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石志良,卢小龙,黄琛,李锋,孙允龙.钛合金植入物梯度孔结构设计及其力学性能[J].稀有金属材料与工程(英文),2019,48(6):1829~1834.[Shi Zhiliang,Lu Xiaolong,Huang Chen,Li Feng and Sun Yunlong.Gradient Pore Structure Design and Mechanical Properties Analysis of Titanium Alloy Implant[J].Rare Metal Materials and Engineering,2019,48(6):1829~1834.]
Gradient Pore Structure Design and Mechanical Properties Analysis of Titanium Alloy Implant
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Received:January 05, 2018  Revised:January 31, 2018
Key words: additive manufacturing  gradient pore structure  computer-aided design  implant  mechanical properties
Foundation item:国家重点研发计划项目资助(项目号2016YFB1101300)
Author NameAffiliation
Shi Zhiliang,Lu Xiaolong,Huang Chen,Li Feng and Sun Yunlong  
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      For the design of pore structure of titanium alloy implants, most of the current researches are on regular pore structures, while few of them are concerned with the design of gradient pore structures. In this research, two methods of designing circular pores with Planar Center Gradient and Spatial Sphere Gradient are proposed. On this basis, a certain model design of Planar Center Gradient is completed, some samples of titanium alloy gradient pore and regular pore structure implants with a porosity of 75% were fabricated by Selective Laser Melting(SLM), and made microscopic material characterization. Through the test of mechanical properties, the related mechanical data are obtained. Conclusion: The mechanical properties of the gradient pore structure are better than those of regular pores. Under the condition of porosity of 75%, the average elastic modulus of gradient pore sample is 36.25% higher than that of regular pore and the average compressive strength is increased by 29.9%.