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Investigation of thermally induced deterioration processes in cold worked SAF 2507 type duplex stainless steel by DTA

Berecz, Tibor and Fazakas, Éva and Fábián, Enikő Réka and Jenei, Péter and Maróti, János Endre (2020) Investigation of thermally induced deterioration processes in cold worked SAF 2507 type duplex stainless steel by DTA. Crystals, 10 (937). pp. 1-11. ISSN 2073-4352

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Abstract

Thermally induced deterioration processes were studied in cold worked (up to 60% deformation) SAF 2507 type super-duplex stainless steel (SDSS) by differential thermal analysis (DTA). DTA results revealed two transformations. Parent and inherited phases of these transformations were examined by other methods too, such as micro-hardness tests, optical metallography and X-ray diffraction (XRD). Finally, these transformations were identified as the formation of alpha’- and sigma-phases. Formation of strain-induced martensite (SIM) and recrystallization were not experienced until 1000 °C, despite high degree of cold working. Activation energies of the sigma-phase precipitation and alpha’-phase formation were determined from the Kissinger plot, through DTA measurements — they are 275 and 220 kJ/mol, respectively — in good agreement with the values found in the literature.

Item Type: Article
Subjects: Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika
T Technology / alkalmazott, műszaki tudományok > TJ Mechanical engineering and machinery / gépészmérnöki tudományok
Depositing User: Dr. Berecz Tibor
Date Deposited: 28 Sep 2021 09:13
Last Modified: 03 Apr 2023 07:20
URI: http://real.mtak.hu/id/eprint/129563

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