Short Fatigue Crack Behavior in Duplex Stainless Steels

M.C. MARINELLI; S.A.N HEREÑÚ

Recent Trends in Fatigue Design

Nova Science Publishers

Lugar: New York; Año: 2014; p. 161 - 196

  The aim of this study is to analyze the short fatigue crack behavior of different duplex stainless steel (DSS) grades under two thermal conditions: as-received and embrittled (100 h at 475oC). A detailed review on the state of art of this theme has been carried out. The chapter is divided into five sections. The first section or introduction outlines the theoretical background necessary for the present investigation. In the second section an overall description of the principal experimental techniques employed is highlighted. In the third section the results reported from different researchers are summarized and discussed. This third section is divided in two subsections: low cycle fatigue (LCF) and high cycle fatigue (HCF), due to the different physical mechanisms involved in each case to produce failure. In the fourth section a model to reproduce the propagation of microstructural fatigue cracks in DSS is adapted. In the last section the concluding remarks and scope for further research in this area of investigation are presented.