PSI - Issue 68

Birhan Sefer et al. / Procedia Structural Integrity 68 (2025) 1121–1128 Sefer et al. / Structural Integrity Procedia 00 (2025) 000–000

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elongation at room as compared to high temperature. The most important observation is however that neither hot rolled or AM materials showed any degradation of the mechanical properties due to hydrogen at both temperatures.

Figure 1. Representative stress-strain curves obtained by SSRT for hot rolled Hastelloy X in 200 bar hydrogen and argon a) at room temperature and b) at 800⁰C.

Figure 2. Representative stress-strain curves obtained by SSRT for AM Hastelloy X in 200 bar hydrogen and argon a) at room temperature and b) at 800⁰C.