| Title: | Influence of isothermal annealing in the 600 to 750 °C range on the degradation of SAF 2205 duplex stainless steel |
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| Authors: | ID Burja, Jaka (Author)
ID Žužek, Borut (Author)
ID Šetina, Barbara (Author) |
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| Files: |  PDF - Presentation file, download (20,91 MB)
MD5: 9F6F55F5C1C3B33F0D073759EDF629FC
 URL - Source URL, visit https://www.mdpi.com/2624-5558/5/3/14
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IMT - Institute of Metals and Technology
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| Abstract: | We studied the effect of isothermal annealing (600–750 °C, 1 to 1000 min) on the microstructure
and mechanical properties of SAF 2205 duplex stainless steel. Impact toughness was found
to be significantly more affected than hardness by annealing. Annealing at 750 °C for 1000 min
resulted in a more than 90% decrease in impact toughness, while hardness only increased by 25%.
Tensile strength increased up to 100 MPa, but elongation decreased by more than 50% under the
same conditions. Sigma phase formation was minimal at lower temperatures (650 °C and below)
but increased significantly at higher temperatures. At 750 °C and 1000 min of annealing, the ferrite
content dropped from 50% to 16%. These findings suggest that annealing temperature and time need
to be carefully controlled to avoid a reduction in impact toughness and ductility caused by sigma
phase precipitation. The harmful effect of sigma phase precipitation on mechanical properties was
directly shown.
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| Keywords: | duplex stainless steel, sigma phase, precipitation kinetics, mechanical properties, isothermal annealing |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 12.07.2024 |
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| Publisher: | MDPI |
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| Year of publishing: | 2024 |
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| Number of pages: | str. 340-349 |
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| Numbering: | Vol. 5, iss. 3 |
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| Source: | Švica |
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| PID: | 20.500.12556/DiRROS-19729  |
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| UDC: | 669.14.018.8-153:620.1 |
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| ISSN on article: | 2624-5558 |
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| DOI: | 10.3390/cmd5030014 |
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| COBISS.SI-ID: | 202622979 |
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| Copyright: | © 2024 by the authors |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 24. 7. 2024;
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| Publication date in DiRROS: | 24.07.2024 |
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| Views: | 936 |
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| Downloads: | 692 |
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