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SCC of 2304 Duplex Stainless Steel - Microstructure, Residual Stress and Surface Grinding Effects
Dept of Materials Science, Dalarna University, Sweden.
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering.
Corrosion Dept, Avesta Research Centre, Outokumpu Stainless AB, Avesta.
KTH och Jernkontoret, Stockholm.
2017 (English)In: Materials, ISSN 1996-1944, Vol. 10, no 221Article in journal (Refereed) Published
Abstract [en]

The influence of surface grinding and microstructure on chloride induced stress corrosion cracking (SCC) behavior of 2304 duplex stainless steel has been investigated. Grinding operations were performed both parallel and perpendicular to the rolling direction of the material. SCC tests were conducted in boiling magnesium chloride according to ASTM G36; specimens were exposed both without external loading and with varied levels of four-point bend loading. Residual stresses were measured on selected specimens before and after exposure using the X-ray diffraction technique. In addition, in-situ surface stress measurements subjected to four-point bend loading were performed to evaluate the deviation between the actual applied loading and the calculated values according to ASTM G39. Micro-cracks, initiated by grinding induced surface tensile residual stresses, were observed for all the ground specimens but not on the as-delivered surfaces. Loading transverse to the rolling direction of the material increased the susceptibility to chloride induced SCC. Grinding induced tensile residual stresses and micro-notches in the as-ground surface topography were also detrimental.

Place, publisher, year, edition, pages
MDPI , 2017. Vol. 10, no 221
Keyword [en]
stress corrosion cracking, duplex stainless steel 304, microstructure, residual stress, grinding
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-134975DOI: 10.3390/ma10030221ISI: 000400863500004OAI: oai:DiVA.org:liu-134975DiVA: diva2:1078623
Available from: 2017-03-06 Created: 2017-03-06 Last updated: 2017-06-13

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • asciidoc
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