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

IMECH-IR > 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)
通讯作者	Zheng, Liang(icon_lzheng@hit.edu.cn)
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
	2024-04-01
卷号	181 页码:13
ISSN	0142-1123
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.
关键词	Fatigue life prediction LPBF-fabricated Ti-6Al-4V Continuum damage mechanics Defect Very-high-cycle fatigue
DOI	10.1016/j.ijfatigue.2023.108131
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001161603800001
关键词[WOS]	CRACK INITIATION ; SURFACE-ROUGHNESS ; PART II ; STRENGTH ; PERFORMANCE ; FAILURE ; STEELS ; MODEL ; OPTIMIZATION ; INCLUSIONS
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
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]
项目资助者	Guangdong Basic and Applied Basic Research Foundation ; Shenzhen Municipal Science and Technology Innovation Council
论文分区	一类
力学所作者排名	3+
RpAuthor	Zheng, Liang
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/94349
专题	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.