About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Modeling the Influence of Periodic Overloads and Dwell Holds on Fatigue Behavior in Additively Manufactured Ti-6Al-4V |
| Author(s) |
Venkata Sai Harshit Gaddam, Taylor A Hodes, Krzysztof S Stopka, Michael D Sangid |
| On-Site Speaker (Planned) |
Venkata Sai Harshit Gaddam |
| Abstract Scope |
In order to reliably employ microstructure based lifing approaches, the loading profiles of components need to be extended beyond constant amplitude loading. This work investigates the fatigue performance of additively manufactured Ti-6Al-4V alloy (Ti64) produced by laser powder bed fusion via two variable amplitude loading conditions, i.e., periodic overload and dwell holds. Experimental fatigue tests were first conducted on Ti64 specimens to compare the fatigue response under both the loading types, with differences assessed in terms of cycles to failure and fracture surface characteristics. Additionally, a crystal plasticity finite element (CPFE) model was employed on statistically equivalent virtual microstructures, explicitly capturing the prior β grain boundaries as well as the morphological and orientation relationships of the resulting α lathes. This CPFE model aims to identify the mechanism that explain the experimental findings, highlighting the discrepancies in damage under periodic dwell and overload condition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Titanium, Characterization |