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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advanced Characterization Techniques for Quantifying and Modeling Deformation
Presentation Title Prismatic Slip Induced Interface Sliding in Alpha/Beta Titanium Alloys
Author(s) Zachary T. Kloenne, Stoichko Antonov, Gopal Viswanathan , Michael Loretto, Hamish 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, though these results have been reported far less frequently. More recently, Ti-1Al-4V-0.25Si-0.25Fe-0.15O has been shown to deform through sliding at the alpha/beta interface. Whilst interface sliding appears to be a slip-stimulated event, significant strain gradients were observed in response, thus speculating the presence of GNDs. The nature of these dislocations were studied using a split dislocation density analysis by HR-EBSD. Absolute character of the dislocations involved were confirmed by trace analysis in the TEM. Additionally, the sequence of events, and associated plastic strain, were studied via in-situ straining in the SEM coupled with HRDIC. Interestingly, APT results showed a Si enrichment at the alpha/beta interface. The effect of Si on sliding was studied further.
Proceedings Inclusion? Planned:
Keywords Titanium, Characterization, Mechanical Properties

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