PSI - Issue 60

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Gopal Sanyal et al. / Procedia Structural Integrity 60 (2024) 311–323 Author name / StructuralIntegrity Procedia 00 (2019) 000–000

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Figure 5 Bar chart comparing the reduction of area in air and in in-situ experiment with current density of 20, 40 and 400 mA/cm 2 . The HE susceptibility index is also shown.

The corresponding SEM fractographs have been shownin Fig.6. For the sample tested in air, the fracture appearance is typically ductile consisting of huge number of dimples.In case of in-situ tested sample, the fracture is clearly brittle intergranular failure.Thus, the loss of tensile ductility is concluded to be due to a change in mode of failure from ductile micro void coalescence to brittle intergranular and quasi-cleavage mode of fracture.

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