About this Abstract |
Meeting |
2020 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
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Presentation Title |
Observing the Phase Evolution During Selective Laser Melting of a High-Fe β-Ti Alloy from Elemental Powders via In-Situ Synchrotron X-Ray Diffraction |
Author(s) |
Farheen Fathima Ahmed, Samuel Clark, Chu Lun Alex Leung, Yunhui Chen, Lorna Sinclair, Sebastian Marussi, Veijo Honkimaki, Noel Haynes, Peter Lee, Hatem Zurob, André Phillion |
On-Site Speaker (Planned) |
Farheen Fathima Ahmed |
Abstract Scope |
Fe is a low-cost alloying element for β-Ti alloys, which have high tensile and fatigue strengths. However, the low cooling rates during casting cause Fe-rich precipitates known as β-flecks to develop during solidification. Using Selective Laser Melting (SLM), one can produce high-Fe β-Ti alloys free of β-flecks as the rapid solidification rates constrain Fe segregation. To design an optimal production route of high-Fe β-Ti alloys, the phase transformation sequence during printing must first be understood. In this study, real-time synchrotron X-Ray Diffraction was employed to characterize phase transformations during the SLM of a high-Fe β-Ti alloy. Infrared images were collected concurrently and converted to temperature. Temperature profiles were matched with the identified XRD peaks to determine the phase evolution. To further reduce costs, elemental powders rather than a pre-alloyed powder were utilized as the starting material. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |