Study on Deterioration Characteristics of Low-Carbon Steel’s Mechanical Properties and Fracture Mechanism under Marine Engineering Environment

Table 3

Crack dimensions and fracture toughness of low-carbon steel under different conditions.

c (%)	σa (MPa)	a (mm)	a/R	F	K (MPa·m^−1/2)
20	0	0.122	0.0244	1.124	373.98
	80	0.130	0.0260	1.125	373.17
	160	0.157	0.0314	1.125	373.81
	240	0.224	0.0448	1.127	373.24
40	0	0.126	0.0252	1.124	370.52
	80	0.144	0.0288	1.125	369.72
	160	0.185	0.0370	1.126	369.98
	240	0.247	0.0494	1.127	369.84
60	0	0.138	0.0276	1.125	364.67
	80	0.176	0.0352	1.126	364.57
	160	0.219	0.0438	1.127	364.42
	240	0.263	0.0526	1.128	364.77
80	0	0.146	0.0292	1.125	357.28
	80	0.204	0.0408	1.126	357.08
	160	0.248	0.0496	1.127	356.93
	240	0.324	0.0648	1.129	357.22