Fatigue life prediction for LPBF-fabricated Ti-6Al-4V up to very-high-cycle regime based on continuum damage mechanics incorporating effect of defects

doi:10.1016/j.ijfatigue.2023.108131

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

	Fatigue life prediction for LPBF-fabricated Ti-6Al-4V up to very-high-cycle regime based on continuum damage mechanics incorporating effect of defects
	Ling, Chao; Jia, Yinfeng; Fu, Rui; Zheng, Liang; Zhong, Zheng; Hong YS(洪友士)
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2024-04-01
卷号	181 页码:13
关键词	Fatigue life prediction LPBF-fabricated Ti-6Al-4V Continuum damage mechanics Defect Very-high-cycle fatigue
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2023.108131
通讯作者	Zheng, Liang(icon_lzheng@hit.edu.cn)
英文摘要	Defects and microstructural inhomogeneity have been recognized to have a significant impact on the fatigue performance of titanium alloys fabricated by laser powder bed fusion (LPBF). In this work, a modified Chaboche fatigue damage model incorporating the effect of defects was proposed to predict the fatigue life of LPBFfabricated Ti-6Al-4V under different stress ratios up to very-high-cycle fatigue regime. A nonlinear effect of mean stress observed in LPBF-fabricated Ti-6Al-4V was also considered in the model. The S-N data, critical defect sizes and locations obtained from our previous experimental work were utilized to calibrate and validate the proposed model. The scatter in fatigue life up to 109 cycles was predicted by the model for samples with subsurface and internal defects of size ranging from 30 mu m to 150 mu m under different stress ratios, and the prediction results agree with the experimental results very well. Based on the statistics of defect sizes and locations, the S-N curves for failure probabilities of 5 %, 50 % and 95 % were obtained for these stress ratios, and shown to be in reasonable agreement with the experimental data.
分类号	一类
资助项目	Guangdong Basic and Applied Basic Research Foundation[2023A1515012012] ; Shenzhen Municipal Science and Technology Innovation Council[ZDSYS20210 616110000001] ; Shenzhen Municipal Science and Technology Innovation Council[GXWD20220817151830003] ; Shenzhen Municipal Science and Technology Innovation Council[KQTD2020082011304 5083]
WOS关键词	CRACK INITIATION ; SURFACE-ROUGHNESS ; PART II ; STRENGTH ; PERFORMANCE ; FAILURE ; STEELS ; MODEL ; OPTIMIZATION ; INCLUSIONS
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:001161603800001
资助机构	Guangdong Basic and Applied Basic Research Foundation ; Shenzhen Municipal Science and Technology Innovation Council
其他责任者	Zheng, Liang
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/94348]
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	Ling, Chao,Jia, Yinfeng,Fu, Rui,et al. Fatigue life prediction for LPBF-fabricated Ti-6Al-4V up to very-high-cycle regime based on continuum damage mechanics incorporating effect of defects[J]. INTERNATIONAL JOURNAL OF FATIGUE,2024,181:13.
APA	Ling, Chao,Jia, Yinfeng,Fu, Rui,Zheng, Liang,Zhong, Zheng,&洪友士.(2024).Fatigue life prediction for LPBF-fabricated Ti-6Al-4V up to very-high-cycle regime based on continuum damage mechanics incorporating effect of defects.INTERNATIONAL JOURNAL OF FATIGUE,181,13.
MLA	Ling, Chao,et al."Fatigue life prediction for LPBF-fabricated Ti-6Al-4V up to very-high-cycle regime based on continuum damage mechanics incorporating effect of defects".INTERNATIONAL JOURNAL OF FATIGUE 181(2024):13.