σ phase dissolution in duplex stainless steel at elevated temperature studied by thermal analysis

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)3991-3994
Journal / PublicationMaterials Letters
Volume62
Issue number24
Publication statusPublished - 15 Sep 2008

Abstract

The redissolution of σ phase to ferrite in duplex stainless steel (DSS) in high temperature range was studied by differential thermal analysis (DTA) and scanning electron microscopy. DSS samples were aged at different temperatures for various durations. The conditions were chosen such that all the ferrite transformed to σ phase. Subsequent DTA measurements revealed that the onset temperature Ts and the peak temperature Tp for sigma dissolution strongly depend on the initial distribution and the morphology of σ phase. This correlation between the DTA characteristic temperatures and prior ageing temperatures may be used for temperature indication purposes in applications involving hostile environments. © 2008 Elsevier B.V. All rights reserved.

Research Area(s)

  • Metallurgy, Microstructure, Thermal properties