Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy
In this work, the hot deformation behavior and microstructure evolution of ZK60 alloy are investigated. Meanwhile, constructive models and hot processing maps of ZK60 alloy during thermal tension are also established. Toward these ends, thermal tensile tests were performed at elevated deformation te...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-01-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2023.1334815/full |
| _version_ | 1827387683780952064 |
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| author | Fangjia Liu Fangjia Liu Chong Yang Chong Yang Zijun Liao Hairui Wu |
| author_facet | Fangjia Liu Fangjia Liu Chong Yang Chong Yang Zijun Liao Hairui Wu |
| author_sort | Fangjia Liu |
| collection | DOAJ |
| description | In this work, the hot deformation behavior and microstructure evolution of ZK60 alloy are investigated. Meanwhile, constructive models and hot processing maps of ZK60 alloy during thermal tension are also established. Toward these ends, thermal tensile tests were performed at elevated deformation temperatures (523 K–673 K) and wide-ranging strain rates (0.0005 s−1 to 0.1 s−1). The findings indicated that as the tensile temperature increases and the strain rate decreases, the flow stress exhibited a decrease. To better evaluate the flow behavior of the alloy, Arrhenius model coupled strain effects and particle swarm optimization support vector machine (PSO-SVM) regression model are developed. Both the developed Arrhenius model and PSO-SVM regression model could depict the flow stress of the hot deformation ZK60 alloy. However, the results comparison revealed that the PSO-SVM regression model provides a more accurate prediction of the stress in the studied alloy with the AARE and R of 1.12% and 0.9984, respectively. The microstructure observation revealed that the primary softening mechanism in the alloy is predominantly dynamic recrystallization (DRX). Using the created hot processing map, the stability processing areas for this alloy were concentrated in the range of 573 K–653 K with a strain rate of 0.001 s-1 to 0.08 s-1. The described model is implemented in the finite element software. Then, the wire-drawing process of ZK60 alloy is also simulated. |
| first_indexed | 2024-03-08T16:06:47Z |
| format | Article |
| id | doaj.art-cf0ec08381254014ad3e0a96cc4d6236 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-03-08T16:06:47Z |
| publishDate | 2024-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-cf0ec08381254014ad3e0a96cc4d62362024-01-08T05:54:16ZengFrontiers Media S.A.Frontiers in Materials2296-80162024-01-011010.3389/fmats.2023.13348151334815Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloyFangjia Liu0Fangjia Liu1Chong Yang2Chong Yang3Zijun Liao4Hairui Wu5School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, ChinaShunde Innovation School, University of Science and Technology Beijing, Foshan, Guangdong, ChinaBeijing General Research Institute of Mining and Metallurgy, Beijing, ChinaNational Key Laboratory of Intelligent Optimization Manufacturing for Mining and Metallurgy Process, Beijing, ChinaSchool of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, ChinaNational Engineering Technology Research Center of Flat Rolling Equipment, University of Science and Technology Beijing, Beijing, ChinaIn this work, the hot deformation behavior and microstructure evolution of ZK60 alloy are investigated. Meanwhile, constructive models and hot processing maps of ZK60 alloy during thermal tension are also established. Toward these ends, thermal tensile tests were performed at elevated deformation temperatures (523 K–673 K) and wide-ranging strain rates (0.0005 s−1 to 0.1 s−1). The findings indicated that as the tensile temperature increases and the strain rate decreases, the flow stress exhibited a decrease. To better evaluate the flow behavior of the alloy, Arrhenius model coupled strain effects and particle swarm optimization support vector machine (PSO-SVM) regression model are developed. Both the developed Arrhenius model and PSO-SVM regression model could depict the flow stress of the hot deformation ZK60 alloy. However, the results comparison revealed that the PSO-SVM regression model provides a more accurate prediction of the stress in the studied alloy with the AARE and R of 1.12% and 0.9984, respectively. The microstructure observation revealed that the primary softening mechanism in the alloy is predominantly dynamic recrystallization (DRX). Using the created hot processing map, the stability processing areas for this alloy were concentrated in the range of 573 K–653 K with a strain rate of 0.001 s-1 to 0.08 s-1. The described model is implemented in the finite element software. Then, the wire-drawing process of ZK60 alloy is also simulated.https://www.frontiersin.org/articles/10.3389/fmats.2023.1334815/fullZK60 magnesium alloyhot deformation behaviorsconstructive modelmicrostructurewire-drawing |
| spellingShingle | Fangjia Liu Fangjia Liu Chong Yang Chong Yang Zijun Liao Hairui Wu Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy Frontiers in Materials ZK60 magnesium alloy hot deformation behaviors constructive model microstructure wire-drawing |
| title | Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy |
| title_full | Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy |
| title_fullStr | Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy |
| title_full_unstemmed | Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy |
| title_short | Prediction of flow stress and microstructure evolution mechanism during thermal tensile process of ZK60 alloy |
| title_sort | prediction of flow stress and microstructure evolution mechanism during thermal tensile process of zk60 alloy |
| topic | ZK60 magnesium alloy hot deformation behaviors constructive model microstructure wire-drawing |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2023.1334815/full |
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