About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
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Presentation Title |
Precipitation Strengthening Mechanism of a Ti-based Alloy Manufactured by Electron Beam Melting |
Author(s) |
Yujie Cui, Kenta Aoyagi, Kenta Yamanaka, Tadashi Fujieda, Akihiko Chiba |
On-Site Speaker (Planned) |
Yujie Cui |
Abstract Scope |
Although TiB particles possess good mechanical properties and high thermal stability, the precipitation strengthening effect of TiB particles is limited in the Ti-based alloys fabricated by conventional casting owing to the large size of TiB particles.
Herein, the microstructure and mechanical properties of Ti-based alloys with boron addition fabricated by electron beam powder bed fusion (EB-PBF) were investigated. Compared with Ti-based alloys fabricated by conventionally casting or forging, the TiB particles was significantly refined in the alloy manufactured by EB-PBF. We verified that high cooling rate and solute segregation in the interface between TiB particle and matrix mainly accounted for the refinement of TiB precipitates.
The Orowan strengthening and load-bearing strengthening caused by refined TiB particles mainly contributed to the enhanced strength of Ti-based alloy manufactured by EB-PBF. The research provides references for the manufacturing of materials strengthened by refined precipitates using additive manufacturing methods. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Characterization |