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 |
Slip-twin Transfer Across Phase Boundaries:
An In-situ Investigation of a Ti-Al-V-Fe (α+β) Alloy
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Author(s) |
Shaolou Wei, Gaoming Zhu, Cem Tasan |
On-Site Speaker (Planned) |
Shaolou Wei |
Abstract Scope |
The predominant role of heterogeneous deformation incipience and its transfer across grain/phase boundaries have been recognized in various macroscopic mechanical responses. Microstructural diversity in two-phase titanium alloys has triggered a profound platform in exploring this sort of micro-plasticity events. While numerous investigations have enriched the fundamentals of slip/twin transfer across grain boundaries, understanding of such responses at phase boundaries has not drawn abundant attention, particularly when α-mechanical twinning can be activated. By integrating in-situ EBSD/SEM testing, crystallographic calculations, and microstructure-based strain mapping approach, we aim to address the following three propositions: (1) could deformation transfer take place in the form between mechanical twinning in the α-phase and dislocation glide in the β-phase? (2) What parameters would be rational to quantify the propensity for the incipience of this event? (3) What micro-mechanical consequences are associated with the slip-twin transfer activity? Broader indications for mechanistically-guided microstructural design will also be discussed. |
Proceedings Inclusion? |
Planned: |