Correlation of Fracture Toughness Determined by Spin Burst Testing and Deep Notch Test

概要

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For the estimation of the fracture toughness of the turbine generator rotor forgings by means of the fracture mechanics, the Spin burst testing which simulates the loading condition in the rotating rotor and the Deep Notch test which was proposed by H. Kihara and K. Ikeda to estimate the brittle fracture initiation characteristics were carried out. The obtained test results are as follows. 1) A good correlation of the fracture toughness determined by the Spin burst testing and the Deep Notch test was obtained. 2) The effect of the thickness on the fracture toughness of the turbine generator rotor forgings was recognized. 3) The dependency of the fracture foughness of the turbine generator rotor forgings upon the temperature was assumed the Arrhenius type dependency in the temperature range tested.
大阪大学の論文