In this work, the effect of hydrogen charging on the hydrogen embrittlement of Grades 359 and 448 pipeline steels is investigated by proof ring test. Hydrogen charging is carried out using a cathodic charging cell. The specimens are inserted into proof rings for constant-load testing under in situ and ex situ hydrogen charging conditions. Furthermore, basic mechanical properties were determined under different charging conditions. It was found that the hydrogen-charged specimens exhibited loss of ductility.

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Effects of Hydrogen-Charging on the Mechanical Properties of Pipeline Steels

  • Vahid Jalilvand,
  • Hesamedin Ghadiani,
  • Zoheir N. Farhat,
  • Tahrim Alam,
  • Md. Aminul Islam

摘要

In this work, the effect of hydrogen charging on the hydrogen embrittlement of Grades 359 and 448 pipeline steels is investigated by proof ring test. Hydrogen charging is carried out using a cathodic charging cell. The specimens are inserted into proof rings for constant-load testing under in situ and ex situ hydrogen charging conditions. Furthermore, basic mechanical properties were determined under different charging conditions. It was found that the hydrogen-charged specimens exhibited loss of ductility.