About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques III
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Presentation Title |
Time-Resolved Investigation of Martensite Decomposition in Ti-6Al-4V Using In-Situ Synchrotron X-Ray Diffraction |
Author(s) |
Seunghee Oh, Joseph Aroh, Andrew Chuang, Nicholas Lamprinakos, Ashley Bucsek, Robert Suter, Anthony Rollett |
On-Site Speaker (Planned) |
Seunghee Oh |
Abstract Scope |
Ti-6Al-4V (Ti64) is a widely studied α+β titanium alloy renowned for its outstanding properties. The presence of the martensite phase, α', formed during rapid cooling from the high-temperature phase, β, influences the strength and ductility of Ti64 components. Martensite decomposition, where α' transforms into α+β, is a common method to optimize mechanical properties of martensitic Ti64, but it has not been characterized due to the similarity in crystal structure between α and α' (HCP). This study focuses on martensitic and non-martensitic specimens fabricated using a Laser Powder Bed Fusion (LPBF) system. The LPBF as-printed Ti64 presents a highly martensitic microstructure due to the rapid cooling, which can be decomposed through annealing. Employing in-situ synchrotron X-ray diffraction with high spatial and temporal resolution, we investigate the progression of martensite decomposition during rapid heating. The time-resolved investigations on diffraction profiles yield valuable insights into the details of martensite decomposition during rapid heating. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Characterization, Titanium |