Microstructural changes in steel 10Kh9V2MFBR during creep for 40000 hours at 600°C

In this work, we have investigated microstructural changes in steel 10Kh9V2MFBR (analog of P02 steel) after long-term creep tests at a temperature of 600°C under an initial stress of 137 MPa. Time to rupture was found to be more than 40000 h. It has been established that, in the zone of grips and in the neck region of the sample, the size of the particles of the M23C6 carbides increases from 85 nm to 152 nm and 182 nm, respectively. In addition,...