Ultrasonic and Mechanical Studies of Some . Properties of Ductile Cast Iron

Abstract

Ductile cast iron round bars of0.75, 1, 1.25 and 1.5 em casting moduli were prepared using alloys have carbon equivalent percentages (C.E) ranges between 4.50% and 4.76% Different measurements were carried out on as-cast and heat treated (annealed at 680°C for 6hr and air cooled to room temperature) specimens. Ultrasonic velocity and attenuation were measured using pulse echo technique at frequencies 1,2 and 4 MHz. Mechanical properties (namely; ultimate tensile strength, 0.2 % offset yield, elongation and hardness) of the different bars were evaluated. The microstructures of specimens were investigated.