About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Titanium Technology
|
Presentation Title |
Effect of Loading Rate and Applied Potential on the Environment-assisted Cracking Behavior of ST/A Beta-C Titanium Exposed to Marine Environments |
Author(s) |
Zachary D. Harris, James Burns |
On-Site Speaker (Planned) |
Zachary D. Harris |
Abstract Scope |
The influence of the applied electrochemical potential and loading rate (dK/dt) on the environment-assisted cracking (EAC) behavior of solution-treated and aged Beta-C (Ti-8.3V-5.9Cr-4.4Zr-4.1Mo-3.4Al) in 0.6 M NaCl is assessed via a rising stress intensity (K) testing framework. Experiments demonstrate a strong applied potential dependence on the threshold stress intensity (KTH), which reaches a minimum at -800 mV vs. saturated calomel electrode. The effect of dK/dt on the EAC susceptibility at -800 mV is then assessed over dK/dt ranging from 0.25 to 10 MPa√m/hr, which showed that KTH is largely independent of the applied dK/dt. However, comparison of these data with static K experiments (dK/dt = 0) demonstrate that rising K methods yield conservative EAC metrics with increased efficiency, consistent with observations in other alloy systems. These findings are then discussed in the context of current standardized approaches for quantifying EAC susceptibility and the application of such approaches to Ti alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Environmental Effects, Mechanical Properties |