Crack Growth Anomalies in Base Steel P91 and in HAZ
The growth of cracks in base steel P91 of 9Cr-1Mo class and in intercritical layer of HAZ is measured under creep coditions. For long term tests, a material degradation was detected consisting in an increase of crack growth rate and in a decrease of crack initiation time. An attempt is made to connect these effects with drop in ductility during thermomechanicalexposition.
J. Balík et al., "Crack Growth Anomalies in Base Steel P91 and in HAZ", Materials Science Forum, Vol. 482, pp. 383-386, 2005