Effects of applied stress and microstructure on sulfide stress cracking resistance of pipeline steels subject to hydrogen sulfide were investigated by the single-edge notched tensile method using a microalloyed steel and a non-microalloyed steel. The failure time increased with the decreasing applied stress, and finally the threshold stress intensity factor was calculated for acicular ferrite (AF) and ferrite-pearlite (FP) in these two steels. The strength was not the dominant factor for the SSC, and aged microalloyed AF had the best SSC resistance in coincidence with the highest strength. The SSC resistance in sort ascending was non-microalloyed AF, non-microalloyed FP, microalloyed FP, microalloyed AF and aged microalloyed AF. The SSC was explained from hydrogen penetration and microstructural characteristic. The localized hydrogen concentration was enhanced by applied stress. The higher the applied stress, the more easily the SSC occurred. Carbonitrides and pinned dislocations contributed in better SSC resistance.
Effect of applied stress and microstructure on sulfide stress cracking resistance of pipeline steels subject to hydrogen sulfide
2008
5 Seiten, 20 Quellen
Article (Journal)
English
Carbonitrieren , Fehleranalyse , ferritisch-perlitischer Stahl , Kerbprüfkörper , Korrosionsbeständigkeit , Kristallmikrostruktur , Kristallversetzung , mechanische Spannungsverteilung , mikrolegierter Stahl , Pipeline , Risskorrosion , Risswiderstand , Rohrleitung , Rohrstahl , Schwefelwasserstoff , Schwellenspannung (mechanisch) , Spannungsintensitätsfaktor , Spannungsrissbildung , Sulfidierung , Wasserstoffversprödung , Zugbeanspruchung , Zugfestigkeit
Effect of line pipe steel microstructure on susceptibility to sulfide stress cracking
Tema Archive | 2004
|Hydrogen-induced cracking of steels under wet hydrogen sulfide environment
Tema Archive | 1975
|Resistance of products made of steel 20GL to sulfide stress corrosion cracking
DOAJ | 2023
|Prediction of sulfide stress cracking in high-strength tubulars
Tema Archive | 1994
|