The characteristics of granular-bright facet in hydrogen pre-charged and uncharged high strength steels in the very high cycle fatigue regime

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	The characteristics of granular-bright facet in hydrogen pre-charged and uncharged high strength steels in the very high cycle fatigue regime
	Y. D. Li; S. M. Chen; Y. B. Liu; Z. G. Yang; S. X. Li; W. J. Hui; Y. Q. Weng
	2010
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	45 期号:3 页码:831-841
摘要	In this study, the effect of hydrogen on fatigue strength of high strength steels in the very high cycle fatigue regime was further discussed. It is found that the calculated results of fatigue strength by modified Murakami's expression are in good accordance with the experimental results in +/- 15% error band. The relationship between fatigue life (N(f)) and the ratio of granular-bright facet (GBF) to inclusion size (root A(GBF)/root A(inc)) for quenching and tempering (QT) specimens and pre-charged specimens by soaking (SK) and cathodic (CD) charging can be approximately expressed by root A(GBF)/root A(inc) = R(GBF)/R(inc) = 0.25N(f)(0.125); however, the value of root A(GBF)/root A(inc) for specimens pre-charged by high-pressure thermal hydrogen charging is obviously greater than that for QT specimens and pre-charged specimens by SK and CD charging at an identical N(f). The stress intensity factor range at the periphery of the GBF, Delta K(GBF), was calculated in this work. It is found that value of Delta K(GBF) is not a constant but approximately proportional to (root A(GBF))(1/3). Besides it is also found that Delta K(GBF) decreases with the increase of hydrogen content.
部门归属	[li, y. d.; chen, s. m.; liu, y. b.; yang, z. g.; li, s. x.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [hui, w. j.; weng, y. q.] cent iron & steel res inst, beijing 100081, peoples r china.;li, yd (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;ydli@imr.ac.cn
关键词	Subsurface Crack Initiation Chromium-bearing Steel Long-life Fatigue N-greater-than-10(7) Cycles Part Ii Mechanism Failure Inclusions Fracture Limit
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WOS记录号	WOS:000273033700034
引用统计	被引频次：21[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/321006/31246
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. D. Li,S. M. Chen,Y. B. Liu,et al. The characteristics of granular-bright facet in hydrogen pre-charged and uncharged high strength steels in the very high cycle fatigue regime[J]. Journal of Materials Science,2010,45(3):831-841.
APA	Y. D. Li.,S. M. Chen.,Y. B. Liu.,Z. G. Yang.,S. X. Li.,...&Y. Q. Weng.(2010).The characteristics of granular-bright facet in hydrogen pre-charged and uncharged high strength steels in the very high cycle fatigue regime.Journal of Materials Science,45(3),831-841.
MLA	Y. D. Li,et al."The characteristics of granular-bright facet in hydrogen pre-charged and uncharged high strength steels in the very high cycle fatigue regime".Journal of Materials Science 45.3(2010):831-841.