About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Refractory Metals 2024
|
Presentation Title |
High-throughput Characterization of Dynamic Tensile Failure in Pure Niobium and Niobium-titanium Alloy |
Author(s) |
Arezoo Zare, Jacob Diamond, K.T. Ramesh |
On-Site Speaker (Planned) |
Arezoo Zare |
Abstract Scope |
Niobium and its alloys offer a unique combination of high melting temperature (>2400 °C) and desirable ductility which makes them candid for applications under extreme thermomechanical environments. Despite this potential, our understanding of the dynamic and shock-induced mechanical response of these materials and the underlying deformation mechanisms remains limited. Herein, we characterize the shock-induced tensile failure (spall failure) of pure niobium and equiatomic niobium-titanium at strain rates of 10<Sup>5</Sup> – 10<Sup>6</Sup> s<Sup>-1</Sup> using novel high-throughput laser-driven micro-flyer impact experiments. By conducting tests over a range of impact velocities, we observe the full range of behaviors from incipient spall to complete spall failure and study the correlations between the spall strength and peak shock stress. Post-mortem characterization of the impact sites shows a mixed mode failure with ductile void growth and coalescence followed by brittle separation. Efforts are currently underway to clarify the links between the observed failure mechanisms and microstructure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Titanium, Other |