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Microstructural changes in SAF 2507 superduplex stainless steel produced by thermal cycle

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      Abstract

      This research work studies the microstructural changes in SAF 2507 superduplex stainless steel after thermal cycle in the range from 200 to 900°C for 20 minutes. The results showed there is no microstructural change in the temperature range of 200-700°C. However, over 800°C the sigma phase precipitates; the percentage of this phase increases with temperature. Sigma phase precipitates at the boundaries of δ/δ and δ/γ. The experimental results also showed precipitation of small particles of sigma phase at 900°C all over the microstructure showing the initial stages of formation.

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      Most cited references 9

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      The relationship between chromium nitride and secondary austenite precipitation in duplex stainless steels

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        Comparative study on sigma phase precipitation of three types of stainless steels: austenitic, superferritic and duplex

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          Direct Observations of Sigma Phase Formation in Duplex Stainless Steels Using In-Situ Synchrotron X-Ray Diffraction

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            Author and article information

            Affiliations
            [1 ] UMSNH
            [2 ] Instituto Mexicano del Petróleo México
            [3 ] UMSNH
            Contributors
            Role: ND
            Role: ND
            Role: ND
            Journal
            rmat
            Matéria (Rio de Janeiro)
            Matéria (Rio J.)
            Rede Latino-Americana de Materiais (Rio de Janeiro )
            1517-7076
            2009
            : 14
            : 3
            : 1061-1069
            S1517-70762009000300017
            10.1590/S1517-70762009000300017

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Brazil
            Categories
            CONSTRUCTION & BUILDING TECHNOLOGY
            MATERIALS SCIENCE, MULTIDISCIPLINARY
            METALLURGY & METALLURGICAL ENGINEERING

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