Plastic deformation of irradiated zirconium alloys: TEM investigations and micro-mechanical modeling

Fabien Onimus, Jean Luc Béchade, Claude Prioul, Philippe Pilvin, Isabelle Monnet, Sylvie Doriot, Bénédicte Verhaeghe, Didier Gilbon, Laurence Robert, Laurent Legras, Jean Paul Mardon, A. Motta, K. Kapoor, R. Adamson, G. Sheck

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

TEM investigations have been performed on irradiated samples after deformation covering various testing conditions for different recrystallized Zr alloys. It is shown that for transverse tensile tests and internal pressure tests performed at 350°C, only basal channels are observed for strain levels up to uniform elongation, whereas only prismatic and pyramidal channels are observed for axial tensile test. Then, focusing on internal pressure testing, irradiation hardening and strain hardening behavior have been analyzed in detail and compared to TEM observations. It is proposed that dislocation channeling phenomenon leads to high strain incompatibility between channels and surrounding grains and therefore to high microscopic internal stresses. These high microscopic internal stresses are believed to induce strong kinematic hardening at the macroscopic scale, as suggested by the mechanical behavior analysis. Finally, a micro-mechanical model based on microscopic deformation mechanisms and using homogenization techniques is proposed, taking into account the observed channeling phenomenon.

Original languageEnglish (US)
Title of host publicationZirconium in the NUCLEAR INDUSTRY - Fourteenth International Symposium
PublisherAmerican Society for Testing and Materials
Pages53-78
Number of pages26
Edition1467
ISBN (Print)0803134932, 9780803134935
StatePublished - Jan 1 2005
Event14th International Symposium on Zirconium in the NUCLEAR INDUSTRY - Stockholm, Sweden
Duration: Jun 13 2004Jun 17 2004

Publication series

NameASTM Special Technical Publication
Number1467
ISSN (Print)0066-0558

Other

Other14th International Symposium on Zirconium in the NUCLEAR INDUSTRY
CountrySweden
CityStockholm
Period6/13/046/17/04

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Onimus, F., Béchade, J. L., Prioul, C., Pilvin, P., Monnet, I., Doriot, S., Verhaeghe, B., Gilbon, D., Robert, L., Legras, L., Mardon, J. P., Motta, A., Kapoor, K., Adamson, R., & Sheck, G. (2005). Plastic deformation of irradiated zirconium alloys: TEM investigations and micro-mechanical modeling. In Zirconium in the NUCLEAR INDUSTRY - Fourteenth International Symposium (1467 ed., pp. 53-78). (ASTM Special Technical Publication; No. 1467). American Society for Testing and Materials.