Analysis on Fracture Toughness of the L360QS/N08825 Bimetallic Composite Pipe Welded Joint

Table 3

CTOD values and parameters of specimens of L360QS/N08825 welded joint (20°C).

Samples	Crack location	Mechanical properties	Thickness B (mm)	Width W (mm)	Crack length a0 (mm)	a0/W	CTOD value δm (mm)	Average value −δm (mm)
W1	Weld	σs = 370 MPa	19.82	39.88	21.55	0.54	1.2739	1.3232
W2		E = 2.1 × 10^5 MPa	19.98	39.90	20.59	0.52	1.4935
W3		µ = 0.3	19.96	39.98	21.02	0.53	1.2022
H1	HAZ	σs = 370 MPa	19.94	19.91	4.21	0.21	2.4457	1.5119
H2		E = 2.1 × 10^5 MPa	19.96	19.94	3.36	0.17	0.9787
H3		µ = 0.3	19.92	19.85	3.77	0.19	1.1113