| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Effect of Microtexture on Minimum Dwell Fatigue Life of Ti-6Al-4V |
| Author(s) |
Sushant K. Jha, Daniel Sparkman, James M Larsen, Reji John, Adam L Pilchak |
| On-Site Speaker (Planned) |
Sushant K. Jha |
| Abstract Scope |
Near-alpha and alpha+beta titanium alloys exhibit significant debit in life under dwell fatigue loading compared to cyclic fatigue when containing microtextured regions (MTRs). The debit in life has been attributed to early initiation and faster small-crack growth through suitably oriented MTRs, via a faceted crack growth mechanism. In addition to size, density of similarly oriented grains, and crystallographic orientation, the spatial distribution of suitably oriented MTRs is a key factor affecting the distribution in dwell fatigue life. A probabilistic model that captures the effect of spatial distribution of MTRs along with other key MTR variables on the distribution in life was developed. In order to account for the spatial distribution of MTRs, a pluri-Gaussian random field model was used to generate statistically representative instantiations of MTR microstructure. The effect of MTR variables on debit in minimum dwell fatigue life was studied and compared to experimental results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Modeling and Simulation, Mechanical Properties |