Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition
Rare earth (RE) elements not only modify inclusions but also refine the steel's microstructure. This study investigates the evolution mechanism of cerium on inclusions and microstructure in low-alloy cast steel through experimental and thermodynamic analyses. After cerium is added to the steel,...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424020921 |
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| author | Long Zhao Ganchao Zhai Jiadong Wu Xiangru Chen Qijie Zhai |
| author_facet | Long Zhao Ganchao Zhai Jiadong Wu Xiangru Chen Qijie Zhai |
| author_sort | Long Zhao |
| collection | DOAJ |
| description | Rare earth (RE) elements not only modify inclusions but also refine the steel's microstructure. This study investigates the evolution mechanism of cerium on inclusions and microstructure in low-alloy cast steel through experimental and thermodynamic analyses. After cerium is added to the steel, strip-like inclusions transform into spherical ones, accompanied by a reduction in size. The evolution path of inclusions follows MnS + MnS–Al2O3→Ce2O2S–Ce2S3–MnS + CeAlO3–Ce2S3–MnS with cerium addition. Notably, Ce2S3 and Ce2O2S exhibit an orientation relationship, with [1‾ 22]Ce2S3//[01 1‾ 1]Ce2O2S and (02 2‾)Ce2S3//(1‾ 011)Ce2O2S. Compared to Ce-free steel, the Ce-0.06 steel shows a reduced grain size and the absence of needle-shaped Widmanstätten structures, which may be mainly attributed to rare earth inclusions as heterogeneous nucleation of δ-Fe. This work can provide a theoretical basis for improving the overall mechanical properties of low-alloy cast steel by adding cerium. |
| format | Article |
| id | doaj-art-3c856a8d00744fdf9683a93fa4c9895d |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-3c856a8d00744fdf9683a93fa4c9895d2024-12-26T08:53:40ZengElsevierJournal of Materials Research and Technology2238-78542024-11-0133929939Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium additionLong Zhao0Ganchao Zhai1Jiadong Wu2Xiangru Chen3Qijie Zhai4Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR ChinaCorresponding author.; Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR ChinaCorresponding author.; Center for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR ChinaRare earth (RE) elements not only modify inclusions but also refine the steel's microstructure. This study investigates the evolution mechanism of cerium on inclusions and microstructure in low-alloy cast steel through experimental and thermodynamic analyses. After cerium is added to the steel, strip-like inclusions transform into spherical ones, accompanied by a reduction in size. The evolution path of inclusions follows MnS + MnS–Al2O3→Ce2O2S–Ce2S3–MnS + CeAlO3–Ce2S3–MnS with cerium addition. Notably, Ce2S3 and Ce2O2S exhibit an orientation relationship, with [1‾ 22]Ce2S3//[01 1‾ 1]Ce2O2S and (02 2‾)Ce2S3//(1‾ 011)Ce2O2S. Compared to Ce-free steel, the Ce-0.06 steel shows a reduced grain size and the absence of needle-shaped Widmanstätten structures, which may be mainly attributed to rare earth inclusions as heterogeneous nucleation of δ-Fe. This work can provide a theoretical basis for improving the overall mechanical properties of low-alloy cast steel by adding cerium.http://www.sciencedirect.com/science/article/pii/S2238785424020921CeriumInclusionMicrostructureCast steelMicroalloying |
| spellingShingle | Long Zhao Ganchao Zhai Jiadong Wu Xiangru Chen Qijie Zhai Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition Journal of Materials Research and Technology Cerium Inclusion Microstructure Cast steel Microalloying |
| title | Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition |
| title_full | Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition |
| title_fullStr | Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition |
| title_full_unstemmed | Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition |
| title_short | Evolution mechanism of inclusions and microstructure in low-alloy cast steel with cerium addition |
| title_sort | evolution mechanism of inclusions and microstructure in low alloy cast steel with cerium addition |
| topic | Cerium Inclusion Microstructure Cast steel Microalloying |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424020921 |
| work_keys_str_mv | AT longzhao evolutionmechanismofinclusionsandmicrostructureinlowalloycaststeelwithceriumaddition AT ganchaozhai evolutionmechanismofinclusionsandmicrostructureinlowalloycaststeelwithceriumaddition AT jiadongwu evolutionmechanismofinclusionsandmicrostructureinlowalloycaststeelwithceriumaddition AT xiangruchen evolutionmechanismofinclusionsandmicrostructureinlowalloycaststeelwithceriumaddition AT qijiezhai evolutionmechanismofinclusionsandmicrostructureinlowalloycaststeelwithceriumaddition |