Mixed-mode fracture mechanisms near the fatigue threshold of aisi-316 stainless-steel

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Mixed-mode fracture mechanisms near the fatigue threshold of aisi-316 stainless-steel
	Gao HJ(高华健); Delosrios ER; Miller KJ
刊名	Fatigue of Engineering Materials and Structures
	1983
卷号	6 期号:2 页码:137-147
ISSN号	0160-4112
通讯作者	HUA, G (reprint author), ACAD SINICA,INST MECH,BEIJING,PEOPLES R CHINA.
合作状况	国内
中文摘要	Near threshold, mixed mode (I and II), fatigue crack growth occurs mainly by two mechanisms, coplanar (or shear) mode and branch (or tensile) mode. For a constant ratio of ΔK_I/ΔK_II the shear mode growth shows a self-arrest character and it would only start again when ΔK_I and ΔK_II are increased. Both shear crack growth and the early stages of tensile crack growth, are of a crystallographic nature; the fatigue crack proceeds along slip planes or grain boundaries. The appearance of the fracture surfaces suggest that the mechanism of crack extension is by developing slip band microcracks which join up to form a macrocrack. This process is thought to be assisted by the nature of the plastic deformation within the reversed plastic zone where high back stresses are set up by dislocation pile-ups against grain boundaries. The interaction of the crack tip stress field with that of the dislocation pile-ups leads to the formation of slip band microcracks and subsequent crack extension. The change from shear mode to tensile mode growth probably occurs when the maximum tensile stress and the microcrack density in the maximum tensile plane direction attain critical values.
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
收录类别	SCI
原文出处	http://dx.doi.org/10.1111/j.1460-2695.1983.tb00330.x
语种	英语
WOS记录号	WOS:A1983RK52800003
公开日期	2009-08-03 ; 2010-08-20
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/39900]
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	Gao HJ,Delosrios ER,Miller KJ. Mixed-mode fracture mechanisms near the fatigue threshold of aisi-316 stainless-steel[J]. Fatigue of Engineering Materials and Structures,1983,6(2):137-147.
APA	Gao HJ,Delosrios ER,&Miller KJ.(1983).Mixed-mode fracture mechanisms near the fatigue threshold of aisi-316 stainless-steel.Fatigue of Engineering Materials and Structures,6(2),137-147.
MLA	Gao HJ,et al."Mixed-mode fracture mechanisms near the fatigue threshold of aisi-316 stainless-steel".Fatigue of Engineering Materials and Structures 6.2(1983):137-147.