Fatigue Crack Propagation of Super-Duplex Stainless Steel at Different Temperatures

Abstract

The fatigue crack propagation behaviour in an austenite-ferrite two phase super-duplex stainless steel (SDSS) (UNS S32750) has been investigated at temperatures from -50ºC to 150 C. Two material conditions (as delivered condition-AD and aged condition (475 ºC/4h)) and two stress ratio values (R=0,1 and 0,5) were used. The fatigue crack propagation rate, threshold value, closure and fracture behaviour have been studied.

Extension of the strain energy density method for fatigue assessment of welded joints to sub‐zero temperatures

“…(A) Sub‐zero temperatures ∆K th data extracted from literature and (B) normalised average ∆K th change at sub‐zero temperatures from 50 datasets reported in literature 52–75 [Colour figure can be viewed at wileyonlinelibrary.com]…”