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Multiple cracking under thermal fatigue

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2004
auteur(s) Fissolo Antoine; Maillot Valérie; Degallaix Gérard; Degallaix Suzanne; Amzallag C.
journal (abréviation) Revue de Métallurgie (Rev. De Métallurgie)
volume (numéro) 12
pages 1087 – 1099
résumé Tests were performed on austenitic stainless steels. In order to investigate thermal fatigue resistance of quasi-structural specimens, test facilities enforcing temperature variations similar to those found under the operative conditions have been developed. Multiple cracking networks similar to those detected during in-service inspections have been reproduced. Experiments and simulations deal with crack initiation and crack growth. In the case of multiple cracking simulation, a Skelton`s modelling has been used. A shielding effect between cracks is evidenced. It leads to a dramatic reduction of crack growth rate. Such effect is also crucial for the crack network stability under additional loading.
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