Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method
This paper investigates the effect of designs and process parameters on the dimensional accuracy and compressive behavior of cellular lattice structures fabricated using selective laser melting (SLM). Two unit cell types, square pyramid and truncated cube & octahedron from the Computer Aided Sys...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/87553 http://hdl.handle.net/10220/44489 |
| _version_ | 1826114639076786176 |
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| author | Sing, Swee Leong Yeong, Wai Yee Wiria, Florencia Edith Tay, B. Y. |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Sing, Swee Leong Yeong, Wai Yee Wiria, Florencia Edith Tay, B. Y. |
| author_sort | Sing, Swee Leong |
| collection | NTU |
| description | This paper investigates the effect of designs and process parameters on the dimensional accuracy and compressive behavior of cellular lattice structures fabricated using selective laser melting (SLM). Two unit cell types, square pyramid and truncated cube & octahedron from the Computer Aided System for Tissue Scaffolds (CASTS), an in-house developed library system were used. Powder adhesions occur on the struts of the lattice structures. The thickness of powder adhesion on the struts decreases with an increase in laser power or laser scan speed. The elastic constant in compression of the lattice structures increases with an increase in relative density, and ranged from 7.93 ± 2.73 MPa to 7.36 ± 0.26 GPa. Analysis of Variance (ANOVA) is also carried out to determine the significance of various process and design parameters on the dimensional accuracy and compressive strength of the lattice structures. The processing parameters, such as laser power and laser scan speed have no significant effect on the elastic constant but have a significant effect on the powder adhesion on the struts, which in turn, affects the dimensional accuracy. However, geometrical design parameters such as unit cell type and strut diameter have significant effects on the elastic constant but not dimensional accuracy of the lattice structures. |
| first_indexed | 2024-10-01T03:42:25Z |
| format | Journal Article |
| id | ntu-10356/87553 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:42:25Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/875532020-03-07T12:47:08Z Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method Sing, Swee Leong Yeong, Wai Yee Wiria, Florencia Edith Tay, B. Y. School of Mechanical and Aerospace Engineering A*STAR SIMTech Singapore Centre for 3D Printing Additive Manufacturing 3D Printing This paper investigates the effect of designs and process parameters on the dimensional accuracy and compressive behavior of cellular lattice structures fabricated using selective laser melting (SLM). Two unit cell types, square pyramid and truncated cube & octahedron from the Computer Aided System for Tissue Scaffolds (CASTS), an in-house developed library system were used. Powder adhesions occur on the struts of the lattice structures. The thickness of powder adhesion on the struts decreases with an increase in laser power or laser scan speed. The elastic constant in compression of the lattice structures increases with an increase in relative density, and ranged from 7.93 ± 2.73 MPa to 7.36 ± 0.26 GPa. Analysis of Variance (ANOVA) is also carried out to determine the significance of various process and design parameters on the dimensional accuracy and compressive strength of the lattice structures. The processing parameters, such as laser power and laser scan speed have no significant effect on the elastic constant but have a significant effect on the powder adhesion on the struts, which in turn, affects the dimensional accuracy. However, geometrical design parameters such as unit cell type and strut diameter have significant effects on the elastic constant but not dimensional accuracy of the lattice structures. 2018-03-02T08:25:00Z 2019-12-06T16:44:23Z 2018-03-02T08:25:00Z 2019-12-06T16:44:23Z 2016 2016 Journal Article Sing, S. L., Yeong, W. Y., Wiria, F. E., & Tay, B. Y. (2016). Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method. Experimental Mechanics, 56(5), 735–748. 0014-4851 https://hdl.handle.net/10356/87553 http://hdl.handle.net/10220/44489 10.1007/s11340-015-0117-y 189093 en Experimental Mechanics © 2018 Society for Experimental Mechanics. |
| spellingShingle | Additive Manufacturing 3D Printing Sing, Swee Leong Yeong, Wai Yee Wiria, Florencia Edith Tay, B. Y. Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method |
| title | Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method |
| title_full | Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method |
| title_fullStr | Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method |
| title_full_unstemmed | Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method |
| title_short | Characterization of Titanium Lattice Structures Fabricated by Selective Laser Melting Using an Adapted Compressive Test Method |
| title_sort | characterization of titanium lattice structures fabricated by selective laser melting using an adapted compressive test method |
| topic | Additive Manufacturing 3D Printing |
| url | https://hdl.handle.net/10356/87553 http://hdl.handle.net/10220/44489 |
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