| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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| Presentation Title |
Finding a Fatigue Crack in a Swiss Watch: Fatigue Cracking Kinetics, Detectability, and Defect Criticality in Miniaturized PH13-8Mo Shafts |
| Author(s) |
Christopher Barret Finfrock, Donald Susan, Jeffrey Rodelas, Brian Choragwicki, Hannah Sims, John Laing |
| On-Site Speaker (Planned) |
Christopher Barret Finfrock |
| Abstract Scope |
It is imperative to (i) predict and (ii) detect fatigue cracks in high-consequence structural components. However, because of complexity in both crack initiation/growth phenomena and component design, it is difficult to do either with certainty. Therefore, a combination of application-tailored fatigue testing, defect-criticality modeling, and probability-of-detection analysis is needed when structural integrity is paramount. Here, a multi-disciplinary study is presented which elucidated fatigue performance and crack detectability in miniaturized precision components fabricated from PH13-8Mo stainless steel. The role of an age hardening heat treatment on SN curves was quantified. The efficacy of various nondestructive evaluation (NDE) techniques in detecting flaws was evaluated. Exceedingly small fatigue cracks were intentionally formed to study NDE probabilities-of-detection. Finally, mechanical criticality of fatigue flaws was considered. This broad approach provides a basis for future design decisions and NDE requirements for critical components.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Iron and Steel |