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

文献类型：期刊论文

作者Qua, Z.3,4; Zhanga, Z. J.3,4; Zhua, Y. K.3,4; Liua, R.3,4; Lu, S. L.3,4; Li, S. J.3,4; Duan, Q. Q.3,4; Zhang, B. N.1,3,4; Zhao, M. X.1; Eckert, J.2,5
刊名ADDITIVE MANUFACTURING
出版日期2023-01-05
卷号61页码:15
关键词Laser powder bed fusion Ti-6Al-4 V alloy Fatigue properties Defects Microstructure
ISSN号2214-8604
DOI10.1016/j.addma.2022.103355
通讯作者Zhanga, Z. J.(zjzhang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
英文摘要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.
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
语种英语
WOS记录号WOS:000903718800002
出版者ELSEVIER
资助机构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
源URL[http://ir.imr.ac.cn/handle/321006/175421]  
专题金属研究所_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.Xian Bright Laser Technol Co Ltd, Xian 710000, Peoples R China
2.Univ Leoben, Dept Mat Sci, Chair Mat Phys, Jahnstr 12, A-8700 Leoben, Austria
3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
5.Austrian Acad Sci, Erich Schmid Inst Mat Sci, 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.

入库方式： OAI收割

来源：金属研究所

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