Figure 7

Fracture cross-section characteristic for the creep ruptured specimens tested at: (a,b) 550 °C/130 MPa, tr = 1598 h, (c,d) 575 °C/100 MPa, tr = 1550 h, (e,f) 600 °C/95 MPa, tr = 767 h, (g,h) 600 °C/105 MPa, tr = 116 h.

Fracture cross-section characteristic for the creep ruptured specimens tested at: (a,b) 550 °C/130 MPa, tr = 1598 h, (c,d) 575 °C/100 MPa, tr = 1550 h, (e,f) 600 °C/95 MPa, tr = 767 h, (g,h) 600 °C/105 MPa, tr = 116 h.