CrMoV鋳鋼のクリープき裂進展
1976 年 25 巻 270 号 p. 236-240
詳細
1976 年 25 巻 270 号 p. 236-240
The influences of specimen geometry and temperature upon the creep crack growth rate of 1Cr 1Mo1/4V steel casting have been studied. The main results obtained are summarized as follows.
(1) In the SEN specimen without side grooves, the creep crack tends to tunnel at its center, and consequently, it is difficult to measure the creep crack growth rate accurately. However, in the SEN specimen with proper side grooves, the creep crack front is kept straight during its propagation without tunneling, and it is easy to measure the crack growth rate accurately.
(2) The relation between the creep crack growth rate and temperature can be described by the equation of so-called Arrehenius type and is similar to the relation between the steady creep rate and temperature in the temperature range of the present experiment.
