PSI - Issue 2_A

R. Petráš et al. / Procedia Structural Integrity 2 (2016) 3407–3414

3412

6

Author name / Structural Integrity Procedia 00 (2016) 000–000

(a)

(b)

(c)

Fig. 6. FIB cut perpendicular to the surface; (a) cracked and oxidized grain boundary in a IP-TMF specimen; (b) transgranular surface crack with oxide close to the fracture surface (surface is in both cases covered by platinum layer); (c) Starting oxidation and cracking of the grain boundary in high temperature isothermal cyclic loading.

(a) (b) Fig. 7. Longitudinal section of the specimen subjected to IP-TMF cycling; (a) SEM image; (b) EBSD image.