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.; Ren, D. C.; Li, S. J.; Wang, H.; Zhang, L. C.; Sercombe, T. B.
	2020-03-01
Source Publication	ADDITIVE MANUFACTURING
Volume	32
Abstract	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.
DOI	10.1016/j.addma.2020.101060
WOS ID	WOS:000522928600041
Citation statistics	Cited Times:10[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/83068
Collection	中国科学院金属研究所
Recommended Citation 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.
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.
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).

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