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Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting
Liu, Y. J.; Wang, H. L.; Li, S. J.; Wang, S. G.; Wang, W. J.; Hou, W. T.; Hao, Y. L.; Yang, R.; Zhang, L. C.; Zhang, LC (reprint author), Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.; Li, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-03-01
发表期刊ACTA MATERIALIA
ISSN1359-6454
卷号126页码:58-66
摘要beta-type titanium porous structure is a new class of solution for implant because it offers excellent combinations of high strength and low Young's modulus. This work investigated the influenceof porosity variation in electron beam melting (EBM)-produced beta-type Ti2448 alloy samples on the mechanical properties including super-elastic property, Young's modulus, compressive strength and fatigue properties. The relationship between the misorientation angle of adjacent grains and fatigue crack deflection behaviors was also observed. The super-elastic property is improved as the porosity of samples increases because of increasing tensile/compressive ratio. For the first time, the position of fatigue crack initiation is defined in stress-strain curves based on the variation of the fatigue cyclic loops. The unique manufacturing process of EBM results in the generation of different sizes of grains, and the apparent fatigue crack deflection occurs at the grain boundaries in the columnar grain zone due to substantial misorientation between adjacent grains. Compared with Ti-6Al-4V samples, the Ti2448 porous samples exhibit a higher normalized fatigue strength owing to super-elastic property, greater plastic zone ahead of the fatigue crack tip and the crack deflection behavior. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; beta-type titanium porous structure is a new class of solution for implant because it offers excellent combinations of high strength and low Young's modulus. This work investigated the influenceof porosity variation in electron beam melting (EBM)-produced beta-type Ti2448 alloy samples on the mechanical properties including super-elastic property, Young's modulus, compressive strength and fatigue properties. The relationship between the misorientation angle of adjacent grains and fatigue crack deflection behaviors was also observed. The super-elastic property is improved as the porosity of samples increases because of increasing tensile/compressive ratio. For the first time, the position of fatigue crack initiation is defined in stress-strain curves based on the variation of the fatigue cyclic loops. The unique manufacturing process of EBM results in the generation of different sizes of grains, and the apparent fatigue crack deflection occurs at the grain boundaries in the columnar grain zone due to substantial misorientation between adjacent grains. Compared with Ti-6Al-4V samples, the Ti2448 porous samples exhibit a higher normalized fatigue strength owing to super-elastic property, greater plastic zone ahead of the fatigue crack tip and the crack deflection behavior. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属[liu, y. j. ; zhang, l. c.] edith cowan univ, sch engn, 270 joondalup dr, perth, wa 6027, australia ; [liu, y. j. ; wang, h. l. ; li, s. j. ; wang, s. g. ; wang, w. j. ; hou, w. t. ; hao, y. l. ; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
关键词Electron Beam Melting Titanium Alloys Mechanical Properties Heat Treatment Porous Structures Super-elasticity
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者Chinese MoST [2015AA033702, 2016YFC1102601]; National Natural Science Foundation of China [51271182, 51271180, 51631007]; Australian Research Council [DP110101653]; ECU-PRS (International) Scholarship Scheme
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/78248
专题中国科学院金属研究所
通讯作者Zhang, LC (reprint author), Edith Cowan Univ, Sch Engn, 270 Joondalup Dr, Perth, WA 6027, Australia.; Li, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Liu, Y. J.,Wang, H. L.,Li, S. J.,et al. Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting[J]. ACTA MATERIALIA,2017,126:58-66.
APA Liu, Y. J..,Wang, H. L..,Li, S. J..,Wang, S. G..,Wang, W. J..,...&Li, SJ .(2017).Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting.ACTA MATERIALIA,126,58-66.
MLA Liu, Y. J.,et al."Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting".ACTA MATERIALIA 126(2017):58-66.
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