films at grain boundaries on crack propagation in an ultra-fine acicular ferrite pipeline steel".ACTA MATERIALIA 54.2(2006):435-443.