Mechanism and Method of Testing Fracture Toughness and Impact Absorbed Energy of Ductile Metals by Spherical Indentation Tests

Chinese Journal of Mechanical Engineering

Table 5 Comparison of K_ICP and K_ICM, with K_ICT

Material	No.	Mode I fracture test	Previous CIE model			Modified CIE model
Material	No.	K_ICT (MPa∙m^0.5)	h_c (mm)	K_ICP (MPa∙m^0.5)	\(\frac{{K_{{{\text{ICP}}}} - K_{{{\text{ICT}}}} }}{{K_{{{\text{ICT}}}} }}\) (%)	h_c (mm)	K_ICM (MPa∙m^0.5)	\(\frac{{K_{{{\text{ICM}}}} - K_{{{\text{ICT}}}} }}{{K_{{{\text{ICT}}}} }}\)(%)
S30408	1	152.33	0.097	183.41	20.40	0.063	144.27	5.29
S30408	2	152.33	0.151	231.27	51.82	0.064	147.80	– 2.97
SA508-3	1	171.13	0.098	231.14	35.07	0.057	175.9	2.78
SA508-3	2	171.13	0.101	235.45	37.58	0.051	165.18	− 3.47
Q345R	1	176.70	0. 202	248.73	40.76	0.091	165.7	− 6.23
Q345R	2	176.70	0. 207	261.87	48.20	0.095	167.7	− 5.09
18MnMoNbR	1	223.00	0.158	296.32	32.87	0.071	192.78	− 13.55
18MnMoNbR	2	223.00	0.178	317.52	42.38	0.064	184.37	− 17.32