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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, Skolan för kemi, bioteknologi och hälsa (CBH), Kemi, Yt- och korrosionsvetenskap.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH).
Uddeholms AB, Res & Dev, SE-68385 Hagfors, Sweden..
Uddeholms AB, Res & Dev, SE-68385 Hagfors, Sweden..
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2019 (engelsk)Inngår i: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 148, s. 83-93Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 148, s. 83-93
Emneord [en]
Martensitic stainless steel, Residual stress, Tempering, Environment-assisted cracking, Pit-to-crack transition
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Identifikatorer
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
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QC 20190321

Tilgjengelig fra: 2019-03-21 Laget: 2019-03-21 Sist oppdatert: 2019-04-04bibliografisk kontrollert

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