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Effects of pre-treatment on the ac magnetic susceptibility and ageing behaviour of duplex stainless steels
Lo K.H.1,2; Lai J.K.L.1; Shek C.H.1; Li D.J.3
2007-04-15
Source PublicationMaterials Science and Engineering A
ISSN09215093
Volume452-453Pages:78-86
Abstract

All duplex stainless steel samples used for experimental work must be solution treated before any subsequent tests are performed on them. In this work, the effects of solution treatment parameters (temperature and soaking duration) and plastic deformation on the ageing behaviour and ac magnetic susceptibility of two duplex stainless steels, which differ in composition, morphology and ferrite content, have been investigated. Effects of different pre-treatments on the morphology, composition and stability of the ferrite phase have been studied, too. The use of ac magnetic susceptibility for the measurement of ferrite content is feasible, but the effect of plastic deformation must be properly accounted for, or else the ferrite content may be underestimated. The ac susceptibility is dependent upon the composition of the ferrite phase. Dissolution of the ferrite in the range of 650-800 °C obeys the Johnson-Mehl-Avrami equation. Raising the solution treatment temperature may increase the activation energy for transformation. For samples used in most experimental work, performing a very long solution treatment may not be necessary. © 2006 Elsevier B.V. All rights reserved.

KeywordAc Susceptibility Duplex Stainless Steel Ferrite Measurement Johnson-mehl-avrami Equation Solution Treatment
DOI10.1016/j.msea.2006.10.120
URLView the original
Indexed BySCI
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000245639800011
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Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
2.Department of Electromechanical Engineering, University of Macau, Macau, China
3.Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Lo K.H.,Lai J.K.L.,Shek C.H.,et al. Effects of pre-treatment on the ac magnetic susceptibility and ageing behaviour of duplex stainless steels[J]. Materials Science and Engineering A,2007,452-453:78-86.
APA Lo K.H.,Lai J.K.L.,Shek C.H.,&Li D.J..(2007).Effects of pre-treatment on the ac magnetic susceptibility and ageing behaviour of duplex stainless steels.Materials Science and Engineering A,452-453,78-86.
MLA Lo K.H.,et al."Effects of pre-treatment on the ac magnetic susceptibility and ageing behaviour of duplex stainless steels".Materials Science and Engineering A 452-453(2007):78-86.
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