Design of functionally graded materials by selective laser melting
Additive manufacturing has the unique capability of forming materials point by point and layer by layer with spatially varying microstructures. By engineering the microstructure, it is possible to build components with enhanced properties known as Functionally Graded Materials (FGM). FGM can be fabr...
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| Format: | Thesis-Master by Coursework |
| Language: | English |
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Nanyang Technological University
2021
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| Online Access: | https://hdl.handle.net/10356/151412 |
| _version_ | 1811677483314970624 |
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| author | Nair, Adarsh Ravikumaran |
| author2 | Matteo Seita |
| author_facet | Matteo Seita Nair, Adarsh Ravikumaran |
| author_sort | Nair, Adarsh Ravikumaran |
| collection | NTU |
| description | Additive manufacturing has the unique capability of forming materials point by point and layer by layer with spatially varying microstructures. By engineering the microstructure, it is possible to build components with enhanced properties known as Functionally Graded Materials (FGM). FGM can be fabricated in various ways such as mesostructures optimization, alloy composition gradient, nano twinning, or microstructure control. A process parameter study was conducted on selective laser melted 316L to print highly textured blocks (up to 23 times random distribution) with >99% density. The ability to spatially control texture is then demonstrated by printing checkerboard patterns of alternating controlled texture. It was found that additional considerations such as laser penetration depth must be accounted for to print samples with multiple discrete textures. Finally, finite element simulations are included to demonstrate potential applications for controlling deformation in components with site-specific materials properties. |
| first_indexed | 2024-10-01T02:38:05Z |
| format | Thesis-Master by Coursework |
| id | ntu-10356/151412 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:38:05Z |
| publishDate | 2021 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1514122021-06-17T08:08:12Z Design of functionally graded materials by selective laser melting Nair, Adarsh Ravikumaran Matteo Seita School of Mechanical and Aerospace Engineering Technical University of Munich mseita@ntu.edu.sg Engineering::Materials::Functional materials Additive manufacturing has the unique capability of forming materials point by point and layer by layer with spatially varying microstructures. By engineering the microstructure, it is possible to build components with enhanced properties known as Functionally Graded Materials (FGM). FGM can be fabricated in various ways such as mesostructures optimization, alloy composition gradient, nano twinning, or microstructure control. A process parameter study was conducted on selective laser melted 316L to print highly textured blocks (up to 23 times random distribution) with >99% density. The ability to spatially control texture is then demonstrated by printing checkerboard patterns of alternating controlled texture. It was found that additional considerations such as laser penetration depth must be accounted for to print samples with multiple discrete textures. Finally, finite element simulations are included to demonstrate potential applications for controlling deformation in components with site-specific materials properties. Master of Science (Aerospace Engineering) 2021-06-17T08:08:11Z 2021-06-17T08:08:11Z 2021 Thesis-Master by Coursework Nair, A. R. (2021). Design of functionally graded materials by selective laser melting. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/151412 https://hdl.handle.net/10356/151412 en 04MNP001361C160OOE01 application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials::Functional materials Nair, Adarsh Ravikumaran Design of functionally graded materials by selective laser melting |
| title | Design of functionally graded materials by selective laser melting |
| title_full | Design of functionally graded materials by selective laser melting |
| title_fullStr | Design of functionally graded materials by selective laser melting |
| title_full_unstemmed | Design of functionally graded materials by selective laser melting |
| title_short | Design of functionally graded materials by selective laser melting |
| title_sort | design of functionally graded materials by selective laser melting |
| topic | Engineering::Materials::Functional materials |
| url | https://hdl.handle.net/10356/151412 |
| work_keys_str_mv | AT nairadarshravikumaran designoffunctionallygradedmaterialsbyselectivelasermelting |