Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel
In this paper, a finite element model is developed to investigate residual stress and microstructural changes in 18CrNiMo7-6 alloy steel during pre-mixed jet strengthening. The model employs a dislocation density-based constitutive relationship, with parameters optimized via a genetic algorithm. A f...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424028734 |
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| author | MingHao Zhao HaiYang Hou FeiHu Ren Chunsheng Lu JianWei Zhang BingBing Wang |
| author_facet | MingHao Zhao HaiYang Hou FeiHu Ren Chunsheng Lu JianWei Zhang BingBing Wang |
| author_sort | MingHao Zhao |
| collection | DOAJ |
| description | In this paper, a finite element model is developed to investigate residual stress and microstructural changes in 18CrNiMo7-6 alloy steel during pre-mixed jet strengthening. The model employs a dislocation density-based constitutive relationship, with parameters optimized via a genetic algorithm. A fully coupled stress integration algorithm ensures the numerical stability. The model is validated by experiments, with a maximum error of 2.6% in predicting residual stress. It is shown that the dislocation cell sizes measured from experiments are consistent with that obtained by simulations. As the peening intensity increases, the maximum residual stress, the depth of a residual stress layer, and the thickness of a compressive residual stress layer gradually increase. The rise in residual stress is accompanied by formation of dislocation proliferation and refined microstructural layers. Additionally, the depth of a refined layer increases with a higher pre-mixed jet intensity. While the coverage increase has a minimal impact on the smallest average dislocation cell size, larger shot diameters lead to smaller dislocation cell sizes. |
| format | Article |
| id | doaj-art-edc70412d92041ffa685b5c1d52e6f04 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-edc70412d92041ffa685b5c1d52e6f042025-01-19T06:25:17ZengElsevierJournal of Materials Research and Technology2238-78542025-01-0134479489Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steelMingHao Zhao0HaiYang Hou1FeiHu Ren2Chunsheng Lu3JianWei Zhang4BingBing Wang5School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China; School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, 450001, China; Industrial Science &Technology Institute for Anti-fatigue Manufacturing, Zhengzhou, Henan, 450016, ChinaSchool of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, ChinaSchool of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, ChinaSchool of Civil and Mechanical Engineering, Curtin University, Western Australia, 6845, AustraliaSchool of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, 450001, China; Industrial Science &Technology Institute for Anti-fatigue Manufacturing, Zhengzhou, Henan, 450016, ChinaSchool of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, 450001, China; Industrial Science &Technology Institute for Anti-fatigue Manufacturing, Zhengzhou, Henan, 450016, China; Corresponding author. School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, 450001, China.In this paper, a finite element model is developed to investigate residual stress and microstructural changes in 18CrNiMo7-6 alloy steel during pre-mixed jet strengthening. The model employs a dislocation density-based constitutive relationship, with parameters optimized via a genetic algorithm. A fully coupled stress integration algorithm ensures the numerical stability. The model is validated by experiments, with a maximum error of 2.6% in predicting residual stress. It is shown that the dislocation cell sizes measured from experiments are consistent with that obtained by simulations. As the peening intensity increases, the maximum residual stress, the depth of a residual stress layer, and the thickness of a compressive residual stress layer gradually increase. The rise in residual stress is accompanied by formation of dislocation proliferation and refined microstructural layers. Additionally, the depth of a refined layer increases with a higher pre-mixed jet intensity. While the coverage increase has a minimal impact on the smallest average dislocation cell size, larger shot diameters lead to smaller dislocation cell sizes.http://www.sciencedirect.com/science/article/pii/S2238785424028734Pre-mixed jetDislocation densityResidual stressGrain refinementDislocation cell |
| spellingShingle | MingHao Zhao HaiYang Hou FeiHu Ren Chunsheng Lu JianWei Zhang BingBing Wang Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel Journal of Materials Research and Technology Pre-mixed jet Dislocation density Residual stress Grain refinement Dislocation cell |
| title | Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel |
| title_full | Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel |
| title_fullStr | Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel |
| title_full_unstemmed | Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel |
| title_short | Dislocation density-based simulation of pre-mixed jet effects on residual stress and cell size in 18CrNiMo7-6 alloy steel |
| title_sort | dislocation density based simulation of pre mixed jet effects on residual stress and cell size in 18crnimo7 6 alloy steel |
| topic | Pre-mixed jet Dislocation density Residual stress Grain refinement Dislocation cell |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424028734 |
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