Abstract
Damage characteristics of pearlite ductile cast iron due to fatigue crack have been investigated by acoustic emission (AE) technique. As perlite type spheroidal graphite cast iron has high strength as well as excellent workability and damping capacity, it has been widely used as automobile and many other machine parts. However, the damage initiation and propagation of this type of this type of spheroidal graphite cast iron might depend not only on the graphite size but also on the distribution of the graphite cast nodules. Therefore, the cracks are initiated from the larger or coarser graphite nodules. In this study, the failures of pearlite ductile cast iron caused by cracks and micro-cracks have been investigated sequentially by AE technique as a non-detective evaluated and characterized by analyzing AE parametric investigations and found remarkable results as well.
