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)


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.


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



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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