Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels
The solution treating and cooling experiments were conducted to study the microstructure and mechanical properties of Al modified super ferritic stainless steels with various cooling methods. The results demonstrated that the grain was characterized by the stratified distribution. The grain coarsene...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423007585 |
| _version_ | 1797798813203693568 |
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| author | Jian-Shan Han Hui-Hu Lu Ze-Zhou Xing Bing Yang Yi-Nan Wang Ling-Yun Du Mei-Ni Yuan |
| author_facet | Jian-Shan Han Hui-Hu Lu Ze-Zhou Xing Bing Yang Yi-Nan Wang Ling-Yun Du Mei-Ni Yuan |
| author_sort | Jian-Shan Han |
| collection | DOAJ |
| description | The solution treating and cooling experiments were conducted to study the microstructure and mechanical properties of Al modified super ferritic stainless steels with various cooling methods. The results demonstrated that the grain was characterized by the stratified distribution. The grain coarsened gradually with the decrease in cooling rate. And the surface grain coarsened obviously, Nb (C, N) particles were precipitated in the samples in different cooling manners. However, the Laves phase was distributed both at the grain boundaries and in the grains in the furnace-cooled specimen, and the area fraction of Laves phase increased significantly with the increase of Al content. With the cooling rate decreased, the yield strength, ultimate tensile strength and Vickers hardness of the Al-free samples increased, while the elongation decreased, and the furnace-cooled specimens showed brittle fracture during the tensile test. The addition of Al also increased yield strength, ultimate tensile strength and Vickers hardness and deteriorated plasticity of samples with different cooling manners. Meanwhile, the plasticity of furnace-cooled samples was more sensitive to addition of Al than water-quenched and air-cooled specimens. The analysis results showed that the plastic deterioration of furnace-cooled samples was mainly related to the coarsening of Laves phase at grain boundaries. Hence, the precipitation of large size Laves phase at grain boundaries should be inhibited in the process of industrial production. |
| first_indexed | 2024-03-13T04:09:32Z |
| format | Article |
| id | doaj.art-98e7f397b1ae4493bdef733ca78606e6 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:09:32Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-98e7f397b1ae4493bdef733ca78606e62023-06-21T06:56:37ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012442584270Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steelsJian-Shan Han0Hui-Hu Lu1Ze-Zhou Xing2Bing Yang3Yi-Nan Wang4Ling-Yun Du5Mei-Ni Yuan6School of Mechanical Engineering, North University of China, Taiyuan 030051, PR ChinaSchool of Mechanical Engineering, North University of China, Taiyuan 030051, PR China; Corresponding author.School of Mechanical Engineering, North University of China, Taiyuan 030051, PR ChinaSchool of Mechanical Engineering, North University of China, Taiyuan 030051, PR ChinaSchool of Mechanical Engineering, North University of China, Taiyuan 030051, PR ChinaSchool of Environment and Safety Engineering, North University of China, Taiyuan 030051, PR China; Corresponding author.School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, PR ChinaThe solution treating and cooling experiments were conducted to study the microstructure and mechanical properties of Al modified super ferritic stainless steels with various cooling methods. The results demonstrated that the grain was characterized by the stratified distribution. The grain coarsened gradually with the decrease in cooling rate. And the surface grain coarsened obviously, Nb (C, N) particles were precipitated in the samples in different cooling manners. However, the Laves phase was distributed both at the grain boundaries and in the grains in the furnace-cooled specimen, and the area fraction of Laves phase increased significantly with the increase of Al content. With the cooling rate decreased, the yield strength, ultimate tensile strength and Vickers hardness of the Al-free samples increased, while the elongation decreased, and the furnace-cooled specimens showed brittle fracture during the tensile test. The addition of Al also increased yield strength, ultimate tensile strength and Vickers hardness and deteriorated plasticity of samples with different cooling manners. Meanwhile, the plasticity of furnace-cooled samples was more sensitive to addition of Al than water-quenched and air-cooled specimens. The analysis results showed that the plastic deterioration of furnace-cooled samples was mainly related to the coarsening of Laves phase at grain boundaries. Hence, the precipitation of large size Laves phase at grain boundaries should be inhibited in the process of industrial production.http://www.sciencedirect.com/science/article/pii/S2238785423007585Super-ferritic stainless steelAl additionsCooling mannerLaves phaseGrain sizeMechanical properties |
| spellingShingle | Jian-Shan Han Hui-Hu Lu Ze-Zhou Xing Bing Yang Yi-Nan Wang Ling-Yun Du Mei-Ni Yuan Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels Journal of Materials Research and Technology Super-ferritic stainless steel Al additions Cooling manner Laves phase Grain size Mechanical properties |
| title | Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels |
| title_full | Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels |
| title_fullStr | Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels |
| title_full_unstemmed | Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels |
| title_short | Effects of cooling manner on Laves phase precipitation and mechanical properties of Al modified super ferritic stainless steels |
| title_sort | effects of cooling manner on laves phase precipitation and mechanical properties of al modified super ferritic stainless steels |
| topic | Super-ferritic stainless steel Al additions Cooling manner Laves phase Grain size Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423007585 |
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