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Thermomechanical analysis of thermal shock fracture in the brittle/ductile transition zone. Part I: Description of tests


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S. Chapuliot, M.H. Lacire, S. Marie*, M. Nédélec**, 

Engineering Fracture Mechanics, Volume 72, Issue 5, pages 661-673 (2005),
Rapport DSR 109

Type de document > *Article de revue, *Rapport/contribution à GT (papier ou CD-Rom)

Mots clés > choc thermique, cuve réacteur

Unité de recherche > IRSN/DSR/SAMS

Auteurs > NEDELEC Michel

Date de publication > 21/03/2006

Résumé

This article describes the experimental part of a project to develop a method for testing thermal shock combined with mechanical loading. The main objectives were to create the conditions for a major shock and to carry out the test in the laboratory using conventional equipment. The work focused on 16 MND 5 steel (A508) used for reactor vessels and on tearing close to the brittle/ductile transition temperature. The article is divided into two main parts:

  • The first describes how the properties of the material were determined. These properties were required for numerical simulations and for understanding the fracture mechanisms.
  • The second describes the test proposed using a specially-adapted compact specimen and the preliminary test results. It also describes the test potential, particularly the thermal gradients that can be obtained and the possible loading/temperature changes.


* CEA Saclay, ** IRSN Fontenay-aux-Roses,