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); hongys@imech.ac.cn
发表期刊	MATERIALS SCIENCE AND ENGINEERING A
	2012-12-15
卷号	558 页码:234-241
ISSN	0921-5093
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.
关键词	Very-high-cycle Fatigue Fga Inclusion High Strength Steels
学科领域	疲劳与断裂力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000311249800033
项目资助者	NSFC[11021262,11172304];National Basic Research Program of China [2012CB937500]
课题组名称	LNM金属材料微结构与力学性能
论文分区	一类
引用统计	被引频次：90[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/45846
专题	非线性力学国家重点实验室
通讯作者	hongys@imech.ac.cn
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,&hongys@imech.ac.cn.(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.

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