Development of (TiB + TiN)/Ti composites via selective laser melting
Particle-reinforced titanium matrix composites have undergone a transition in their application with growing interest in aerospace, automotive and biomedical sectors due to their innate mechanical properties of high strength, wear resistance and good biocompatibility. In this study, the (TiB + TiN)-...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2020
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| Online Access: | https://hdl.handle.net/10356/141106 |
| _version_ | 1811697144066736128 |
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| author | Koh, Benjamin Jia Yuan |
| author2 | Zhou Kun |
| author_facet | Zhou Kun Koh, Benjamin Jia Yuan |
| author_sort | Koh, Benjamin Jia Yuan |
| collection | NTU |
| description | Particle-reinforced titanium matrix composites have undergone a transition in their application with growing interest in aerospace, automotive and biomedical sectors due to their innate mechanical properties of high strength, wear resistance and good biocompatibility. In this study, the (TiB + TiN)-reinforced titanium matrix composites were in situ fabricated via selective laser melting. The formula of BN and Ti powders for the printed composites was optimized, and then the effects of process parameters on the microstructure and mechanical properties of (TiB + TiN)/Ti composites were investigated. Composite powders of the BN contents of 0, 0.5, 1, 2 and 3 wt% were prepared through mechanical blending after which the powder morphology, phase identification, microstructural features and mechanical properties were analysed. The results showed that whisker-like TiB and granular TiN were in situ formed during SLM. The tensile strength and microhardness of the titanium matrix were significantly improved with the addition of 0.5 wt% BN from 592.87 MPa to 1100.03 MPa and 172.74 HV to 315.64 HV respectively. The process optimization exhibited a wide processing window for the (TiB + TiN)/Ti composites with similar mechanical properties, indicating the greater sensitivity of composition to mechanical properties than process parameters. Fractography of the composites shown a transition of ductile fracture to brittle fracture with the addition of the BN reinforcement. |
| first_indexed | 2024-10-01T07:50:35Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/141106 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:50:35Z |
| publishDate | 2020 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1411062023-03-04T19:38:29Z Development of (TiB + TiN)/Ti composites via selective laser melting Koh, Benjamin Jia Yuan Zhou Kun School of Mechanical and Aerospace Engineering kzhou@ntu.edu.sg Engineering::Mechanical engineering Engineering::Materials::Composite materials Particle-reinforced titanium matrix composites have undergone a transition in their application with growing interest in aerospace, automotive and biomedical sectors due to their innate mechanical properties of high strength, wear resistance and good biocompatibility. In this study, the (TiB + TiN)-reinforced titanium matrix composites were in situ fabricated via selective laser melting. The formula of BN and Ti powders for the printed composites was optimized, and then the effects of process parameters on the microstructure and mechanical properties of (TiB + TiN)/Ti composites were investigated. Composite powders of the BN contents of 0, 0.5, 1, 2 and 3 wt% were prepared through mechanical blending after which the powder morphology, phase identification, microstructural features and mechanical properties were analysed. The results showed that whisker-like TiB and granular TiN were in situ formed during SLM. The tensile strength and microhardness of the titanium matrix were significantly improved with the addition of 0.5 wt% BN from 592.87 MPa to 1100.03 MPa and 172.74 HV to 315.64 HV respectively. The process optimization exhibited a wide processing window for the (TiB + TiN)/Ti composites with similar mechanical properties, indicating the greater sensitivity of composition to mechanical properties than process parameters. Fractography of the composites shown a transition of ductile fracture to brittle fracture with the addition of the BN reinforcement. Bachelor of Engineering (Mechanical Engineering) 2020-06-04T02:51:24Z 2020-06-04T02:51:24Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/141106 en B272 application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Mechanical engineering Engineering::Materials::Composite materials Koh, Benjamin Jia Yuan Development of (TiB + TiN)/Ti composites via selective laser melting |
| title | Development of (TiB + TiN)/Ti composites via selective laser melting |
| title_full | Development of (TiB + TiN)/Ti composites via selective laser melting |
| title_fullStr | Development of (TiB + TiN)/Ti composites via selective laser melting |
| title_full_unstemmed | Development of (TiB + TiN)/Ti composites via selective laser melting |
| title_short | Development of (TiB + TiN)/Ti composites via selective laser melting |
| title_sort | development of tib tin ti composites via selective laser melting |
| topic | Engineering::Mechanical engineering Engineering::Materials::Composite materials |
| url | https://hdl.handle.net/10356/141106 |
| work_keys_str_mv | AT kohbenjaminjiayuan developmentoftibtinticompositesviaselectivelasermelting |