Effect of Thermal Aging at Low Temperature on the Mechanical Properties and Corrosion Resistance of LDX 2404 Duplex Stainless Steel

Rodrigo Silva; Carlos Alberto della Rovere; Sebastião Elias Kuri

doi:10.4028/www.scientific.net/MSF.869.705

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HomeMaterials Science ForumMaterials Science Forum Vol. 869Effect of Thermal Aging at Low Temperature on the...

Effect of Thermal Aging at Low Temperature on the Mechanical Properties and Corrosion Resistance of LDX 2404 Duplex Stainless Steel

Abstract:

It is well known that when duplex stainless steels (DSS) are subjected to temperatures ranging from 300 to 1000 °C they may undergo precipitation of several phases, which can seriously impair their mechanical properties and corrosion resistance. The present work studied the effect of thermal aging (up to 2000 h) at 475 °C on the corrosion and mechanical properties of the newly developed 2404 DSS. The evaluation was based on potentiodynamic polarization in 3.5% NaCl solution and on Charpy tests. The pitting corrosion resistance was found to decrease significantly with aging time at 475 °C. In addition, Charpy tests revealed that after 100 h of thermal aging the material becomes brittle due to the spinodal decomposition of ferrite.

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Periodical:

Materials Science Forum (Volume 869)

Pages:

705-710

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.869.705

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Online since:

August 2016

Authors:

Rodrigo Silva*, Carlos Alberto della Rovere, Sebastião Elias Kuri

Keywords:

Duplex Stainless Steel, Impact Toughness, Pitting Corrosion, Spinodal Decomposition, Thermal Aging

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