MECHANICAL BEHAVIOUR OF NODULAR CAST IRONS AFTER PROLONGED HIGH TEMPERATURE EXPOSURE

摘要

Several ductile cast irons with different matrix microstructures (perlitic, ausferritic.....) were compared in terms of their microstructural evolution, residual hardness and tensile properties, after prolonged high temperature exposure. PDI The highest thermal stability among the tested ductile cast irons was observed in the PDI Even if ADI displayed the most evident strength reduction after exposure at 500°C, they always showed UTS and YS higher than the others DIs.