Saiful Anwar, Che Ghani and Siti Rohaida, Mohamed and Munirah, Sha’ban and W. S., Wan Harun and Nor Aida Zuraimi, Md Noar (2020) Experimental investigation of biological and mechanical properties of CoCrMo based selective laser melted metamaterials for bone implant manufacturing. Procedia CIRP, 89. pp. 79-91. ISSN 2212-8271. (Published)
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Abstract
Metamaterials are composed of structural elements and their properties are derived mainly from the inner structure of the elements, rather than the properties of their constituent material. In this study, mechanical and biological properties of metamaterial made by selective laser melted cobalt chrome molybdenum (CoCrMo) were studied. Metamaterials of diamond and square shapes unit cells with 1.5–2.5 mm strut length and 0.4–0.6 mm strut thickness was prepared by layer-by-layer additive manufacturing technique. The metamaterials demonstrated excellent biological property under MTT assay cytotoxicity after 14 days cell cultured. Comparisons of the experimental data between two unit cell types made by compression tests exhibited that the stiffness of square shape is always higher 20% than those of diamond type, nonetheless all the tested materials satisfy the young’s modulus of human cancellous bone. Furthermore, the compression tests also resulted in determining both unit cell types with strut thickness 0.6 mm and strut length 1.5 mm to meet the compressive strength of human cortical bone. The tailored metamaterials by modifying the unit cell sizes and shapes of fabricated bone implant can be achieved by using additive manufacturing technique. The design concepts of internal structures by determining the properties of metamaterials demonstrated in this study will be valuable in future biomedical applications.
| Item Type: | Article |
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| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Metamaterials; Mechanical properties; Biological properties; Orthopaedic implants; Additive manufacturing |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
| Faculty/Division: | Faculty of Industrial Sciences And Technology Institute of Postgraduate Studies Faculty of Mechanical and Automotive Engineering Technology |
| Depositing User: | Mrs Norsaini Abdul Samat |
| Date Deposited: | 15 Dec 2020 01:50 |
| Last Modified: | 15 Dec 2020 01:50 |
| URI: | http://umpir.ump.edu.my/id/eprint/30213 |
| Download Statistic: | View Download Statistics |
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