Environmental degradation of fracture resistance in high-temperature water environments of low-alloy reactor pressure vessel steels with high sulphur or phosphorus contents

Z. Que (Corresponding Author), H. P. Seifert, P. Spätig, J. Holzer, A. Zhang, G. S. Rao, S. Ritter

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The fracture behaviour of low-alloy reactor pressure vessel steels with various sulphur and phosphorus contents, different environmentally-assisted cracking (EAC)and temper embrittlement (TE)susceptibilities was evaluated by elastic plastic fracture mechanics tests in air and various simulated light water reactors environments. A moderate but clear reduction of fracture initiation resistance occurred in a)high-sulphur steel with high EAC susceptibility in oxygenated high-temperature water with aggressive occluded crevice environment and preceding EAC growth, and in b)high-phosphorus steel with high TE susceptibility, where the reduction of fracture resistance was most pronounced in hydrogenated high-temperature water.
Original languageEnglish
Pages (from-to)191-207
Number of pages17
JournalCorrosion Science
Volume154
DOIs
Publication statusPublished - 1 Jul 2019
MoE publication typeNot Eligible

Keywords

  • Environmentally-assisted cracking
  • Fracture resistance
  • Hydrogen embrittlement
  • Low alloy steel
  • Temper embrittlement

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