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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Pan American Materials Congress: Materials for Oil and Gas Industry
Presentation Title High Temperature In-Situ X-ray Analysis of a Lean Duplex Stainless Steel
Author(s) Adriana C Rocha, Andrea Pedroza, Gabriela Pereira
On-Site Speaker (Planned) Adriana C Rocha
Abstract Scope Duplex Steels have been used for different applications in the oil and gas industry due to their high strength and corrosion resistance characteristics. In this work, a Lean Duplex Steel (UNS S32304) has been investigated by In-Situ X-Ray Diffraction, in order to address the phase 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 800C for different intervals of time (30min, 60min and 90 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 11% to 17 %vol. Significant increase on sigma volume was observed and different kinetics mechanisms were investigated for the 30 and 60 minute intervals.
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OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Study on the Mechanisms Responsible for Dynamic Strain Aging Phenomenon in Inconel 718 Superalloy
Adsorption of Organosulfur Compounds on Doped Boron Nitride Nanostructures
Design and Thermo-mechanical Processing of Steel Grade APIX70 PSL2 for Use in Line-pipe at Oil&Gas Industry
Dynamic Transformation and Retransformation during the Simulated Plate Rolling of an X70 Pipeline Steel
Effect of Heat Input on the Microstructure and Toughness of Welded API Pipelines
Evaluation of Non-Destructive Techniques (Thermography, Ultrasound and Eddy Current) for Detection of Failures in Metallic Substrates with Composite Anticorrosive Coatings
High Temperature In-Situ X-ray Analysis of a Lean Duplex Stainless Steel
Materials for Facilities Liquefied Petroleum Gas as NFPA
PAN-27: Blends of PVDF with Its Processing Waste: Study of the Mechanical Properties of the Blends Thermally Aged
Structural Integrity of Pipelines
The Corrosion Behavior of Newly Developed API X120 Pipeline Steel in H2S and Moderate Temperature Environments

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