Fracture toughness K(IC) is one of the important parameters to characterize the general mechanical properties of materials, Tests for determining K(IC) are usually performed on a fatigue test machine. However, for some large structure parts, such as hydropower generator rotor, weighing several tons or even one hundred tons, it requires large samples for testing, which results in the large loss of the materials.. In the present work, we use a small sample to measure its J(IC), and the consistency of J(IC) and K(IC) on characterizing fracture toughness of small size samples was analyzed. Both th...
