| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
On the Evolution of Adiabatic Shear Bands in the Beta Titanium Alloy Ti-10V-2Fe-3Al |
| Author(s) |
Mario Scholze, Philipp Frint, Sven Winter, Martin F.-X. Wagner |
| On-Site Speaker (Planned) |
Mario Scholze |
| Abstract Scope |
We investigate the evolution of (quasi-)adiabatic shear bands in a Ti-10V-2Fe-3Al alloy with different initial microstructures: solution-annealed β-titanium, β-titanium with primary α precipitates as well as a condition with primary and secondary α precipitates. Dynamic testing of cyclindrical shear-compression specimens with strain rates up to 103 s-1 is performed at room temperature. The nominal deformation is limited to predefined strains, which allows to investigate nucleation and propagation of the shear bands using electron microscopy. Our post mortem observations show that the formation mechanisms of (quasi-)adiabatic shear bands differ considerably between the different material conditions. In β-titanium with primary α-phase, massive bands with a thickness of 5 μm are formed. In contrast, β-titanium with primary as well as secondary α precipitates exhibits many fine, branching shear bands. Our experimental observations contribute to an in-depth micromechanical understanding of the effect of microstructural features on the formation and growth of adiabatic shear bands. |
| Proceedings Inclusion? |
Undecided |