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Experimental and modelling study of the effect of tempering on the susceptibility to environment-assisted cracking of AISI 420 martensitic stainless steel
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Surface and Corrosion Science.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
Uddeholms AB, Res & Dev, SE-68385 Hagfors, Sweden..
Uddeholms AB, Res & Dev, SE-68385 Hagfors, Sweden..
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2019 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 148, p. 83-93Article in journal (Refereed) Published
Abstract [en]

The resistance to environment-assisted cracking (EAC) of AISI 420 martensitic stainless steel (MSS) was investigated in 0.3 M NaCl solution (room temperature) at constant loads for 30 days. The steel tempered at 250 degrees C was superior to the 500 degrees C-temper, which showed corrosion pits favouring cracking. The fracture surface showed faceted grains, cleavage, striations, and inter- and transgranular cracks, suggesting a mixed stress corrosion cracking (SCC) and hydrogen embrittlement (HE) mechanism as the cause for EAC. Finite element modelling (FEM) indicated strain/stress localization at the mouth of deep pits and at the wall of shallow pits, displaying the favoured locations for pit-to-crack transition.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 148, p. 83-93
Keywords [en]
Martensitic stainless steel, Residual stress, Tempering, Environment-assisted cracking, Pit-to-crack transition
National Category
Corrosion Engineering
Identifiers
URN: urn:nbn:se:kth:diva-244485DOI: 10.1016/j.corsci.2018.12.010ISI: 000457950400009Scopus ID: 2-s2.0-85058373436OAI: oai:DiVA.org:kth-244485DiVA, id: diva2:1298062
Note

QC 20190321

Available from: 2019-03-21 Created: 2019-03-21 Last updated: 2019-04-04Bibliographically approved

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Anantha, Krishnan HariramabadranÖrnek, CemPan, Jinshan

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Surface and Corrosion ScienceSchool of Engineering Sciences in Chemistry, Biotechnology and Health (CBH)Materials Science and Engineering
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