The assessment techniques for creep damage in martensitic heat-resistant steels with high Cr content are summarized

including metallurgic replica

positron annihilation

hardness test

ultrasonic testing

electron back scattering diffraction technique(EBSD)

electrochemical measurement

high temperature strain measurement

small punch test and so on.The advantages

disadvantages and prospects of the above techniques are all discussed.At last

suggestions are presented for the development of a practical technique in the field test

and the creep strain measurement and small punch creep testing were considered as the monitoring techniques with the most developing prospect.