DETERMINATION OF CHARACTERISTIC TRANSITION-TEMPERATURE OF LOW-TEMPERATURE BRITTLENESS IN MILD-STEEL

By means of the finite element method, the stress distributions below the notch root of some typical notch bending test specimens were analy zed in detail to obtain the numerical solution of the maximum principa l stress intensification Q(max) at the edge of the ''effective yield z one'', which is an important parameter characterizing the characterist ic transition temperature of low-temperature brittleness T(C). The pr esent work lays a theoretical foundation for determining the temperatu re T(C) using only series-temperature plain-tension test results.