Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C
In order to investigate the effect of phase separation (PS) on the super duplex stainless steel SAF 2507, the evolution of the nanostructure, mechanical properties, and corrosion resistance of the alloy was studied after aging at 500 °C for 1, 10, 100, and 1000 h. The nanostructure of PS was quantit...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/13/2/243 |
| _version_ | 1797621573644976128 |
|---|---|
| author | Ye Yuan Sui Yuan Yifei Wang Qikang Li Zize Deng Yinsong Xie Yubin Ke Jian Xu Hongying Yu Dongbai Sun Xin Xu |
| author_facet | Ye Yuan Sui Yuan Yifei Wang Qikang Li Zize Deng Yinsong Xie Yubin Ke Jian Xu Hongying Yu Dongbai Sun Xin Xu |
| author_sort | Ye Yuan |
| collection | DOAJ |
| description | In order to investigate the effect of phase separation (PS) on the super duplex stainless steel SAF 2507, the evolution of the nanostructure, mechanical properties, and corrosion resistance of the alloy was studied after aging at 500 °C for 1, 10, 100, and 1000 h. The nanostructure of PS was quantitatively characterized by small-angle neutron scattering. The hardness, impact toughness, and pitting corrosion resistance were measured for different conditions. The results show that the early stage of PS had a more significant impact on the nanostructure and properties of SAF 2507. The fracture behavior of the alloy was likely determined by the mechanical properties of ferrite for aged conditions. The pitting corrosion resistance of SAF 2507 aged at 500 °C was closely related to the Cr depletion caused by PS, and the resistance became weaker with the progression of PS. The evolution of the passivation region with aging time correlated well with that of mechanical properties and characteristic parameters of PS, indicating that it is possible to develop a new nondestructive electrochemical method to quantify the evolution of PS in SAF 2507. |
| first_indexed | 2024-03-11T08:57:55Z |
| format | Article |
| id | doaj.art-6fedc379c0dc40b4be15bcc3a4408490 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-11T08:57:55Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-6fedc379c0dc40b4be15bcc3a44084902023-11-16T19:55:28ZengMDPI AGCrystals2073-43522023-01-0113224310.3390/cryst13020243Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °CYe Yuan0Sui Yuan1Yifei Wang2Qikang Li3Zize Deng4Yinsong Xie5Yubin Ke6Jian Xu7Hongying Yu8Dongbai Sun9Xin Xu10School of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSpallation Neutron Source Science Center, Dongguan 523803, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaSouthern Marine Science and Engineering Guangdong Laboratory, Zhuhai 519000, ChinaSchool of Materials, Sun Yat-sen University, Shenzhen 518107, ChinaIn order to investigate the effect of phase separation (PS) on the super duplex stainless steel SAF 2507, the evolution of the nanostructure, mechanical properties, and corrosion resistance of the alloy was studied after aging at 500 °C for 1, 10, 100, and 1000 h. The nanostructure of PS was quantitatively characterized by small-angle neutron scattering. The hardness, impact toughness, and pitting corrosion resistance were measured for different conditions. The results show that the early stage of PS had a more significant impact on the nanostructure and properties of SAF 2507. The fracture behavior of the alloy was likely determined by the mechanical properties of ferrite for aged conditions. The pitting corrosion resistance of SAF 2507 aged at 500 °C was closely related to the Cr depletion caused by PS, and the resistance became weaker with the progression of PS. The evolution of the passivation region with aging time correlated well with that of mechanical properties and characteristic parameters of PS, indicating that it is possible to develop a new nondestructive electrochemical method to quantify the evolution of PS in SAF 2507.https://www.mdpi.com/2073-4352/13/2/243duplex stainless steelphase separationsmall-angle neutron scattering (SANS)corrosion resistancemechanical properties |
| spellingShingle | Ye Yuan Sui Yuan Yifei Wang Qikang Li Zize Deng Yinsong Xie Yubin Ke Jian Xu Hongying Yu Dongbai Sun Xin Xu Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C Crystals duplex stainless steel phase separation small-angle neutron scattering (SANS) corrosion resistance mechanical properties |
| title | Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C |
| title_full | Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C |
| title_fullStr | Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C |
| title_full_unstemmed | Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C |
| title_short | Nanostructure, Mechanical Properties, and Corrosion Resistance of Super Duplex Stainless Steel 2507 Aged at 500 °C |
| title_sort | nanostructure mechanical properties and corrosion resistance of super duplex stainless steel 2507 aged at 500 °c |
| topic | duplex stainless steel phase separation small-angle neutron scattering (SANS) corrosion resistance mechanical properties |
| url | https://www.mdpi.com/2073-4352/13/2/243 |
| work_keys_str_mv | AT yeyuan nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT suiyuan nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT yifeiwang nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT qikangli nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT zizedeng nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT yinsongxie nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT yubinke nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT jianxu nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT hongyingyu nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT dongbaisun nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c AT xinxu nanostructuremechanicalpropertiesandcorrosionresistanceofsuperduplexstainlesssteel2507agedat500c |