Notch Toughness of Spheroidal Graphitic High Ductility Iron Castings

摘要

Data from a literature survey of notch toughness of spheroidal graphitic iron castings and test results obtained in the U.S. Naval Weapons Plant were used to show the effect of material variables and external test factors oh the notch toughness of spheroidal graphitic cast iron. Material variables consist of chemical composition, microstructure, and susceptibility to temper brittleness. External factors cover test temperature, specimen dimensions, speed of loading, and stress concentration. An equation correlating the nil ductility te mperature with material variables and external test factors was obtained for spheroidal graphitic cast iron from literature and test data.