The nature and the mechanism of crack initiation and early growth for very-high-cycle fatigue of metallic materials - An overview

doi:10.1016/j.tafmec.2017.05.002

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	The nature and the mechanism of crack initiation and early growth for very-high-cycle fatigue of metallic materials - An overview
	Hong YS(洪友士); Sun CQ(孙成奇)
刊名	THEORETICAL AND APPLIED FRACTURE MECHANICS
	2017-12-01
卷号	92 页码:331-350
关键词	Very-high-cycle Fatigue Fatigue Crack Initiation Fine-granular-area Nanograins High-strength Steels Titanium Alloys
ISSN号	0167-8442
DOI	10.1016/j.tafmec.2017.05.002
文献子类	Article
英文摘要	Very-high-cycle fatigue (VHCF) is the fatigue damage and failure beyond 107 loading cycles. Crack initiation of VHCF for metallic materials is commonly from the interior of specimens and possesses a unique feature of fish-eye (FiE) containing a fine-granular-area (FGA). It is regarded that FGA together with FiE is the characteristic region of crack initiation for VHCF, because it consumes more than 95% of total fatigue life and the value of stress intensity factor range for this region keeps constant for a given material. The aim of this overview is to summarize the research progress on the crack initiation characteristics and the related mechanisms for VHCF of metallic materials. After a brief introduction to the origination of VHCF research in 1980s, this overview contains the following parts: Characteristics of crack initiation region for VHCF, Characteristic region and intrinsic dimensions of crack initiation for VHCF, The formation mechanism and the model of crack initiation region, The new model of Numerous Cyclic Pressing to explain the formation mechanism of FGA, and Verification of proposed NCP model. In the descriptions, the two essential aspects are especially focused: the nature of crack initiation region for VHCF, and the mechanism for the formation of crack initiation region. (C) 2017 Elsevier Ltd. All rights reserved.
分类号	一类
WOS关键词	HIGH-STRENGTH STEELS ; CHROMIUM-BEARING STEEL ; REGIME N-GREATER-THAN-10(7) CYCLES ; SEVERE PLASTIC-DEFORMATION ; ION MASS-SPECTROMETRY ; LONG-LIFE FATIGUE ; S-N CURVE ; TI-6AL-4V ALLOY ; PROPAGATION MECHANISM ; ULTRASONIC FREQUENCY
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000417774700033
资助机构	National Natural Science Foundation of China(11572325) ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB22040503 ; XDB22020201)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/72224]
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	Hong YS,Sun CQ. The nature and the mechanism of crack initiation and early growth for very-high-cycle fatigue of metallic materials - An overview[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2017,92:331-350.
APA	洪友士,&孙成奇.(2017).The nature and the mechanism of crack initiation and early growth for very-high-cycle fatigue of metallic materials - An overview.THEORETICAL AND APPLIED FRACTURE MECHANICS,92,331-350.
MLA	洪友士,et al."The nature and the mechanism of crack initiation and early growth for very-high-cycle fatigue of metallic materials - An overview".THEORETICAL AND APPLIED FRACTURE MECHANICS 92(2017):331-350.