Influence of graphite spherical size on fatigue behaviour and fracture toughness of ductile cast iron EN-GJS-400-18LT

✍ Scribed by Mottitschka, Thomas; Pusch, Gerhard; Biermann, Horst; Zybell, Lutz; Kuna, Meinhard

• Book ID: 121871421
• Publisher: Carl Hanser Verlag
• Year: 2012
• Tongue: English
• Weight: 712 KB
• Volume: 103
• Category: Article
• ISSN: 1862-5282
• DOI: 10.3139/146.110636

✦ Synopsis

Abstract

The employment of ferritic nodular cast iron for components subjected to high stress requires a detailed fracture mechanics evaluation of crack growth under static and cyclic loading. During operation, for instance, in wind power plants, such component parts are subjected to loading of variable amplitude, which influences their lifetime considerably. For the evaluation of crack propagation and the remaining service life in this case, the calculation methods currently well-established in practice cannot be employed for cast iron with nodular graphite, since overloads lead to microstructure-related and material-specific load history effects in terms of crack growth acceleration. In this work, investigations of crack growth under constant and variable amplitude loading as well as static fracture toughness investigations and strain-controlled cyclic deformation experiments are presented.