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 language | English |
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Pages (from-to) | 763-767 |
Number of pages | 5 |
Journal | Jinshu Xuebao/Acta Metallurgica Sinica |
Volume | 40 |
Issue number | 7 |
Publication status | Published - 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