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High Temperature In-Situ X-Ray Analysis of a Lean Duplex Stainless Steel

  • Adriana da Cunha RochaEmail author
  • Andrea Pedroza da Rocha Santos
  • Gabriela Ribeiro Pereira
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Duplex Steels have been used for different applications in the oil and gas industry due to their high strength and corrosion resistance. In this work, a Lean Duplex Steel (UNS S32304) has been investigated by High Temperature In-Situ X-Ray Diffraction, in order to address phases transformations occurring during high-temperature real time exposure and the formation of deleterious phases such as sigma phase. Samples were subjected to a temperature of 800 °C for different time intervals (30 and 60 min) inside a high temperature furnace attached to an x-ray diffractometer. Formation of sigma phase was observed, both in the ferrite grain boundaries and in the ferrite/austenite interface. The volume of sigma phase was measured by quantitative phase analysis using the Rietveld method and results varied from 2.80 to 15.92% in volume.

Keywords

Duplex stainless steel Sigma phase In-Situ X-ray diffraction Rietveld method 

Notes

Acknowledgements

The authors thank the LNDC for the aid granted.

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Copyright information

© The Minerals, Metals & Materials Society 2017

Authors and Affiliations

  • Adriana da Cunha Rocha
    • 1
    Email author
  • Andrea Pedroza da Rocha Santos
    • 1
  • Gabriela Ribeiro Pereira
    • 1
  1. 1.Department of Materials Sciences and MetallurgyFederal University of Rio de Janeiro (PEMM/COPPE/UFRJ)Rio de JaneiroBrazil

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