Effect of Defects on High Cycle Fatigue Property of Selective Laser Melted Ti6Al4V Alloy

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	Effect of Defects on High Cycle Fatigue Property of Selective Laser Melted Ti6Al4V Alloy
	Liu Lun 1,3; Zhang Zhenjun 3; Yang Huajie 3; Ji Haibin 3; Chen Jie 2; Yi Junlan 2; Wang Lei 2; Li Xiaowu 1; Zhang Zhefeng 3
刊名	RARE METAL MATERIALS AND ENGINEERING
	2021-12-01
卷号	50 期号:12 页码:4429-4436
关键词	selective laser melting Ti6Al4V alloy microstructure defect high cycle fatigue property
ISSN号	1002-185X
通讯作者	Liu Lun(1870337@stu.neu.edu.cn)
英文摘要	It is of significant importance to understand the influence of defects on the fatigue property of Ti6Al4V alloy prepared by selective laser melting for breaking through the limitation of this material in industrial applications. As the defects cannot be completely avoided, the microstructure and defect characterizations, high cycle fatigue performance and failure mechanism of the material were studied by OM, EBSD, X-ray tomography, fatigue testing machine, SEM, and laser confocal microscope. The results show that the microstructure of the alloy exhibits the unique process characteristics of additive manufacturing materials. Specifically, the density of the material is 99.99%, and the overall defect size is less than 60 mu m. The fatigue limit of the material is 398 MPa, fatigue cracks are formed in the lack of fusion defects of the fracture specimens and the cycles are less than 10(6). The effective stress intensity factors at the defects of the fractured samples are mostly distributed above the threshold value of short crack fatigue crack growth, which determines the low cycle life of the material. Finally, the K-T model was introduced to establish an evaluation method for the safe service of the material.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000752491900032
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173499]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu Lun
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China 2.COMAC Shanghai Aircraft Mfg Co Ltd, Shanghai 201324, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu Lun,Zhang Zhenjun,Yang Huajie,et al. Effect of Defects on High Cycle Fatigue Property of Selective Laser Melted Ti6Al4V Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2021,50(12):4429-4436.
APA	Liu Lun.,Zhang Zhenjun.,Yang Huajie.,Ji Haibin.,Chen Jie.,...&Zhang Zhefeng.(2021).Effect of Defects on High Cycle Fatigue Property of Selective Laser Melted Ti6Al4V Alloy.RARE METAL MATERIALS AND ENGINEERING,50(12),4429-4436.
MLA	Liu Lun,et al."Effect of Defects on High Cycle Fatigue Property of Selective Laser Melted Ti6Al4V Alloy".RARE METAL MATERIALS AND ENGINEERING 50.12(2021):4429-4436.