Stress corrosion crack initiation in filler metal 82 in oxygenated high-temperature water

N. Supornpaibul, J. Duff, M.g. Burke, Y. Wang, F. Scenini

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Abstract

The Stress Corrosion Cracking (SCC) initiation in filler metal (FM) 82 was studied in oxygenated (O2) water at 288 °C. Post-test microstructural characterization revealed that cracked grain boundaries (GBs) always exhibited a porous oxide incursion. Some intergranular (IG) cracks exhibited an oxide along the crack walls, which appeared to form after the crack advanced. Furthermore, similar porous oxide incursions were observed at the GBs on the non-stressed FM 82 coupon after oxidizing for a similar duration. The formation of oxide incursions is discussed, and the evolution of crack initiation is proposed.
Original languageEnglish
Article number111008
JournalCorrosion Science
Volume214
Early online date23 Jan 2023
DOIs
Publication statusPublished - 15 Apr 2023

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