About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interstitial–Metal Interactions: The Outsized Role of Small Atoms
|
| Presentation Title |
Effects of Heat Treatment and Hydrogen Exposure on Fracture Resistance and Fatigue Crack Growth in 15-5 PH Stainless Steel |
| Author(s) |
Joseph Ronevich, Chris San Marchi |
| On-Site Speaker (Planned) |
Joseph Ronevich |
| Abstract Scope |
15-5 PH martensitic stainless steel was evaluated to determine how heat treatment, microstructure and hydrogen exposure affect fracture resistance and fatigue crack growth. Three heat treatments (H1100, H1150D, H1150M) produced martensitic microstructures with varying reverted austenite fractions, which influenced hydrogen uptake during thermal precharging. Hydrogen precharging modestly increased strength but caused severe ductility loss in all conditions. Fracture resistance in gaseous hydrogen decreased by more than 80% relative to air, with the highest-strength H1100 condition showing the greatest susceptibility. Fatigue crack growth rates were accelerated by more than an order of magnitude in hydrogen, with stronger effects at higher pressure. The H1150M heat treated condition was subjected to different hydrogen precharging conditions to introduce varying levels of internal hydrogen followed by FCGR and fracture testing. Overall, 15-5 PH exhibited severe hydrogen embrittlement across all heat treatments, with both internal and external hydrogen contributing to degraded performance |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Mechanical Properties, |