About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
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Presentation Title |
High Speed In-situ Alloying of Ti34Nb via Laser Powder Bed Fusion |
Author(s) |
Sheng Huang, R. Lakshmi Narayan, Joel Heang Kuan Tan, Swee Leong Sing, Wai Yee Yeong |
On-Site Speaker (Planned) |
Sheng Huang |
Abstract Scope |
Research on in-situ alloyed Ti alloys with biocompatible β stabilizer(s) manufactured via Laser Powder Bed Fusion has been trending due to the need of compositional optimization. However, the β-stabilizers consist mostly of refractory metals which has led to the issue of porosity-inclusion tradeoff. Combining top-hat laser profile and tailored scanning path along with high power high speed scan, unique melt pool that travels perpendicularly to the laser scan direction was created and enabled pore-free in-situ alloyed Ti34Nb with significantly reduced un-melted Nb inclusions. {100} fiber texture was also achieved, which has the ideal combination of strength and elastic modulus. With the support of simple thermal finite element analysis, Kurz-Giovanola-Trivedi model and experimental validations, the “stray” grains formation is explained. These findings can be extended to other powder-mix systems, expanding the conventional belief of processing window and offering a new dimension for rapid compositional prototyping. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Biomaterials |