Influence of heterogeneous plastic strain fields on the corrosion susceptibility of duplex stainless steels at the microscale

• Autorzy: Vignal V. , Kempf D.
• Języki publikacji: EN

Abstrakty

EN

In the present paper, grid points coupled with an image analysis method are used to map strain gradients within grains and across interfaces of duplex stainless steels at the micro- and nanoscale under straining conditions (4.5% plastic strain). Highly heterogeneous strain field are obtained and sites where high strain gradients exist are identified. Local electrochemical meas-urements are then performed in NaCl-based media within these sites by means of the electrochemical microcell technique and 20 11m microcapillaries in order to propose new mechanical-electrochemical criteria leading to a significant enhancement of anodic and/Dr cathodic reactions and pitting susceptibility of deformed materials.

Słowa kluczowe

EN

pitting corrosion; duplex stainless steel; microstructure; plastic strain; microprobes

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2007
• Tom: Vol. 7, nr 1(11)
• Strony: 77--82
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Vignal V.

autor

Kempf D.

• ICB, UMR 5209 CNRS-Universite de Bourgogne, BP 47870, 21078 Dijon Cedex, France

Bibliografia

• [1] Mary N., Vignal V., Oltra R. and Coudreuse L: Finite-element and XRD methods for the determination of the residual surface stress field and the elastic-plastic behaviour of duplex stainless steels. Philosophical Magazine 85 (2005), pp.1227-1242.
• [2] Vignal V., Mary N., Oltra R. and Peultier J.: A mechanical-electrochemical approach for the determination of precursor sites for pitting corrosion at the microscale. Journal of the Electrochemical Society, 153 (2006), pp. B352-B357.
• [3] Kempf D., Vignal V., Cailletaud G., Ohra R., Weeber J.C. and Finot E.: High spatial resolution strain measurements at the surface of duplex stainless steels. Philosophical Magazine, in press.
• [4] Krawiec H., Vignal V. and Banas J.: Macroscopic and Local Electrochemical Studies of Austempered Ductile Iron in Perchlorate Solutions. Journal of the Electrochemical Society, 153 (2006), pp. B231-B237.
• [5] Vignal V., Mary N., Valot C., Oltra R. and Coudreuse L: Influence of an elastic deformation on the initiation of pits on duplex stainless steels. Electrochemical and Solid-State Letters, 7 (2004), pp. C39-C42.