Research on Impact Properties of Several Alloy Materials by Instrumented Impact Test

In the paper,series temperature impact tests of D36,14MnVTiRe and 10CrNiCu steels are carried out on instrumented impact tester.The results show that ductile-brittle transition temperature of these steels is lower and it is more accurate to use crack propagation energy W_p as criterion for the ductile-brittle transition temperature.Fracture energy is consumed mostly on crack extension when test temperature is higher than ductile-brittle transition temperature;while it is consumed mostly on crack formation when test temperature is lower than ductile-brittle transition temperature.