An experimental investigation of fatigue performance and crack initiation characteristics for an SLMed Ti-6Al-4V under different stress ratios up to very-high-cycle regime

doi:10.1016/j.ijfatigue.2022.107119

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	An experimental investigation of fatigue performance and crack initiation characteristics for an SLMed Ti-6Al-4V under different stress ratios up to very-high-cycle regime
	Fu, Rui 2; Zheng, Liang 2; Ling, Chao 2; Zhong, Zheng 2; Hong YS(洪友士)1
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2022-11-01
卷号	164 页码:14
关键词	Selective laser melting Ti-6Al-4V Very-high-cycle fatigue Crack initiation Stress intensity factor
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2022.107119
通讯作者	Zhong, Zheng(zhongzheng@hit.edu.cn) ; Hong, Youshi(hongys@imech.ac.cn)
英文摘要	The fatigue behavior of SLMed Ti-6Al-4V has been intensively investigated in recent years. However, the effect of stress ratio has not been comprehensively studied, especially in VHCF regime. In this paper, the fatigue per-formance and crack initiation characteristics up to VHCF regime for an SLMed Ti-6Al-4V at various stress ratios (R =-1,-0.5, 0.1 and 0.5) were investigated and the effects of stress ratio were substantially discussed. The stress amplitude decreases with the increase of stress ratio with the order of: sigma(a) (R =-1) > sigma(a) (R =-0.5) > sigma(a) (R = 0.1) > sigma(a) (R = 0.5). Internal crack initiation is dominant in HCF and VHCF regimes under the four stress ratios, although surface crack initiation rarely occurs in HCF regime at R =-1 and 0.5. Whether the crack initiates from subsurface or from interior is affected by the applied maximum stress, and the crack initiation is in relation not only to defect size but also to defect location. The nanograins in RA are evidently formed in VHCF regime at R =-1,-0.5 and 0.1, but not at R = 0.5, which is well explained by the NCP model.
分类号	一类
资助项目	National Natural Science Foundation of China[11932005] ; National Natural Science Foundation of China[11932020] ; Shenzhen Fundamental Research Program[JCYJ20180306171946292]
WOS关键词	ADDITIVELY MANUFACTURED TI-6AL-4V ; MECHANICAL-PROPERTIES ; TENSILE PROPERTIES ; HEAT-TREATMENT ; N-GREATER-THAN-10(7) CYCLES ; BUILD ORIENTATION ; EARLY GROWTH ; PART I ; LASER ; MICROSTRUCTURE
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:000835270000001
资助机构	National Natural Science Foundation of China ; Shenzhen Fundamental Research Program
其他责任者	Zhong, Zheng ; Hong, Youshi
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89837]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing, Peoples R China 2.Harbin Inst Technol Shenzhen, Sch Sci, Shenzhen, Peoples R China;
推荐引用方式 GB/T 7714	Fu, Rui,Zheng, Liang,Ling, Chao,et al. An experimental investigation of fatigue performance and crack initiation characteristics for an SLMed Ti-6Al-4V under different stress ratios up to very-high-cycle regime[J]. INTERNATIONAL JOURNAL OF FATIGUE,2022,164:14.
APA	Fu, Rui,Zheng, Liang,Ling, Chao,Zhong, Zheng,&洪友士.(2022).An experimental investigation of fatigue performance and crack initiation characteristics for an SLMed Ti-6Al-4V under different stress ratios up to very-high-cycle regime.INTERNATIONAL JOURNAL OF FATIGUE,164,14.
MLA	Fu, Rui,et al."An experimental investigation of fatigue performance and crack initiation characteristics for an SLMed Ti-6Al-4V under different stress ratios up to very-high-cycle regime".INTERNATIONAL JOURNAL OF FATIGUE 164(2022):14.