PSI - Issue 39

Jesús Toribio et al. / Procedia Structural Integrity 39 (2022) 488–493 Author name / Procedia Structural Integrity 00 (2021) 000–000

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(a) (b) Fig. 3. Transverse fracture surface (a) and fracture profile ( crack path ) for a wire tested at 0.1 mm/min and –1400 mV SCE.

(a) (b) Fig. 4. Transverse fracture surface (a) and fracture profile ( crack path ) for a wire tested at 0.01 mm/min and –1200 mV SCE.

Therefore, the steel exhibits a locally anisotropic hydrogen embrittlement behaviour with local crack deflections and axial micro-cracking paths . The described crack path deflections do not became a global crack deflection but a sort of stepped macro-crack path (fracture profile or macro-fracture path) depicted in Fig. 5.

F R

4

3

1 2

α 4

α

α 2

3

α 1

IZ + EC

TTS

FPZ

F R

Fig. 5. Scheme of a stepped macro-crack path (fracture profile) after the hydrogen embrittlement test.