The effect of iodine content and specimen orientation on stress corrosion crack growth rate in Zircaloy-4

A. Serres (1, 2) , L. Fournier , Marion Fregonese (3) , Q. Auzoux , D. Leboulch

1 UFCG
2 LCIS - Laboratoire de Conception et d'Intégration des Systèmes
3 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

The influence of specimen orientation, stress intensity factor (KI), and iodine concentration on the iodine-induced stress corrosion cracking growth rates in Zircaloy-4 was investigated in iodized methanol solutions at ambient temperature. When KI is lower than 20 MPa.m1/2, the intergranular and mixed intergranular/transgranular crack propagation rates increase linearly with (KI - KI,th), KI,th being the onset of propagation stress intensity factor. The increase in iodine content induces an increase of the crack growth rate for a given KI, and a decrease of the KI,th. The specimen orientation is a second order parameter. A crack propagation law, depending on iodine content, is proposed. © 2010 Elsevier Ltd. All rights reserved.

Mots clés: C. Stress corrosion; Ambient temperatures; Crack growth rates; Crack propagation rate; Induced stress; Intergranular; Iodine concentration; Methanol solution; Second orders; Stress intensity factors; Residual stresses; Methanol; Zirconium; Zirconium alloys; Specimen orientation; Stress corrosion; Stress corrosion crack; Zircaloy-4; Asphalt pavements; Crack propagation; Cracks; Industrial chemicals; Iodine; Zirconium compounds; Stress corrosion cracking

Domaines: Matériaux

A. Serres, L. Fournier, Marion Fregonese, Q. Auzoux, D. Leboulch. The effect of iodine content and specimen orientation on stress corrosion crack growth rate in Zircaloy-4. Corrosion Science, 2010, 52 (6), pp.2001-2009. ⟨10.1016/j.corsci.2010.02.008⟩. ⟨hal-01813938⟩