Enhanced fatigue characteristics of a topology-optimized porous titanium structure produced by selective laser melting

doi:10.1016/j.addma.2020.101060

IMR OpenIR

	Enhanced fatigue characteristics of a topology-optimized porous titanium structure produced by selective laser melting
	Liu, Y. J.1,2; Ren, D. C.1,4; Li, S. J.1,4; Wang, H.1,4; Zhang, L. C.3; Sercombe, T. B.2
通讯作者	Li, S. J.(shjli@imr.ac.cn) ; Zhang, L. C.(zhang@ecu.edu.au) ; Sercombe, T. B.(tim.sercombe@uwa.edu.au)
	2020-03-01
发表期刊	ADDITIVE MANUFACTURING
ISSN	2214-8604
卷号	32 页码:10
摘要	The fatigue properties are critical considerations for porous structures, and most of the existing porous materials have unsatisfactory performances due to a lack of structural optimization. This work shows that a topology-optimized structure fabricated by selective laser melting using commercial-purity titanium (CP-Ti) exhibits excellent fatigue properties with an ultra-high normalized fatigue life of similar to 0.65 at 10(6) cycles and at a low density of 1.3 g/cm(3). The main factors affecting fatigue, i.e., material properties and a porous structure were studied. Both the factors can affect the fatigue crack initiation time, thereby affecting the fatigue life. Because of twinning that occurred during the fatigue process, the porous CP-Ti samples exhibit a high plasticity. In addition, the fatigue crack propagation rate is significantly reduced because of the high plasticity of the CP-Ti material and the occurrence of fatigue crack deflection.
关键词	Selective laser melting Titanium alloy Fatigue property Porous structure Twinning
资助者	Chinese MoST ; Key Research Program of Frontier Sciences, CAS ; National Natural Science Foundation of China ; Australian Research Council
DOI	10.1016/j.addma.2020.101060
收录类别	SCI
语种	英语
资助项目	Chinese MoST[2016YFC1102601] ; Chinese MoST[2017YFC1104903] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC031-02] ; National Natural Science Foundation of China[51871220] ; Australian Research Council[DP170104307]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Manufacturing ; Materials Science, Multidisciplinary
WOS记录号	WOS:000522928600041
出版者	ELSEVIER
引用统计	被引频次：96[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/321006/138451
专题	中国科学院金属研究所
通讯作者	Li, S. J.; Zhang, L. C.; Sercombe, T. B.
作者单位	1.Chinese Acad Sci, Inst Met Res, Titanium Alloy Lab, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Western Australia, Sch Mech & Chem Engn, 35 Stirling Highway, Nedlands, WA 6009, Australia 3.Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027 USA 4.Univ Sci & Technol China, 96 JinZhai Rd, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Liu, Y. J.,Ren, D. C.,Li, S. J.,et al. Enhanced fatigue characteristics of a topology-optimized porous titanium structure produced by selective laser melting[J]. ADDITIVE MANUFACTURING,2020,32:10.
APA	Liu, Y. J.,Ren, D. C.,Li, S. J.,Wang, H.,Zhang, L. C.,&Sercombe, T. B..(2020).Enhanced fatigue characteristics of a topology-optimized porous titanium structure produced by selective laser melting.ADDITIVE MANUFACTURING,32,10.
MLA	Liu, Y. J.,et al."Enhanced fatigue characteristics of a topology-optimized porous titanium structure produced by selective laser melting".ADDITIVE MANUFACTURING 32(2020):10.