| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Dilute Alloying and Impurity Effects on Phase Transformations
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| Presentation Title |
In-situ Formation of Lamellar α+β Ti Alloys with Dilute Fast Diffusive Elements |
| Author(s) |
Takuma Teramae, Ammarueda Issariyapat, Shota Kariya, Junko Umeda, Katsuyoshi Kondoh |
| On-Site Speaker (Planned) |
Takuma Teramae |
| Abstract Scope |
Laser powder bed fusion (PBF-LB) has been used to produce α+β titanium (Ti) alloys, such as Ti-6Al-4V. Nevertheless, these materials typically consist of supersaturated α' martensite, rather than the desired α+β phases. This often leads to poor ductility and low toughness. The α' martensite can be decomposed into α+β phases in the PBF-LB process by adjusting building parameters, such as stage temperature and laser focus offset. However, these parameters are not always adjustable in general PBF-LB machines. Considering that this decomposition is ruled by the diffusion of solutes, the present study aims to evaluate the feasibility of promoting the in-situ formation of α+β phases using minor amounts of fast diffusive elements, such as Mn. Ti-Mn alloys and Ti-6Al-4V were fabricated using PBF-LB with various laser parameters. The microstructures and phase compositions were characterized using several microscopy techniques, and their mechanical properties were evaluated through tensile testing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Other |