Dilatometry and corrosion resistance evaluation of superduplex stainless steel uns 32750

Authors

  • Dimitry V. Bubnoff Universidad Federal Fluminense

DOI:

https://doi.org/10.5944/ribim.26.2.42167

Keywords:

Superduplex Stainless Steel, Dilatometry, Corrosion Resistance

Abstract

During heat treatment in the stainless steels can occur precipitation of undesirable phases, which cause the reduction of corrosion resistance due to formation of regions depleted particularly of Cr and Mo, as well as significant changes in mechanical properties. The reduction of corrosion resistance and embrittlement caused by small volume fraction of sigma phase in the microstructure are widely discussed in the literature, note however that there is great variability of results, thus, it becomes essential to study the sigma phase formation, aiming to predict the microstructural changes after certain thermal history and as a consequence the corrosion resistance.

This work approached the matter of sigma phase formation of 2 independent ways: dilatometric trials and corrosion tests. In this study it was found that, the phase transformations occur predominantly in the temperature range between 800°C and 900°C, where the sigma phase precipitation was observed in the steel UNS 32750.

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Published

2022-10-01

How to Cite

Bubnoff, D. V. (2022). Dilatometry and corrosion resistance evaluation of superduplex stainless steel uns 32750. Revista Iberoamericana de Ingeniería Mecánica, 26(2), 37–45. https://doi.org/10.5944/ribim.26.2.42167

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