Analysis of key factors of hydrogen environmental assisted cracking evaluation by small punch test on medium and high strength steels

Subsequently, it is proved that for the aforementioned situations, the numerical value of the deformation rate (uniaxial test) and the punch rate (SPT) that take place during these two tests will be alike for similar rupture times. Finally it is pointed that when the uniaxial slow strain rate test maximum stress and the SPT static load have a similar numerical value, the deformation rate (SSRT) and the punch rate (SPT) will be related, thus providing a simple way to estimate deformation rates using SPT instead of conventional SSRT tests.