A multiscale constitutive model for intergranular stress corrosion cracking in type 304 austenitic stainless steel

Amir Siddiq, S. Rahimi

Research output: Contribution to journalArticle

1 Citation (Scopus)
6 Downloads (Pure)

Abstract

Intergranular stress corrosion cracking (IGSCC) is a fracture mechanism in sensitised austenitic stainless steels exposed to critical environments where the intergranular cracks extends along the network of connected susceptible grain boundaries. A constitutive model is presented to estimate the maximum intergranular crack growth by taking into consideration the materials mechanical properties and microstructure characters distribution. This constitutive model is constructed based on the assumption that each grain is a two phase material comprising of grain interior and grain boundary zone. The inherent micro-mechanisms active in the grain interior during IGSCC is based on crystal plasticity theory, while the grain boundary zone has been modelled by proposing a phenomenological constitutive model motivated from cohesive zone modelling approach. Overall, response of the representative volume is calculated by volume averaging of individual grain behaviour. Model is assessed by performing rigorous parametric studies, followed by validation and verification of the proposed constitutive model using representative volume element based FE simulations reported in the literature. In the last section, model application is demonstrated using intergranular stress corrosion cracking experiments which shows a good agreement.

Original languageEnglish
Article number012022
JournalJournal of Physics: Conference Series
Volume451
Issue number1
DOIs
Publication statusPublished - 2 Sep 2013

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intergranular corrosion
stress corrosion cracking
austenitic stainless steels
grain boundaries
cracks
plastic properties
mechanical properties
microstructure
estimates
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

A multiscale constitutive model for intergranular stress corrosion cracking in type 304 austenitic stainless steel. / Siddiq, Amir; Rahimi, S.

In: Journal of Physics: Conference Series, Vol. 451, No. 1, 012022, 02.09.2013.

Research output: Contribution to journalArticle

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