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Abstract
Research & Development in Material Science
Effect of Heat Treatment on Microstructural Evolution and Mechanical Properties of a Welded Pipeline A970 Duplex Stainless Steel
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Zakaria Boumerzoug1*, Younes Gheriani1 and Fabienne Delaunois2
1LMSM, University of Biskra, Algeria
2Metallurgy Department, University of Mons, Belgium
Submission: August 12, 2022;Published: August 25, 2022
ISSN : 2576-8840Volume17 Issue4
Abstract
In this investigation, the effect of an isothermal heat treatments at 300 °C on microstructure evolution and mechanical properties of the welded pipeline A970 duplex stainless steel have been studied by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy analysis, X-ray diffraction, and hardness measurements. It was found that the fuzion zone is different from the heat affected zone and also from the base metal. The quantity of the ferritic phase decreased in the melting zone and was partially restored after the heat treatment, which has an influence on the hardness of the melting zone.
Keywords: Welding; Duplex stainless steel; Microstructures; Phases
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