Dresden 2026 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 34: Hydrogen in Materials I

MM 34.1: Talk

Thursday, March 12, 2026, 15:45–16:00, SCH/A215

In-situ mechanical characterization of 316Ti hollow specimens in hydrogen environments - from ambient down to 20 K — •Elvina Gaisina, Simeon Eckerle, Camelia Schulz, Zahra Abbasi, Astrid Pundt, and Klaus-Peter Weiss — Karlsruhe Institute of Technology, Germany

The Application of Liquid Hydrogen (AppLHy) project explores the feasibility of a hybrid pipeline system transporting liquid hydrogen while simultaneously using the cold enables superconducting electrical energy transmission. Developing such a system requires a reliable understanding of material behavior under cryogenic conditions and exposure to hydrogen environments. However, conventional test setups that simulate these conditions are often large, complex, and require extensive safety measures to prevent hydrogen leakage. To provide a safer and more efficient testing method, this study presents an in-situ mechanical testing approach using hollow cylindrical specimens pressurized with gas. Austenitic stainless steel 316Ti, a widely applied cryogenic compatible material, was selected for testing. The hollow specimens were filled with hydrogen or helium at pressures up to 200 bar and subjected to tensile loading at temperatures ranging from ambient down to 20 K. The results show that some hydrogen-induced effects become noticeable primarily after substantial plastic deformation. Significant changes in mechanical properties and fracture behavior are observed only at 200 K.

Keywords: Hollow specimen technique; Hydrogen embrittlement; Cryogenic deformation; Mechanical characterization; Fractographic analysis