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Effect of manganese content and microstructure on the susceptibility of X70 pipeline steel to hydrogen cracking

Journal Article


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Abstract


  • The influence of composition and microstructure on susceptibility to hydrogen induced cracking (HIC) was investigated in high strength pipeline steels, with Mn contents of 1.2% (standard, X70), and 0.5% (medium, MX70). The HIC resistance of the simulated coarse grained heat affected zone microstructures and normalized X70 transfer bar was also investigated. Notched and fatigue pre-cracked samples were charged with hydrogen prior to three point bend tests.

    The conditional fracture toughness JQ was determined. The results are discussed in relation to grain size, microstructure, composition and the type and distribution of non-metallic inclusions and precipitates.

Publication Date


  • 2012

Citation


  • Hejazi, D., Haq, A. J., Yazdipour, N., Dunne, D. P., Calka, A., Barbaro, F. J. & Pereloma, E. V. (2012). Effect of manganese content and microstructure on the susceptibility of X70 pipeline steel to hydrogen cracking. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 551 (August 15), 40-49.

Scopus Eid


  • 2-s2.0-84862136978

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2014&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1005

Number Of Pages


  • 9

Start Page


  • 40

End Page


  • 49

Volume


  • 551

Issue


  • August 15

Abstract


  • The influence of composition and microstructure on susceptibility to hydrogen induced cracking (HIC) was investigated in high strength pipeline steels, with Mn contents of 1.2% (standard, X70), and 0.5% (medium, MX70). The HIC resistance of the simulated coarse grained heat affected zone microstructures and normalized X70 transfer bar was also investigated. Notched and fatigue pre-cracked samples were charged with hydrogen prior to three point bend tests.

    The conditional fracture toughness JQ was determined. The results are discussed in relation to grain size, microstructure, composition and the type and distribution of non-metallic inclusions and precipitates.

Publication Date


  • 2012

Citation


  • Hejazi, D., Haq, A. J., Yazdipour, N., Dunne, D. P., Calka, A., Barbaro, F. J. & Pereloma, E. V. (2012). Effect of manganese content and microstructure on the susceptibility of X70 pipeline steel to hydrogen cracking. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 551 (August 15), 40-49.

Scopus Eid


  • 2-s2.0-84862136978

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2014&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1005

Number Of Pages


  • 9

Start Page


  • 40

End Page


  • 49

Volume


  • 551

Issue


  • August 15