|The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting|
|Zhao, S.; Li, S. J.; Hou, W. T.; Hao, Y. L.; Yang, R.; Misra, R. D. K.; Li, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
|发表期刊||JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
|摘要||Additive manufacturing technique is a promising approach for fabricating cellular bone substitutes such as trabecular and cortical bones because of the ability to adjust process parameters to fabricate different shapes and inner structures. Considering the long term safe application in human body, the metallic cellular implants are expected to exhibit superior fatigue property. The objective of the study was to study the influence of cell shape on the compressive fatigue behavior of Ti-6Al-4V mesh arrays fabricated by electron beam melting. The results indicated that the underlying fatigue mechanism for the three kinds of meshes (cubic, G7 and rhombic dodecahedron) is the interaction of cyclic ratcheting and fatigue crack growth on the struts, which is closely related to cumulative effect of buckling and bending deformation of the strut. By increasing the buckling deformation on the struts through cell shape design, the cyclic ratcheting rate of the meshes during cyclic deformation was decreased and accordingly, the compressive fatigue strength was increased. With increasing bending deformation of struts, fatigue crack growth in struts contributed more to the fatigue damage of meshes. Rough surface and pores contained in the struts significantly deteriorated the compressive fatigue strength of the struts. By optimizing the buckling and bending deformation through cell shape design, Ti-6Al-4V alloy cellular solids with high fatigue strength and low modulus can be fabricated by the EBM technique. (C) 2015 Elsevier Ltd. All rights reserved.|
; li, s. 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
; [misra, r. d. k.] univ texas el paso, dept met mat & biomed engn, 500w univ ave, el paso, tx 79968 usa
|关键词||Electron Beam Melting
Compressive Fatigue Behavior
Cell Shape Effect
; Materials Science
|资助者||863 Project [2015AA033702]; National Basic Research Program of China [2012CB619103, 2012CB933901, 2012CB933902]; National Natural Science Foundation of China [51271182, 51271180]; University of Texas at El Paso
|通讯作者||Li, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.|
Zhao, S.,Li, S. J.,Hou, W. T.,et al. The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting[J]. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,2016,59:251-264.
Zhao, S..,Li, S. J..,Hou, W. T..,Hao, Y. L..,Yang, R..,...&Li, SJ .(2016).The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting.JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,59,251-264.
Zhao, S.,et al."The influence of cell morphology on the compressive fatigue behavior of Ti-6Al-4V meshes fabricated by electron beam melting".JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS 59(2016):251-264.