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Stress corrosion cracking and hydrogen embrittlement susceptibility of an eutectoid steel employed in prestressed concrete
The stress corrosion and hydrogen embrittlement behavior of AISI 1080 steel employed in concrete prestressing tendons was studied with different experimental techniques. A simulated concrete pore solution, with and without contaminants such as chloride, sulfate and thiocyanate ions was used. For comparison purposes the standard 20% ammonium thiocyanate solution was also employed. Two different heat treatment were employed: (a) austenitizing at 800 deg C for 2 h, quenching in oil and tempering for 1 h at 470 deg C; (b) austenitizing at 800 deg C for 2 h, quenching in oil and tempering for 1 h at 150 deg C. Polarization curves, slow strain rate tests and fracture mechanics tests were used to evaluate the influence of parameters such as potential, temperature (between 0 and 100 deg C), and tempering temperature of the steel. The results have shown that the fracture mechanism of the stress corrosion cracking process is associated with hydrogen action.
Stress corrosion cracking and hydrogen embrittlement susceptibility of an eutectoid steel employed in prestressed concrete
The stress corrosion and hydrogen embrittlement behavior of AISI 1080 steel employed in concrete prestressing tendons was studied with different experimental techniques. A simulated concrete pore solution, with and without contaminants such as chloride, sulfate and thiocyanate ions was used. For comparison purposes the standard 20% ammonium thiocyanate solution was also employed. Two different heat treatment were employed: (a) austenitizing at 800 deg C for 2 h, quenching in oil and tempering for 1 h at 470 deg C; (b) austenitizing at 800 deg C for 2 h, quenching in oil and tempering for 1 h at 150 deg C. Polarization curves, slow strain rate tests and fracture mechanics tests were used to evaluate the influence of parameters such as potential, temperature (between 0 and 100 deg C), and tempering temperature of the steel. The results have shown that the fracture mechanism of the stress corrosion cracking process is associated with hydrogen action.
Stress corrosion cracking and hydrogen embrittlement susceptibility of an eutectoid steel employed in prestressed concrete
Empfindlichkeit eines eutektoidischen Stahls in Spannbeton gegenüber Spannungsrisskorrosion und Wasserstoffversprödung
Schroeder, R.M. (author) / Müller, I.L. (author)
Corrosion Science ; 45 ; 1969-1983
2003
15 Seiten, 8 Bilder, 1 Tabelle, 22 Quellen
Article (Journal)
English
Spannbetonstahl , eutektoidischer Stahl , Spannbeton , Spannungsrisskorrosion , Wasserstoffversprödung , Austenitisierung , Abschrecken (Abkühlen) , Anlassen (Wärmebehandlung) , Anlasstemperatur , Temperatureinfluss , bruchmechanische Prüfung , Zugprüfung , Dehngeschwindigkeit , Polarisationskurve , anodische Polarisation , kathodische Polarisation , Korrosionspotenzial , Bruchmechanismus , Schadstoff , Calciumhydroxid
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