Mechanical property and biological behaviour of additive manufactured TiNi functionally graded lattice structure

作     者：Chaolin Tan Cheng Deng Sheng Li Alessandro Abena Parastoo Jamshidi Khamis Essa Likang Wu Guohua Xu Moataz M Attallah Jia Liu Chaolin Tan;Cheng Deng;Sheng Li;Alessandro Abena;Parastoo Jamshidi;Khamis Essa;Likang Wu;Guohua Xu;Moataz M Attallah;Jia Liu

作者机构：School of Metallurgy&MaterialsUniversity of BirminghamBirmingham B152TTUnited Kingdom Department of Orthopedic SurgerySecond Affiliated Hospital of Naval Medical UniversityShanghai 200003People's Republic of China School of EngineeringUniversity of BirminghamBirmingham B152TTUnited Kingdom School of Mechanical&Automotive EngineeringSouth China University of TechnologyGuangzhou 510640People's Republic of China 

出 版 物：《International Journal of Extreme Manufacturing》 (极端制造（英文）)

年 卷 期：2022年第4卷第4期

页      面：207-213页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China(52005189) Guangdong Basic and Applied Basic Research Foundation(2019A1515110542 and 2020A1515110699) Guangzhou Foreign Cooperation Projects(2020B1212060049 and 201704030067) Guangdong Academy of Sciences and the University of Birmingham(Contract 17-0551) 

主　　题：additive manufacturing bio-inspired graded lattice mechanical properties biological compatibility 

摘      要：Bio-inspired porous metallic scaffolds have tremendous potential to be used as artificial bone *** this work,a radially graded lattice structure (RGLS),which mimics the structures of natural human bones,was designed and processed by laser powder bed fusion of martensitic Ti-rich TiNi *** asymmetric tension-compression behaviour,where the compressive strength is significantly higher than the tensile strength,is observed in this Ti-rich TiNi material,which echoes the mechanical behaviour of *** morphologies,mechanical properties,deformation behaviour,and biological compatibility of RGLS samples were characterised and compared with those in the uniform lattice *** the uniform and RGLS samples achieve a relative density higher than 99%.The graded porosities and pore sizes in the RGLS range from 40%-80% and 330-805 µm,respectively,from the centre to the *** chemical etching has significantly removed the harmful partially-melted residual powder particles on the lattice *** compressive yield strength of RGLS is 71.5 MPa,much higher than that of the uniform sample (46.5 MPa),despite having a similar relative density of about 46%.The calculated Gibson-Ashby equation and the deformation behaviour simulation by finite element suggest that the dense outer regions with high load-bearing capability could sustain high applied stress,improving the overall strength of RGLS *** cell proliferation study suggests better biological compatibility of the RGLS than the uniform *** findings highlight a novel strategy to improve the performance of additively manufactured artificial implants by bio-inspiration.