Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water
A new alumina-forming austenitic oxide dispersion strengthened steel was prepared, and the general corrosion behavior was studied. The results showed that the Y2O3 addition reduced the grain size. With small grains, the grain boundary density increased, which accelerated the formation of stable oxid...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522010085 |
| _version_ | 1811292659993542656 |
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| author | Shuo Cong Yang Gao Zhu Liu Wenshan Peng Yunhao Zhang Li Ma Zhangjian Zhou Lefu Zhang Xianglong Guo |
| author_facet | Shuo Cong Yang Gao Zhu Liu Wenshan Peng Yunhao Zhang Li Ma Zhangjian Zhou Lefu Zhang Xianglong Guo |
| author_sort | Shuo Cong |
| collection | DOAJ |
| description | A new alumina-forming austenitic oxide dispersion strengthened steel was prepared, and the general corrosion behavior was studied. The results showed that the Y2O3 addition reduced the grain size. With small grains, the grain boundary density increased, which accelerated the formation of stable oxide scale in the corrosion process and obviously decreased the weight gain of AFA-ODS steel. A four-layer oxide scale was formed on the both sides of grain boundary in the inner layer, and a Cr-depletion and metallic Ni layer were formed at the oxide/matrix interface. The upper part of inner layer had many cavities. Al2O3 protective layer appeared in the inner oxide layer and the corrosion degree of the underlying material was reduced. Grain boundary migration was also induced by the element diffusion. The structure surrounding Y2O3 particles in the inner layer was affected slightly by Y2O3 particles. Y2O3 particles at the oxide/matrix interface could promote the corrosion and caused the sunken corrosion pits because the element could diffuse easily through the interface between Y2O3 particles and the material. However, with the addition of Al, Al could diffuse into the sunken pits and wrapped Y2O3 particles, which inhibited the further development of the sunken pits. |
| first_indexed | 2024-04-13T04:49:39Z |
| format | Article |
| id | doaj.art-5713012dd7364fc88e3859063b08dbb8 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-13T04:49:39Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-5713012dd7364fc88e3859063b08dbb82022-12-22T03:01:44ZengElsevierMaterials & Design0264-12752022-12-01224111386Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical waterShuo Cong0Yang Gao1Zhu Liu2Wenshan Peng3Yunhao Zhang4Li Ma5Zhangjian Zhou6Lefu Zhang7Xianglong Guo8School of Nuclear Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, PR ChinaSchool of Nuclear Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, PR ChinaSchool of Nuclear Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, PR ChinaState Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, PR ChinaState Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, PR ChinaState Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266237, PR ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, PR ChinaSchool of Nuclear Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, PR ChinaSchool of Nuclear Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, PR China; Corresponding author.A new alumina-forming austenitic oxide dispersion strengthened steel was prepared, and the general corrosion behavior was studied. The results showed that the Y2O3 addition reduced the grain size. With small grains, the grain boundary density increased, which accelerated the formation of stable oxide scale in the corrosion process and obviously decreased the weight gain of AFA-ODS steel. A four-layer oxide scale was formed on the both sides of grain boundary in the inner layer, and a Cr-depletion and metallic Ni layer were formed at the oxide/matrix interface. The upper part of inner layer had many cavities. Al2O3 protective layer appeared in the inner oxide layer and the corrosion degree of the underlying material was reduced. Grain boundary migration was also induced by the element diffusion. The structure surrounding Y2O3 particles in the inner layer was affected slightly by Y2O3 particles. Y2O3 particles at the oxide/matrix interface could promote the corrosion and caused the sunken corrosion pits because the element could diffuse easily through the interface between Y2O3 particles and the material. However, with the addition of Al, Al could diffuse into the sunken pits and wrapped Y2O3 particles, which inhibited the further development of the sunken pits.http://www.sciencedirect.com/science/article/pii/S0264127522010085Supercritical waterODS steelIntergranular corrosionAl additionDispersive Y2O3 |
| spellingShingle | Shuo Cong Yang Gao Zhu Liu Wenshan Peng Yunhao Zhang Li Ma Zhangjian Zhou Lefu Zhang Xianglong Guo Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water Materials & Design Supercritical water ODS steel Intergranular corrosion Al addition Dispersive Y2O3 |
| title | Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water |
| title_full | Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water |
| title_fullStr | Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water |
| title_full_unstemmed | Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water |
| title_short | Role of Al addition and Y2O3 on the intergranular corrosion behavior of AFA-ODS steel in the supercritical water |
| title_sort | role of al addition and y2o3 on the intergranular corrosion behavior of afa ods steel in the supercritical water |
| topic | Supercritical water ODS steel Intergranular corrosion Al addition Dispersive Y2O3 |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522010085 |
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