ON THE HIGH-CYCLE FATIGUE BEHAVIOR OF DUPLEX STAINLESS-STEELS - INFLUENCE OF THERMAL AGING

Authors
LLANES L MATEO A VIOLAN P MENDEZ J ANGLADA M
Citation
L. Llanes et al., ON THE HIGH-CYCLE FATIGUE BEHAVIOR OF DUPLEX STAINLESS-STEELS - INFLUENCE OF THERMAL AGING, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 234, 1997, pp. 850-852
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
234
Year of publication
1997
Pages
850 - 852
Database
ISI
SICI code
0921-5093(1997)234:<850:OTHFBO>2.0.ZU;2-Z
Abstract
In this investigation the high cycle fatigue (HCF) behavior of an aust enite-ferrite duplex stainless steel (DSS) is studied as a function of aging at 475 degrees C. It is found that the HCF strength and the fat igue sensitivity of DSS increase with aging. The fatigue strength impr ovement results from the higher cyclic yield stress of the spinodally- hardened ferrite which induces an increasing difficulty for early prop agation, into and through the ferritic matrix, of microcracks nucleate d within austenite. The fatigue sensitivity impairment is suggested to be correlated to an easier microcrack nucleation stage in the aged DS S as compared to the annealed or unaged one. (C) 1997 Elsevier Science S.A.