Applicability of the Modified Ritchie-Knott-Rice Failure Criterion to Examine the Feasibility of Miniaturized Charpy Type SE(B) Specimens

Table 1

Fracture toughness test results of S55C steel with 25t SE(B) specimen tested at 20°C. Here, and in the table denote the mean and standard deviation of each parameter.

Specimen id	1	2	3	4	5	6			2/%
	0.50	0.50	0.50	0.50	0.49	0.50	0.50	0.00
(kN)	23.1	22.7	22.4	24.1	23.6	22.4	23.1	0.629
(MPam^1/2)	62.7	60.5	59.8	65.4	61.8	59.6	61.6	2.01
(N/mm)	46.8	35.9	33.5	61.1	52.0	37.8	44.5	9.81
(MPam^1/2)	103	90.1	87.1	118	108	92.4	99.8	10.9	21.8
	105	137	147	80.6	96.6	130	116	23.7