A CRITICAL REVIEW OF NOTCH SENSITIVITY IN STRESS-RUPTURE TESTS

摘要

The English and German literature on notch stress-rupture testing was reviewed and information obtained on:(l) the effect of notching on the rupture strength in general and, in particular, the influence of the unnotch ductility on the notch sensitivity;(2) the effect of chemical composition and heat treatment on the notch stress rupture characteristics of low-alloy heat-resisting steels;(3) the mechanism of stress-rupture embrittlement and notch sensitivity in these low-alloy steels;and (4) a comparison of the influence of notch geometry on the notch strength in stress-rupture tests and in conventional tensile tests.