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Cavitation Erosion Damage Mechanism of a Duplex Stainless Steel Having a Ferrite-Austenite-Sigma-Phase Triplex Microstructure
Wenji Ai1; K.H. Lo1,2; Xiang Li2; C.T. Kwok1,2; Hui Pan2,3
2020-04-27
Source PublicationJournal of Materials Engineering and Performance
ISSN1059-9495
Volume29Issue:5Pages:2806-2815
Other Abstract

This paper is on the cavitation erosion (CE) behavior of a thermally annealed duplex stainless steel having a triplex microstructure consisting of ferrite, austenite and sigma phase. As sigma forms, it siphons off alloying elements from ferrite, making it softer. Ferrite is the weakest against CE among the three phases, and its interfaces with sigma phase are often the initiation sites of damage which tends to grow into the ferrite side. The weakness of ferrite stems from its high strain-rate sensitivity. Austenite is beneficial because it helps to prevent sigma phase from being dislodged, and its interfaces with sigma phase are also more resistant to CE damage. Mechanical properties such as hardness and strength do not correlate with CE resistance (as measured by cumulative weight loss and the incubation time of CE damage). Preliminary results show that cumulative weight loss is not monotonically proportional to the quantity of sigma.

KeywordAustenite Cavitation Erosion Duplex Stainless Steel Ferrite Sigma Phase
DOI10.1007/s11665-020-04807-9
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000529326100004
Scopus ID2-s2.0-85084217485
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorK.H. Lo
Affiliation1.Department of Electromechanical Engineering,Faculty of Science and Technology,The University of Macau,Macao
2.Institute of Applied Physics and Materials Engineering,The University of Macau,Macao
3.Department of Physics and Chemistry,Faculty of Science and Technology,University of Macau,Macao
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology;  INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Wenji Ai,K.H. Lo,Xiang Li,et al. Cavitation Erosion Damage Mechanism of a Duplex Stainless Steel Having a Ferrite-Austenite-Sigma-Phase Triplex Microstructure[J]. Journal of Materials Engineering and Performance,2020,29(5):2806-2815.
APA Wenji Ai,K.H. Lo,Xiang Li,C.T. Kwok,&Hui Pan.(2020).Cavitation Erosion Damage Mechanism of a Duplex Stainless Steel Having a Ferrite-Austenite-Sigma-Phase Triplex Microstructure.Journal of Materials Engineering and Performance,29(5),2806-2815.
MLA Wenji Ai,et al."Cavitation Erosion Damage Mechanism of a Duplex Stainless Steel Having a Ferrite-Austenite-Sigma-Phase Triplex Microstructure".Journal of Materials Engineering and Performance 29.5(2020):2806-2815.
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