Damage Kinetics and Fracture Toughness of Nodular Cast Iron

  1. Prof. Yves Bréchet
  1. C. Berdin and
  2. C. Prioul

Published Online: 19 DEC 2005

DOI: 10.1002/3527606157.ch24

Microstructures, Mechanical Properties and Processes - Computer Simulation and Modelling, Volume 3

Microstructures, Mechanical Properties and Processes - Computer Simulation and Modelling, Volume 3

How to Cite

Berdin, C. and Prioul, C. (2000) Damage Kinetics and Fracture Toughness of Nodular Cast Iron, in Microstructures, Mechanical Properties and Processes - Computer Simulation and Modelling, Volume 3 (ed Y. Bréchet), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606157.ch24

Editor Information

  1. Institut Nat. Polytechnique de Grenoble, L.T.P.-C.M. ENSEEG, BP75, Domaine Universitaires, 38402 Saint Martin D'Hères Cedex, France; Tel.: 0033–76–82 6610; Fax: 0033–76–82 6644

Author Information

  1. Laboratoire MSS/MAT, CNRS UMR 8579, Ecole Centrale Paris, France

Publication History

  1. Published Online: 19 DEC 2005
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301225

Online ISBN: 9783527606153

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Keywords:

  • microstructures;
  • computer simulation;
  • mechanical properties;
  • damage kinetics;
  • fracture toughness;
  • nodular cast iron

Summary

Nodular cast iron is a very attractive alloy for components for automotive industry and transportation of nuclear fuel because of low cost processing. Nevertheless failure safe design of stressed components requires a thorough knowledge of mechanical properties and defect tolerance of the material. Ductile fracture has been extensively studied, as well as the influence of distribution and size of graphite nodules, and stress triaxiality.

Recently, some of the authors have studied a GGG40 cast iron. The observations of damage mechanisms showed that the interface between graphite nodule and iron matrix is very weak, so that nodules can be considered as voids.

The main purpose of the present study is to determine whether this approach can be generalized to various nodular cast irons having different chemical composition and microstructures. Therefore, two materials are compared. The first nodular cast iron is the one previously studied, and the second one is a GS52 type cast iron. Precise damage observations, tensile properties and fracture toughness measurements, are associated to numerical modeling of the mechanical behavior performed by using the Tvergaard Needleman modified Gurson's model (GTN model).