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Comprehensive study on hydrogen induced cracking of electrical resistance welded API X52 pipeline steel.

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Title: Comprehensive study on hydrogen induced cracking of electrical resistance welded API X52 pipeline steel.
Authors: Khalili Tabas, A.A.1 (AUTHOR), Beidokhti, B.1 (AUTHOR) beidokhti@um.ac.ir, Kiani-Rashid, A.R.1 (AUTHOR)
Source: International Journal of Hydrogen Energy. Jan2021, Vol. 46 Issue 1, p1012-1022. 11p.
Subjects: Resistance welding, Mechanical heat treatment, Heat treatment, Electric welding, Steel welding, Steel pipe
Abstract: Different heat treatment cycles were designed in order to investigate the effect of microstructural changes on hydrogen induced cracking resistance (HIC) and mechanical properties of the electric resistance welded steel. The heat treating of the as-welded specimen improved the ductility and impact toughness. After heat treatment, the uniform hardness profile was obtained for the welded specimens. The removal of local hard zones reduced the risk of HIC. The chemical composition and clustering of inclusions have a deleterious effect on cracking resistance in the H 2 S environment. Aluminosilicate compounds and MnS inclusions were favorite sites for HIC. The most promising post weld heat treatment for improving mechanical properties and the resistance to HIC was the application of two-cycle quenching followed by tempering. • Hydrogen induced cracking was studied deliberately in the case of ERW pipelines. • Heat treatment cycles were applied considering the manufacturers point of view. • Morphology of cracks has been related to the microstructure of steel. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Different heat treatment cycles were designed in order to investigate the effect of microstructural changes on hydrogen induced cracking resistance (HIC) and mechanical properties of the electric resistance welded steel. The heat treating of the as-welded specimen improved the ductility and impact toughness. After heat treatment, the uniform hardness profile was obtained for the welded specimens. The removal of local hard zones reduced the risk of HIC. The chemical composition and clustering of inclusions have a deleterious effect on cracking resistance in the H 2 S environment. Aluminosilicate compounds and MnS inclusions were favorite sites for HIC. The most promising post weld heat treatment for improving mechanical properties and the resistance to HIC was the application of two-cycle quenching followed by tempering. • Hydrogen induced cracking was studied deliberately in the case of ERW pipelines. • Heat treatment cycles were applied considering the manufacturers point of view. • Morphology of cracks has been related to the microstructure of steel. [ABSTRACT FROM AUTHOR]
ISSN:03603199
DOI:10.1016/j.ijhydene.2020.09.219