Coupling effects of microstructure and defects on the fatigue properties of laser powder bed fusion Ti-6Al-4V

doi:10.1016/j.addma.2022.103355

IMR OpenIR

	Coupling effects of microstructure and defects on the fatigue properties of laser powder bed fusion Ti-6Al-4V
	Qua, Z.1,2; Zhanga, Z. J.1,2; Zhua, Y. K.1,2; Liua, R.1,2; Lu, S. L.1,2; Li, S. J.1,2; Duan, Q. Q.1,2; Zhang, B. N.1,2,3; Zhao, M. X.3; Eckert, J.4,5; Zhang, Z. F.1,2
通讯作者	Zhanga, Z. J.(zjzhang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2023-01-05
发表期刊	ADDITIVE MANUFACTURING
ISSN	2214-8604
卷号	61 页码:15
摘要	The coupling effects of microstructure and macro-scale defects are significant for the fatigue properties of metallic materials. However, this correlation is still vague for additively manufactured materials. Therefore, the fatigue properties and microstructure of laser powder bed fusion (LPBF) Ti-6Al-4V were studied in this work, it is found that there is an anomalous trade-off relationship between the hardness and the high-cycle fatigue properties. Surprisingly, the softest microstructure has better fatigue resistance, i.e., its tensile strength is reduced by over 23%, while its fatigue strength is increased by -28%, compared with the hardest stress-relieved state. Statistical analysis on the fatigue source morphologies indicates that the hard alpha ' microstructure is sensitive to lack of fusion (LOF)-type defects while the soft lamellar (alpha + beta) microstructure is sensitive to pore-type defects, which may be related to the higher tolerance concerning sharp defects for the soft microstructure relative to the hard one. Through considering the transition of the fatigue cracking mechanism and the effect of the microstructure, a fatigue life prediction model has been developed based on the Murakami theory, which does not only give a sound explanation for the trade-off relationship but is also in good agreement with the fatigue data for different defect characteristics and microstructure states at different applied stress amplitudes.
关键词	Laser powder bed fusion Ti-6Al-4 V alloy Fatigue properties Defects Microstructure
资助者	Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences project ; KC Wong Education Foundation ; National Key R&D Program of China ; IMR Innovation Foundation
DOI	10.1016/j.addma.2022.103355
收录类别	SCI
语种	英语
资助项目	Youth Innovation Promotion Association CAS[2021192] ; National Natural Science Foundation of China (NSFC)[52130002] ; National Natural Science Foundation of China (NSFC)[52261135634] ; National Natural Science Foundation of China (NSFC)[U2241245] ; Chinese Academy of Sciences project[172GJHZ2022030MI] ; KC Wong Education Foundation[GJTD-2020-09] ; National Key R&D Program of China[2020YFA0710404] ; IMR Innovation Foundation[2021-PY05]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS记录号	WOS:000903718800002
出版者	ELSEVIER
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/175422
专题	中国科学院金属研究所
通讯作者	Zhanga, Z. J.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Xian Bright Laser Technol Co Ltd, Xian 710000, Peoples R China 4.Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria 5.Univ Leoben, Dept Mat Sci, Chair Mat Phys, Jahnstr 12, A-8700 Leoben, Austria
推荐引用方式 GB/T 7714	Qua, Z.,Zhanga, Z. J.,Zhua, Y. K.,et al. Coupling effects of microstructure and defects on the fatigue properties of laser powder bed fusion Ti-6Al-4V[J]. ADDITIVE MANUFACTURING,2023,61:15.
APA	Qua, Z..,Zhanga, Z. J..,Zhua, Y. K..,Liua, R..,Lu, S. L..,...&Zhang, Z. F..(2023).Coupling effects of microstructure and defects on the fatigue properties of laser powder bed fusion Ti-6Al-4V.ADDITIVE MANUFACTURING,61,15.
MLA	Qua, Z.,et al."Coupling effects of microstructure and defects on the fatigue properties of laser powder bed fusion Ti-6Al-4V".ADDITIVE MANUFACTURING 61(2023):15.