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Effect of surface grinding on chloride induced SCC of 304L
KTH, School of Chemical Science and Engineering (CHE), Chemistry. Dalarna University, Falun, Sweden.
2016 (English)In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 658, 50-59 p.Article in journal (Refereed) PublishedText
Abstract [en]

The effect of surface grinding on the stress corrosion cracking (SCC) behavior of 304L austenitic stainless steel in boiling magnesium chloride has been investigated. SCC tests were conducted both without external loading and with varied levels of four-point bend loading for as-delivered material and for specimens which had been ground parallel or perpendicular to the loading direction. Residual stresses due to the grinding operation were measured using the X-ray diffraction technique. In addition, surface stress measurements under applied load were performed before exposure to evaluate the deviation between actual applied loading and calculated values according to ASTM G39. Micro-cracks initiated by a high level of tensile residual stress in the surface layer were observed for all the ground specimens but not those in the as-delivered condition. Grinding along the loading direction increased the susceptibility to chloride induced SCC; while grinding perpendicular to the loading direction improved SCC resistance. Surface tensile residual stresses were largely relieved after the initiation of cracks.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 658, 50-59 p.
Keyword [en]
Stress corrosion cracking, Residual stress, Austenitic stainless steel 304L, Grinding
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-185356DOI: 10.1016/j.msea.2016.01.078ISI: 000372560800007ScopusID: 2-s2.0-84957578682OAI: oai:DiVA.org:kth-185356DiVA: diva2:921288
Note

QC 20160420

Available from: 2016-04-20 Created: 2016-04-18 Last updated: 2016-04-20Bibliographically approved

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