Very high cycle fatigue mechanism of carbide-free bainite/martensite steel micro-alloyed with Nb

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	Very high cycle fatigue mechanism of carbide-free bainite/martensite steel micro-alloyed with Nb
	Y. Yu; J. L. Gu; B. Z. Bai; Y. B. Liu; S. X. Li
	2009
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	527 期号:1-2 页码:212-217
摘要	In this study, the carbide-free bainite/martensite (CFB/M) steel was micro-alloyed with Nb (CFB/M-Nb). The very high cycle fatigue (VHCF) behaviors of this CFB/M-Nb steel were investigated by ultrasonic fatigue test. Especially, different microstructures of the CFB/M-Nb steel were deliberately designed to disclose the VHCF failure mechanism. In addition, the effect of hydrogen in the formation of the optical dark area (ODA) was analyzed, which was thought to control the formation of ODA by concentrating around interior inclusions. Results show the hydrogen cannot be considered to dominate the formation of ODA. Mostly important, "soft or coarsely soft structure induced fatigue crack" should be responsible for the primary VHCF failure mechanism of CFB/M-Nb steel. (C) 2009 Elsevier B.V. All rights reserved.
部门归属	[yu, y.; gu, j. l.; bai, b. z.] tsinghua univ, dept mat sci & engn, adv mat lab, beijing 100084, peoples r china. [liu, y. b.; li, s. x.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;yu, y (reprint author), tsinghua univ, dept mat sci & engn, adv mat lab, beijing 100084, peoples r china;yang.yu.yuy@gmail.com
关键词	Carbide-free Bainite/martensite Very High Cycle Fatigue High Strength Steel S-n Curve Mechanism Life Regime Strength
URL	查看原文
WOS记录号	WOS:000271611500031
引用统计	被引频次：40[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/321006/32517
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Yu,J. L. Gu,B. Z. Bai,et al. Very high cycle fatigue mechanism of carbide-free bainite/martensite steel micro-alloyed with Nb[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2009,527(1-2):212-217.
APA	Y. Yu,J. L. Gu,B. Z. Bai,Y. B. Liu,&S. X. Li.(2009).Very high cycle fatigue mechanism of carbide-free bainite/martensite steel micro-alloyed with Nb.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,527(1-2),212-217.
MLA	Y. Yu,et al."Very high cycle fatigue mechanism of carbide-free bainite/martensite steel micro-alloyed with Nb".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 527.1-2(2009):212-217.