Influence of inclusion size on fatigue behavior of high strength steels in the gigacycle fatigue regime

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	Influence of inclusion size on fatigue behavior of high strength steels in the gigacycle fatigue regime
	J. M. Zhang; S. X. Li; Z. G. Yang; G. Y. Li; W. J. Hui; Y. Q. Weng
	2007
发表期刊	International Journal of Fatigue
ISSN	0142-1123
卷号	29 期号:4 页码:765-771
摘要	The fatigue properties of four high strength steels with same strength class but containing different inclusion sizes were investigated using an ultrasonic fatigue testing machine in the gigacycle fatigue regime. The fracture surfaces were observed using field emission scanning electron microscopy (FESEM) and element distributions at the crack origins were measured by an electron probe rnicroanalyzer (EPMA). The fatigue behavior can be divided into three categories: (a) The S-N curve displays a Continuous decline and the internal cracks initiated from the large oxide inclusions for commercial 50CrV4 steel in which the average inclusion size is about 29 mu m. (b) Step-wise S-N curves were observed for clean 54SiCrV6 and clean 50CrV4 steels in which the average inclusion sizes are about 3.0 and 2.4 mu m respectively. Most fatigue failures originated from the VC inclusion clusters at the lower stress amplitudes. (c) For clean 54SjCr6 steel in which the inclusion size is smaller than 1 mu m the fatigue cracks did not initiated from inclusions or inclusion clusters but from the region enriched with carbon. S-N curve shows that the fatigue failure hardly Occurs from 10(6) to 10(9) cycles, in other words, the fatigue reliability can be substantially improved in the super long fatigue life regime. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, shenyang natl lab mat sci, met res inst, shenyang 110016, peoples r china. cent iron & steel res inst, beijing 100081, peoples r china.;zhang, jm (reprint author), chinese acad sci, shenyang natl lab mat sci, met res inst, shenyang 110016, peoples r china;jmzhang@imr.ac.cn shxli@imr.ac.cn
关键词	High Strength Steel S-n Curve Inclusion Size Gigacycle Fatigue High-cycle Fatigue Tessellated Stresses Life
URL	查看原文
WOS记录号	WOS:000244576900018
引用统计	被引频次：143[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/321006/34033
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. M. Zhang,S. X. Li,Z. G. Yang,et al. Influence of inclusion size on fatigue behavior of high strength steels in the gigacycle fatigue regime[J]. International Journal of Fatigue,2007,29(4):765-771.
APA	J. M. Zhang,S. X. Li,Z. G. Yang,G. Y. Li,W. J. Hui,&Y. Q. Weng.(2007).Influence of inclusion size on fatigue behavior of high strength steels in the gigacycle fatigue regime.International Journal of Fatigue,29(4),765-771.
MLA	J. M. Zhang,et al."Influence of inclusion size on fatigue behavior of high strength steels in the gigacycle fatigue regime".International Journal of Fatigue 29.4(2007):765-771.