Some recularities in the ductile-brittle failure of cast irons with spheroidal graphite

Abstract

1. An increase in the pearlite content in the metal base and manganese in cast iron leads to an increase in critical brittleness temperatures. 2. There is no clear correspondence between critical brittleness temperatures with impact testing by GOST 9454-78, determined from 50% ductile component in a specimen fracture and from the value of failure energy. 3. Sections with a sharp change in the relationship\(K_{I_c ^{ - \sigma _{0.2} } } \) apparently correspond to a change in the material failure mechanism.