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Short-term spinodal decomposition - its effects on corrosion behaviour of a duplex stainless steel and feasibility as a strengthening treatment
W. J. Ai1; H. C. Kuan1; J. J. Dong1; C. T. Kwok1,2; K. H. Lo1,2
2017-04
Source PublicationMATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
ISSN0947-5117
Volume68Issue:4Pages:395-404
Abstract

The present paper looks into the effects of spinodal decomposition (SD) on the corrosion resistance and cavitation erosion behaviour of the duplex stainless steel (DSS) 7MoPLUS. SD takes place at 500 degrees C in the ferrite phase at the early stage of thermal ageing, with an attendant hardness increase. Nevertheless, thermal ageing at this temperature for up to 2 days nearly does not reduce pitting potential (in 3.5% NaCl). Surface integrity, however, is degraded by the appearance of noticeable pits after just a few hours of exposure to this temperature. Ageing for 1 week at 500 degrees C does not seem to alter the corrosion morphology of the ferrite phase in 1M HCl. On the other hand, SD does bring about changes to the nature of passive film, as demonstrated by open-circuit potential measurements in 3.5% NaCl. The cavitation erosion (CE) resistance of 7MoPLUS is slightly enhanced by short-term SD treatment (for 5 h), as propagation of CE damage emanating from deformation twins in the ferrite phase is made less efficient. It is suggested that short-term SD treatment is a feasible strengthening method for DSSs.

DOIhttps://doi.org/10.1002/maco.201609158
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000398581800001
PublisherWILEY-V C H VERLAG GMBH
The Source to ArticleWOS
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorK. H. Lo
Affiliation1.Faculty of Science and Technology, Department of Electromechanical Engineering, The University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
2.Faculty of Science and Technology, Institute of Applied Physics and Materials Engineering, The University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
W. J. Ai,H. C. Kuan,J. J. Dong,et al. Short-term spinodal decomposition - its effects on corrosion behaviour of a duplex stainless steel and feasibility as a strengthening treatment[J]. MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,2017,68(4):395-404.
APA W. J. Ai,H. C. Kuan,J. J. Dong,C. T. Kwok,&K. H. Lo.(2017).Short-term spinodal decomposition - its effects on corrosion behaviour of a duplex stainless steel and feasibility as a strengthening treatment.MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION,68(4),395-404.
MLA W. J. Ai,et al."Short-term spinodal decomposition - its effects on corrosion behaviour of a duplex stainless steel and feasibility as a strengthening treatment".MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION 68.4(2017):395-404.
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