Degenerated graphite nodules influence on fatigue crack paths in a ferritic ductile cast iron
DOI:
https://doi.org/10.3221/IGF-ESIS.34.45Keywords:
Ferritic-pearlitic ductile cast ironsAbstract
Focusing on ferritic-pearlitic DCIs, these alloys are characterized by a microstructure that ranges
from a fully ferritic to a completely pearlitic matrix, and they are widely used for many applications (e.g. wheels,
gears, crankshafts in cars, exhaust manifolds, valves, flywheels, boxes bearings, hubs, shafts, valves, flanges,
pipelines ...). Considering the graphite elements, their morphology can be considered as degenerated when its
nodularity is too low and this can be due to different causes (e.g., a partially failed nodularization process or a
wrong inoculant). In this work, a ferritic DCI with degenerated nodules was obtained by means of an annealing
treatment and the fatigue crack propagation resistance was investigated by means of fatigue crack propagation
tests performed according to ASTM E647, focusing on the influence of degenerated graphite nodules on the
fatigue crack paths. This analysis was performed both analysing the crack path profile by means of a scanning
electron microscope (SEM) and by means of a SEM fracture surfaces analysis.
Downloads
Downloads
Published
Issue
Section
Categories
License
Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.
Open Access Statement
Frattura ed Integrità Strutturale (Fracture and Structural Integrity, F&SI) is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the DOAI definition of open access.
F&SI operates under the Creative Commons Licence Attribution 4.0 International (CC-BY 4.0). This allows to copy and redistribute the material in any medium or format, to remix, transform and build upon the material for any purpose, even commercially, but giving appropriate credit and providing a link to the license and indicating if changes were made.
How to Cite
