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Residual Stress in Stainless Steels after Surface Grinding and its Effect on Chloride Induced SCC
KTH, School of Chemical Science and Engineering (CHE), Chemistry. Dalarna University, Sweden.
KTH, School of Chemical Science and Engineering (CHE), Chemistry. Jernkontoret, Sweden.
2017 (English)In: Residual Stresses  2016: ICRS-10 / [ed] Holden, TM Muransky, O Edwards, L, Materials Research Forum LLC , 2017, 289-294 p.Conference paper, Published paper (Refereed)
Abstract [en]

The induced residual stresses in stainless steels as a consequence of surface grinding as well as their influence on the chloride induced stress corrosion cracking (SCC) susceptibility have been investigated. Three types of materials were studied: 304L austenitic stainless steel, 4509 ferritic stainless steel and 2304 duplex stainless steel. Surface grinding using 60# and 180# grit size abrasives was performed for each material. Residual stress depth profiles were measured using X-ray diffraction. The susceptibility to stress corrosion cracking was evaluated in boiling MgCl2 according to ASTM G36. Specimens were exposed without applying any external loading to evaluate the risk for SCC caused solely by residual stresses. Induced residual stresses and corrosion behavior were compared between the austenitic, ferritic and duplex stainless steels to elucidate the role of the duplex structure. For all materials, the grinding operation generated tensile residual stresses in the surface along the grinding direction but compressive residual stresses perpendicular to the grinding direction. In the subsurface region, compressive stresses in both directions were present. Micro cracks initiated due to high grinding-induced tensile residual stresses in the surface layer were observed in austenitic 304L and duplex 2304, but not in the ferritic 4509. The surface residual stresses decreased significantly after exposure for all specimens.

Place, publisher, year, edition, pages
Materials Research Forum LLC , 2017. 289-294 p.
Series
Materials Research Proceedings, ISSN 2474-395X ; 2
Keyword [en]
Grinding, Stainless Steel, Residual Stress, Stress Corrosion Cracking
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-208594DOI: 10.21741/9781945291173-49ISI: 000401041500049ISBN: 978-1-9452-9116-6 (print)OAI: oai:DiVA.org:kth-208594DiVA: diva2:1108215
Conference
10th International Conference on Residual Stresses (ICRS-10), JUL 03-07, 2016, Sydney, Australia
Note

QC 20170612

Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2017-06-12Bibliographically approved

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CiteExportLink to record
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  • apa
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