Stress corrosion cracking of 304L stainless steel in water at 288°C

Yonghao Lu, Wuyang Chu, Kewei Gao, Lijie Qiao, T. Shoji

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Stress corrosion cracking (SCC) of a sensitized 304L stainless steel was carried out under slow tension of a pre-cracked sample in water containing oxygen at 288°C. Thin foil samples were prepared along its cross-section containing the pre-cracks, and the tip region of SCC was studied by analytical TEM. The observations show that there are oxides with a size of several hundreds nanometers ahead of a crack tip of SCC and around the discontinuous microcracks. Fine-probe analysis was used to determine local compositions of the oxides, indicating the oxides were Cr2O3, Fe3O4 and their mixture. Many microcracks are distributed unevenly in the oxides. Microcracks initiated discontinuously in the oxides ahead of a main crack because of a large stress concentration. The growth and connection of the discontinuous microcracks in the oxides resulted in the propagation of SCC.

Original languageEnglish
Pages (from-to)763-767
Number of pages5
JournalJinshu Xuebao/Acta Metallurgica Sinica
Volume40
Issue number7
Publication statusPublished - 2004 Jul 1

Keywords

  • 304L stainless steel
  • Oxide
  • Stress corrosion cracking
  • Water at 288°C

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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