Steel with yield strengths below about 900 MPa are essentially immune to hydrogen embrittlement, and almost all pipeline steels have a yield strength below that value. However, same catastrophic failures of pipelines have been reported. Under mechanical stress these failures are due to the local formation of high-hardness martensite (hard spot) during cooling and from the presence of absorbed hydrogen developed under cathodic over-protection. This paper describes a photoelectrochemical, micrographic and fractographic study of the effect of an heat-affected zone (hard spot) on hydrogen permeation and the embrittlement of an API 5L STD X60 steel.

(1998). Effect of the heat-affected zones on hydrogen permeation and embrittlement of low-carbon steels . Retrieved from http://hdl.handle.net/10446/82661

Effect of the heat-affected zones on hydrogen permeation and embrittlement of low-carbon steels

CABRINI, Marina;
1998-01-01

Abstract

Steel with yield strengths below about 900 MPa are essentially immune to hydrogen embrittlement, and almost all pipeline steels have a yield strength below that value. However, same catastrophic failures of pipelines have been reported. Under mechanical stress these failures are due to the local formation of high-hardness martensite (hard spot) during cooling and from the presence of absorbed hydrogen developed under cathodic over-protection. This paper describes a photoelectrochemical, micrographic and fractographic study of the effect of an heat-affected zone (hard spot) on hydrogen permeation and the embrittlement of an API 5L STD X60 steel.
1998
Razzini, G.; Cabrini, Marina; Maffi, S.; Mussati, G.; Bicelli, L.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/82661
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