Microprocesses in stress corrosion crack initiation in austenitic stainless steels

Hannu Hänninen, Irina Aho-mantila

Research output: Contribution to journalArticleScientific

10 Citations (Scopus)

Abstract

The initiation of stress-corrosion cracks in austenitic stainless steels in hot chloride solutions, hot oxygenated water, and room-temperature acid solutions has been examined. The initiation processes have been characterized by electron microscopy and X-ray microanalysis. Corrosion crevices consisting of Cr-rich corrosion sponge have been found in all the systems studied. The electrochemical reactions of corrosion-sponge formation are clarified. Some effects of the underlying metallurgical structure on corrosion-crevice morphology are also presented. Finally, the differences between the crack initiation and propagation stages are discussed.
Original languageEnglish
Pages (from-to)109-116
JournalMetals Technology
Volume9
Issue number2
DOIs
Publication statusPublished - 1982
MoE publication typeB1 Article in a scientific magazine
EventConf. on Defects and Crack Initiation in Environment Sensitive Fracture. Newcastle, UK, 12 - 14 Jan. 1981 -
Duration: 1 Jan 1982 → …

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Austenitic stainless steel
Crack initiation
Corrosion
Electron microscopy
Chlorides
Crack propagation
Cracks
X rays
Acids
Water
Temperature

Cite this

Hänninen, Hannu ; Aho-mantila, Irina. / Microprocesses in stress corrosion crack initiation in austenitic stainless steels. In: Metals Technology. 1982 ; Vol. 9, No. 2. pp. 109-116.
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Microprocesses in stress corrosion crack initiation in austenitic stainless steels. / Hänninen, Hannu; Aho-mantila, Irina.

In: Metals Technology, Vol. 9, No. 2, 1982, p. 109-116.

Research output: Contribution to journalArticleScientific

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AB - The initiation of stress-corrosion cracks in austenitic stainless steels in hot chloride solutions, hot oxygenated water, and room-temperature acid solutions has been examined. The initiation processes have been characterized by electron microscopy and X-ray microanalysis. Corrosion crevices consisting of Cr-rich corrosion sponge have been found in all the systems studied. The electrochemical reactions of corrosion-sponge formation are clarified. Some effects of the underlying metallurgical structure on corrosion-crevice morphology are also presented. Finally, the differences between the crack initiation and propagation stages are discussed.

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