Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels

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	Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels
	Lei ZQ(雷铮强); Hong YS(洪友士); Xie JJ(谢季佳); Sun CQ(孙成奇); Zhao AG(赵爱国)
刊名	MATERIALS SCIENCE AND ENGINEERING A
	2012-12-15
通讯作者邮箱	hongys@imech.ac.cn
卷号	558 页码:234-241
关键词	Very-high-cycle fatigue FGA Inclusion High strength steels
ISSN号	0921-5093
通讯作者	hongys@imech.ac.cn
产权排序	[Lei, Zhengqiang;Hong, Youshi; Xie, Jijia; Sun, Chengqi; Zhao, Aiguo] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
中文摘要	Fatigue tests with rotary bending (52.5 Hz) and ultrasonic cycling (20 kHz) methods were performed, respectively on two high strength steels so as to investigate the effects of inclusion size and location on the fatigue behavior from low cycle fatigue to very-high-cycle fatigue (VHCF) regimes. Under rotary bending test, four fracture patterns were observed with respect to different locations of inclusion on fracture surface. The mean crack growth rate within FGA (fine granular area of crack origin) was estimated to give the value with the magnitude of 10(-13) m/cycle for the specimens with the fracture pattern of "FGA+surface fisheye". Under ultrasonic cycling test, the size effect of inclusions on VHCF was investigated with two groups of specimens. One is with the inclusion size between 20 and 60 mu m and the other is with the inclusion size between 10 and 30 mu m. The results show that large inclusions lowered the proportion of net FGA at given stress levels and led to the shortening of VHCF life. The degradation of VHCF strength caused by the increase of inclusion size is ascribed to the decrease of the critical stress of FGA formation for large inclusions.
学科主题	疲劳与断裂力学
分类号	一类
收录类别	SCI ; EI
资助信息	NSFC[11021262,11172304];National Basic Research Program of China [2012CB937500]
原文出处	http://www.sciencedirect.com/science/article/pii/S0921509312011021
语种	英语
WOS记录号	WOS:000311249800033
公开日期	2012-12-18
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/45846]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Lei ZQ,Hong YS,Xie JJ,et al. Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels[J]. MATERIALS SCIENCE AND ENGINEERING A,2012,558:234-241.
APA	Lei ZQ,Hong YS,Xie JJ,Sun CQ,&Zhao AG.(2012).Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels.MATERIALS SCIENCE AND ENGINEERING A,558,234-241.
MLA	Lei ZQ,et al."Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels".MATERIALS SCIENCE AND ENGINEERING A 558(2012):234-241.