The effect of delta-ferrite on fatigue cracks in 304L steels

Citation
Bs. Rho et al., The effect of delta-ferrite on fatigue cracks in 304L steels, INT J FATIG, 22(8), 2000, pp. 683-690
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
INTERNATIONAL JOURNAL OF FATIGUE
ISSN journal
0142-1123 → ACNP
Volume
22
Issue
8
Year of publication
2000
Pages
683 - 690
Database
ISI
SICI code
0142-1123(200009)22:8<683:TEODOF>2.0.ZU;2-H
Abstract
Continuous low-cycle fatigue tests of 304L stainless steel at 300 and 600 d egrees C and Delta epsilon(t)=+/- 2.0% in an air environment were conducted , and the effects of the amount and direction of delta-ferrite stringers on fatigue crack initiation and fatigue life were investigated. Fatigue crack initiation was observed at the interface between delta-ferrite and a parti culate matrix. The effect of delta-ferrite in 304L stainless steel on fatig ue life in low-cycle fatigue was investigated. 304L stainless steel with de lta-ferrite perpendicular to the loading axis has a much shorter fatigue li fe than that with delta-ferrite parallel to the stress axis. These phenomen a are thought to be caused by the strain incompatibility at the interface b etween delta-ferrite and the matrix. (C) 2000 Published by Elsevier Science .