S0301-3-5 Evaluation of Strength and Fatigue Crack Propagation in Forged Cast Iron with Spheroidal Carbides Dispersed within Martensitic Matrix Microstructure

Abstract

The effect of forging on flexural strength, fracture toughness and fatigue crack propagation (FCP) in martensitic-matrix cast iron was investigated. Forging could not eliminate casting defects effectively and was detrimental to flexural strength. Forging exerted little influence on fracture toughness and FCP behavior, while reduced the scatter in fracture toughness.