About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Modeling fatigue crack initiation and propagation life in additively manufactured alloys across fatigue regimes |
Author(s) |
Krzysztof S. Stopka, Michael Sangid |
On-Site Speaker (Planned) |
Krzysztof S. Stopka |
Abstract Scope |
Additive manufacturing (AM) offers significant opportunities for reducing component weight while enabling complex component shapes. However, widespread implementation of AM components relies on our ability to model and predict their fatigue resistance. This talk will discuss a microstructure-sensitive crystal plasticity modeling framework to predict fatigue life of AM alloys across fatigue regimes. Fatigue models typically employ metrics appropriate solely for fatigue crack initiation life, but which are calibrated with and compared to total fatigue life. In this work, fatigue test data of AM Ni-based superalloy 718 specimens across more than three orders of fatigue life was decomposed into crack initiation and propagation lives and incorporated into the modeling framework. Additionally, variability in fatigue response and probability of failure was assessed between experiments and digital microstructure models at several distinct loading conditions. The results demonstrate improved fatigue life predictions and appropriate methods to calibrate such models. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Modeling and Simulation, |