SwRK-VERSUCHE UND RISSEINLEITUNGSUNTERSUCHUNGEN AM NEUENTWICKELTEN DUPLEXSTAHL X 3 CrMnNiMoN 25 6 4 IM VERGLEICH ZUM BEKANNTEN FERRITISCH-AUSTENITISCHEN STAHL X 2 CrNiMoN 22 5.

Translated title of the contribution: Investigation into Corrosion Fatigue and Crack Initiation with the Newly Developed Duplex Steel X 3 CrMnNiMoN 25 6 4 by Comparison with the Known Ferritic-Austenitic Steel X 2 CrNiMoN 22 5.

Kh G. Schmitt-Thomas, R. Wunderlich, H. Meisel, R. Simon

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The majority of low pressure steam turbine damages are caused by corrosion fatigue. This kind of damage occurs primarily in the Wilson-zone of steam turbine machines. In spite of careful feed water washing there is still a build-up of damaging chloride-containing water impurities on the turbine blades. Recent investigations of duplex stainless-steels, especially the steel X 3 CrMnNiMoN 25 6 4 (A905; austenite/ferrite equals 50/50) show both a good corrosion behavior and a sufficient strength of this type of steel. In the present investigations the dependence on the corrosion fatigue limit on the pH-value, chloride concentration, temperature and the behavior of corrosion cracking (crack initiation) is evaluated.

Translated title of the contributionInvestigation into Corrosion Fatigue and Crack Initiation with the Newly Developed Duplex Steel X 3 CrMnNiMoN 25 6 4 by Comparison with the Known Ferritic-Austenitic Steel X 2 CrNiMoN 22 5.
Original languageGerman
Pages (from-to)614-622
Number of pages9
JournalMaterials and Corrosion
Volume38
Issue number10
StatePublished - Oct 1987

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