GOULART, F.ICHIKAWA, R.U.TURRILLAS, X.MARTINEZ, L.G.2020-06-012020-06-01GOULART, F.; ICHIKAWA, R.U.; TURRILLAS, X.; MARTINEZ, L.G. Study on the microstructure of UNS S32304 duplex steel submitted to heat-treatments. In: ENCONTRO CIENTÍFICO DE FÍSICA APLICADA, 8., 4-7 de setembro, 2017, Vitória, ES. <b>Anais...</b> São Paulo, SP: Blucher Proceedings, 2017. p. 45-48. DOI: <a href="https://dx.doi.org/10.5151/phypro-viii-efa-12">10.5151/phypro-viii-efa-12</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31227.http://repositorio.ipen.br/handle/123456789/31227Duplex stainless steels are characterized by a good combination of mechanical properties and corrosion resistance. Due to the metastable equilibrium between the ferritic (α) and austenitic (γ) phases, significant changes in the microstructure of these steels may occur when subjected to temperatures higher than the ambient, degrading their properties. In this work, it was investigated the influence of heat treatments on the microstructure and mechanical properties of a duplex stainless steel UNS-S32304. The heat-treatments were performed at four temperatures (300°C, 600°C, 900°C and 1000°C) with two treatment times (1 h and 6 h) and two processes of cooling down (in air and water). The samples were studied by X-ray diffraction using Pawley method to determine the lattice parameters, mean crystallite sizes and microstrain for the two phases and compared to Vickers microhardness results.45-48openAccessmicrostructurestainless steelsmicrohardnessvickers hardnessTexto completo de evento10.5151/phypro-viii-efa-120000-0001-7707-7821https://orcid.org/0000-0001-7707-7821