About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-96: Effect of Partitioning Treatment on the Mechanical Behavior of an Additively Manufactured Ti-6Al-4V Alloy |
| Author(s) |
Kenta Yamanaka, Manami Mori, Yusuke Onuki, Shigeo Sato, Akihiko Chiba |
| On-Site Speaker (Planned) |
Kenta Yamanaka |
| Abstract Scope |
The quenching and partitioning (Q&P) process, which involves annealing of martensite to produce a large amount of fine austenite, has been developed for multiphase steels with excellent mechanical properties. Here, we applied this concept to additively manufactured Ti-6Al-4V alloys that had experienced a martensitic transformation during the process. Specimens prepared by electron beam melting and were annealed below the ß-transus to partition the alloying elements. The hardness of the as-built specimens decreased significantly at the initial stage of annealing, indicating the influence of dislocations in the as-built state. Interestingly, the annealed materials showed a decreased 0.2% proof stress while showing higher work hardening upon tensile loading. Such a deformation behavior is quite different from that generally observed in Ti-6Al-4V alloys and may be derived from the transformation-induced plasticity. The martensitic transformation kinetics and dislocation dynamics of the materials under tensile loading were examined by in-situ neutron diffraction measurements. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |