| taille du texte : S-M-L |
| impression | intranet

Short Crack Initiation during Low-Cycle Fatigue in SAF 2507 Duplex Stainless Steel

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2007
auteur(s) Marinelli Maria-Cecilia; Alvarez-Armas Iris; Degallaix Suzanne
journal (abréviation) Key Engineering Materials (Key Engineering Materials)
volume (numéro) 345-346
  
pages 343 – 346
résumé In this work, the formation of fatigue cracks is considered as a nucleation process due to the development of a characteristic microstructure formed just beneath the specimen surface. Strain controlled cyclic tests were carried out at room temperature at total strain ranges t = 0.8 and 1.2% in flat specimens of SAF 2507 Duplex Stainless Steel (DSS). The results show that for this DSS, at t = 0.8%, the correlation between phases (Kurdjumov-Sacks crystallographic relation) plays an important role in the formation of microcracks. On the other hand, at t = 1.2%, microcracks initiate in the ferritic phase and the K-S relation does not seem to affect the formation of the cracks.
mots clés Crack Initiation, Duplex Stainless Steels, Low Cycle Fatigue, Microstructure
Exporter la citation au format CSV (pour Excel) ou BiBTeX (pour LaTeX).