In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy
Meta-stable β titanium alloys that feature excellent mechanical properties are of great interest for a range of engineering applications. In particular, Fe containing titanium alloy is one of the most promising alloy systems because Fe is the most economic β stabilizer. However, Fe solute is highly...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424001546 |
| _version_ | 1797247876182573056 |
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| author | Dongze Chen Raj Das Shenglu Lu Ma Qian Dong Qiu |
| author_facet | Dongze Chen Raj Das Shenglu Lu Ma Qian Dong Qiu |
| author_sort | Dongze Chen |
| collection | DOAJ |
| description | Meta-stable β titanium alloys that feature excellent mechanical properties are of great interest for a range of engineering applications. In particular, Fe containing titanium alloy is one of the most promising alloy systems because Fe is the most economic β stabilizer. However, Fe solute is highly prone to segregation during casting, which leads to the formation of “β flecks” in the subsequent thermo-mechanical treatment and deteriorates the fatigue properties. This paper aims to eliminate β flecks in Ti-3.5 wt%Fe alloy fabricated by Laser Directed Energy Deposition (L-DED), that utilises the high cooling rate during solidification and multiple thermal cycles after solidification. SEM and EDS analysis established that a large β-fleck free zone can be achieved in as-fabricated Ti-3.5 wt%Fe thin-walled samples. Combining the finite element temperature field simulation results and the one-dimensional dynamic diffusion model, the elimination of β flecks is well rationalized. The current work provides a paradigm to evaluate the segregation elimination in the additively manufactured alloy components. |
| first_indexed | 2024-03-08T11:42:28Z |
| format | Article |
| id | doaj.art-6e76dacbd67c479d98a95b6fb893cce8 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:39Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-6e76dacbd67c479d98a95b6fb893cce82024-03-24T06:57:26ZengElsevierJournal of Materials Research and Technology2238-78542024-03-0129839850In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloyDongze Chen0Raj Das1Shenglu Lu2Ma Qian3Dong Qiu4Center for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaCenter for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaCenter for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaCenter for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaCorresponding author.; Center for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC 3000, AustraliaMeta-stable β titanium alloys that feature excellent mechanical properties are of great interest for a range of engineering applications. In particular, Fe containing titanium alloy is one of the most promising alloy systems because Fe is the most economic β stabilizer. However, Fe solute is highly prone to segregation during casting, which leads to the formation of “β flecks” in the subsequent thermo-mechanical treatment and deteriorates the fatigue properties. This paper aims to eliminate β flecks in Ti-3.5 wt%Fe alloy fabricated by Laser Directed Energy Deposition (L-DED), that utilises the high cooling rate during solidification and multiple thermal cycles after solidification. SEM and EDS analysis established that a large β-fleck free zone can be achieved in as-fabricated Ti-3.5 wt%Fe thin-walled samples. Combining the finite element temperature field simulation results and the one-dimensional dynamic diffusion model, the elimination of β flecks is well rationalized. The current work provides a paradigm to evaluate the segregation elimination in the additively manufactured alloy components.http://www.sciencedirect.com/science/article/pii/S2238785424001546SegregationTitanium alloysLaser directed energy deposition (L-DED)Finite element simulationβ flecks |
| spellingShingle | Dongze Chen Raj Das Shenglu Lu Ma Qian Dong Qiu In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy Journal of Materials Research and Technology Segregation Titanium alloys Laser directed energy deposition (L-DED) Finite element simulation β flecks |
| title | In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy |
| title_full | In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy |
| title_fullStr | In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy |
| title_full_unstemmed | In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy |
| title_short | In-situ elimination of β-flecks in additively manufactured Ti-3.5 wt% Fe alloy |
| title_sort | in situ elimination of β flecks in additively manufactured ti 3 5 wt fe alloy |
| topic | Segregation Titanium alloys Laser directed energy deposition (L-DED) Finite element simulation β flecks |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424001546 |
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