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Effect of laser surface melting and subsequent re-aging on microstructure and corrosion behavior of aged S32950 duplex stainless steel
W.K. Chan1; C.T. Kwok1,2; K.H. Lo1,2
2018-03
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume207Pages:451-464
Abstract

In the present study, the microstructure and corrosion behavior of duplex stainless steel (DSS, S32950) after aging, laser surface melting (LSM) without and with subsequent re-aging were investigated. After LSM, the pitting corrosion resistance of the aged DSS was restored. It is attributed to re-dissolution and removal of M23C6, sigma and gamma(2) phases. The purpose of re-aging is to investigate the phase balance and hence corrosion performance of the laser-melted DSS after subjected to isothermal aging at 800 degrees C, a condition which might be encountered during application. Results of the present study show that the laser-melted specimens after re-aging is less susceptible to pitting corrosion because the content of gamma(2) (the anode) is close to that of sigma and delta (the cathodes). (C) 2018 Elsevier B.V. All rights reserved.

KeywordLaser Surface Modification Aging Corrosion Duplex Stainless Steel
DOIhttps://doi.org/10.1016/j.matchemphys.2018.01.007
URLView the original
Indexed BySCI
Language英语
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000425561000058
PublisherELSEVIER SCIENCE SA
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorC.T. Kwok
Affiliation1.Department of Electromechanical Engineering, University of Macau, China
2.Institute of Applied Physics and Materials Engineering, University of Macau, China
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau;  INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
W.K. Chan,C.T. Kwok,K.H. Lo. Effect of laser surface melting and subsequent re-aging on microstructure and corrosion behavior of aged S32950 duplex stainless steel[J]. MATERIALS CHEMISTRY AND PHYSICS,2018,207:451-464.
APA W.K. Chan,C.T. Kwok,&K.H. Lo.(2018).Effect of laser surface melting and subsequent re-aging on microstructure and corrosion behavior of aged S32950 duplex stainless steel.MATERIALS CHEMISTRY AND PHYSICS,207,451-464.
MLA W.K. Chan,et al."Effect of laser surface melting and subsequent re-aging on microstructure and corrosion behavior of aged S32950 duplex stainless steel".MATERIALS CHEMISTRY AND PHYSICS 207(2018):451-464.
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