Model of corrosion cracking of irradiated austenitic steels. Part 1. Analysis of damage mechanisms and formulation of the defining-Reference-Cited by-同舟云学术

Model of corrosion cracking of irradiated austenitic steels. Part 1. Analysis of damage mechanisms and formulation of the defining

Published:2019-08-11 Issue:2(98) Volume: Page:154-177
ISSN:1994-6716
Container-title:Voprosy Materialovedeniya
language:
Short-container-title:Vopr. materialoved.

Author:

Margolin B. Z.¹,Sorokin A. A.¹,Pirogova N. E.¹,Potapova V. A.¹,Toivonen Aki²,Sefta Faiza³,Pokor Cédric³

Affiliation:

1. NRC ”Kurchatov Institute” – CRISM “Prometey”

2. VTT Technical Research Centre of Finland

3. EDF R&D, EDF-Lab Les Renardières

Abstract

Mechanisms having a potential effect on irradiation assisted stress corrosion cracking (IASCC) of austenitic steels in the LWR environment have been analyzed. Based on the analysis and generalization of reference and original data on IASCC, an IASCC initiation criterion has been formulated. Conditions for grainboundary microcrack propagation by IASCC mechanism have been formulated. The nature of low-temperature creep of irradiated austenitic steels has been considered, constitutive equations have been derived. Relying on the formulated criterion of grain-boundary microcrack nucleation and the derived creep equations, an IASCC initiation model has been developed. The model allows one to predict the dependence of the threshold stress σIASCC th on neutron dose and also to calculate the IASCC initiation time with stresses exceeding σIASCCth .

Publisher

FSUE CRISM Prometey

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