PSI - Issue 75

KADIRI Mounir et al. / Procedia Structural Integrity 75 (2025) 633–641 KADIRI Mounir/ Structural Integrity Procedia (2025)

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Figure 7 : temperature rise curves for studied material in different configurations

3.2. Comparison of self-heating curves: base material vs charged coated material vs uncharged coated material Three configurations were compared to identify the respective contributions of the coating and hydrogen charging on the material’s self -heating (Figure 8). First, a notable difference is observed between the self-heating curve of the base material and the self- heating curve of the uncharged coated material, indicating that the coating’s energy dissipation is very significant. This phenomenon is likely related to the highly ductile behavior of the coating, which undergo plastic deformation during cyclic loading, whereas the base material remains within its macroscopic elastic domain. Also, the Figure 8 also shows self-heating curve of the hydrogen charged coated material is closer to self-heating curve of the uncharged coated material than to that of the base material, which indicates a predominant effect of the coating on energy dissipation. Nevertheless, these results demonstrate that despite the coating’s dissipative effect, the influence of hydrogen on the self-heating curve remains significant, which confirm that hydrogen affects the dissipation of energy by the material under cyclic loading.