Ageing Effects on Microstructure, Mechanical Properties, and Fracture Behaviour of 9Cr-1.5Mo-1Co-VNbBN Martensitic Steel Welded Joint for High Temperature Application

Figure 18

Bright field TEM images of CB2 BM substructure in initial PWHT state (a) and after the creep test at 625°C, 80 MPa for 18864 h of the preaged (625°C/30 kh) material (b).

(a)

(b)