Role of microstructure in susceptibility of X70 pipeline steel to hydrogen embrittlement

Authors

Daniel Hejazi, University of WollongongFollow
Ayesha J. Haq, University of WollongongFollow
Nima Yazdipour, University of WollongongFollow
Druce P. Dunne, University of WollongongFollow
F Barbaro, University of WollongongFollow
E V. Pereloma, University of WollongongFollow

RIS ID

33801

Publication Details

Hejazi, D., Haq, A. J., Yazdipour, N., Dunne, D. P., Barbaro, F. and Pereloma, E. V. (2010). Role of microstructure in susceptibility of X70 pipeline steel to hydrogen embrittlement. A. Morton and J. Nie In Pacific Rim International Conference on Advanced Materials and Processing, 2-6 Aug,2010, Cairns, Australia. Materials Science Forum, 654-656 162-165.

Abstract

In order to investigate the susceptibility of steels to hydrogen embrittlement as a function of their microstructure X70 steel was chosen in different conditions: normalized transfer bar, as-received hot rolled strip and heat affected zone (HAZ). Notched and fatigue pre-cracked samples were subjected to electrochemical hydrogen charging to achieve 2 ppm hydrogen content. Three point bend tests were conducted on as-received and hydrogen charged samples. The results showed that HAZ samples are more susceptible to hydrogen embrittlement than the others. This was supported by fracture surface observations.