About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Effects of Room Temperature Interface Sliding in TIMETAL-407 (Ti-407) |
Author(s) |
Zachary T. Kloenne, Gopal Viswanathan , Stoichko Antonov, Stephen Fox, Michael Loretto, Hamish L Fraser |
On-Site Speaker (Planned) |
Zachary T. Kloenne |
Abstract Scope |
Titanium and its alloys have shown to deform through a combination of dislocation slip and deformation twinning. Grain boundary sliding has also been reported to contribute to the plasticity of CP titanium and Ti-6Al-4V (wt.%, Ti-64) , though these results have been reported far less frequently. More recently, Ti-0.85Al-3.9V-0.25Si-0.25Fe-0.15O (wt.%, Ti-407) has been shown to deform through sliding at the alpha/beta interface. In this work, the effects of interface sliding were investigated using a combination of in-situ SEM, cross-correlation EBSD, atomic force microscopy, and TEM. Primary sliding events were observed at the onset of yield, with secondary events occurring later in the deformation process. Further analysis showed a large plastic strain gradient associated with interface sliding. Interestingly, atom probe tomography and aberration corrected STEM EDS results showed a Si enrichment at the alpha/beta interface. Ti-6Al-2Sn-2Zr-2Mo-2Cr-0.18Si (wt.%, Ti-62222S) was also studied to probe underlying effects Si may have on interface sliding. |
Proceedings Inclusion? |
Planned: |