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 |
Probing the Origin of Superelasticity in Metastable Beta Ti-Alloy Using In-situ Synchrotron Diffraction |
Author(s) |
Peter Ibrahim, Peter Ibrahim, Peter Ibrahim, Peter Ibrahim, Konstantinos Liogas, Richard J Moat, Alexander Korsunsky, Moataz M. Attallah |
On-Site Speaker (Planned) |
Peter Ibrahim, Peter Ibrahim, Peter Ibrahim, Peter Ibrahim |
Abstract Scope |
The lattice strain evolution during in-situ tensile loading of a metastable superelastic β titanium alloy (TiNbTaZr) fabricated using laser powder bed fusion was studied using in-situ synchrotron x-ray diffraction to investigate different condition; as-fabricated, solution treated, and solution-treated+aged (ST+A). The conditions demonstrated significantly different mechanical properties, in particular the elastic modulus. The role of the micro-segregation on the lattice elastic modulus was also explored. Results show that the superelastic behaviour was not associated with a strain-induced phase transformation, with all conditions showing lack of phase transformations throughout tensile loading to failure. The presence of α in the ST+A condition improved the load bearing capability of the alloy, as a result of strain partitioning to the α-phase beyond the β-phase yield point. Further correlations on the influence of the microstructure on dislocation formation was also studied. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Titanium |