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MM: Fachverband Metall- und Materialphysik

MM 27: Hydrogen in Materials

MM 27.9: Talk

Wednesday, March 29, 2023, 12:30–12:45, SCH A 215

Mechanism-based Lifetime Assessment under the Influence of Hydrogen — •Fabien Ebling1,2, Heiner Oesterlin2, Astrid Pundt1, and Ken Wackermann21Karlsruhe Institute of Technology (KIT) Institute for Applied Materials - Materials Science and Engineering (IAM-WK), Karlsruhe, Germany — 2Fraunhofer Institute for Mechanics of Materials IWM, Freiburg, Germany

Components see a variety of mechanical and thermal loads during service. Increased damage can occur when used in a hydrogen atmosphere. The experimental investigation of all states is very time-consuming and expensive, especially for testing under hydrogen influence. Mechanism-based lifetime assessments can be used to model crack growth and predict service life. This can significantly reduce the need of experimental investigations for a safe design of components. This work discusses different approaches of modeling hydrogen assisted cracking and presents an adaptation of the ZD parameter according to Heitmann (1983) for the influence of hydrogen at different temperatures.

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