Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation
Molecular dynamics (MD) simulation and experiments were carried out in this work to probe the microstructure evolution in the semi-solid compression (SSC) of AZ80 magnesium alloy. The liquid phase flow, stress fluctuations, grain refinement, dislocation generation, and texture evolution were discuss...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423020197 |
| _version_ | 1797646684979724288 |
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| author | Xiaohua Zhang Jiaqi Li Yuan Shi Qiang Chen Hongyan Yue |
| author_facet | Xiaohua Zhang Jiaqi Li Yuan Shi Qiang Chen Hongyan Yue |
| author_sort | Xiaohua Zhang |
| collection | DOAJ |
| description | Molecular dynamics (MD) simulation and experiments were carried out in this work to probe the microstructure evolution in the semi-solid compression (SSC) of AZ80 magnesium alloy. The liquid phase flow, stress fluctuations, grain refinement, dislocation generation, and texture evolution were discussed. Results indicate that the liquid phase was squeezed out along the radial direction prior the solid phase at the beginning of compression. Stress-strain curve represented obvious fluctuation at lower strain rates. That resulted from stress reduction caused by more liquid evolving with a lower strain rate at an elevated temperature. Plastic deformation was detected in grains and the dislocations of 1/3<11¯00> dominated the deformation, while and 1/3<12¯10> just been activated at the beginning of SSC process. The results of EBSD showed the grains size was refined into about 38.8 μm from 92.3 μm after SSC process. During the process, grain refinement resulted in the increase of low-angle grain boundaries (LAGBs), and a strong (0001) basal plane texture evolved at the end. The higher the strain rates, the stronger the texture. |
| first_indexed | 2024-03-11T15:06:16Z |
| format | Article |
| id | doaj.art-dde95b28714e44b58d072ac1e6e1a58e |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:06:16Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-dde95b28714e44b58d072ac1e6e1a58e2023-10-30T06:03:50ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012644554468Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulationXiaohua Zhang0Jiaqi Li1Yuan Shi2Qiang Chen3Hongyan Yue4School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaSchool of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaSchool of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaSouthwest Technology and Engineering Research Institute, Chongqing 400039, China; Corresponding author.School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, ChinaMolecular dynamics (MD) simulation and experiments were carried out in this work to probe the microstructure evolution in the semi-solid compression (SSC) of AZ80 magnesium alloy. The liquid phase flow, stress fluctuations, grain refinement, dislocation generation, and texture evolution were discussed. Results indicate that the liquid phase was squeezed out along the radial direction prior the solid phase at the beginning of compression. Stress-strain curve represented obvious fluctuation at lower strain rates. That resulted from stress reduction caused by more liquid evolving with a lower strain rate at an elevated temperature. Plastic deformation was detected in grains and the dislocations of 1/3<11¯00> dominated the deformation, while and 1/3<12¯10> just been activated at the beginning of SSC process. The results of EBSD showed the grains size was refined into about 38.8 μm from 92.3 μm after SSC process. During the process, grain refinement resulted in the increase of low-angle grain boundaries (LAGBs), and a strong (0001) basal plane texture evolved at the end. The higher the strain rates, the stronger the texture.http://www.sciencedirect.com/science/article/pii/S2238785423020197AZ80 magnesium alloyMolecular dynamics (MD) simulationSemi-solid compression (SSC)TextureDislocation |
| spellingShingle | Xiaohua Zhang Jiaqi Li Yuan Shi Qiang Chen Hongyan Yue Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation Journal of Materials Research and Technology AZ80 magnesium alloy Molecular dynamics (MD) simulation Semi-solid compression (SSC) Texture Dislocation |
| title | Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation |
| title_full | Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation |
| title_fullStr | Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation |
| title_full_unstemmed | Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation |
| title_short | Microstructure evolution of AZ80 magnesium alloy in semi-solid compression by molecular dynamics simulation |
| title_sort | microstructure evolution of az80 magnesium alloy in semi solid compression by molecular dynamics simulation |
| topic | AZ80 magnesium alloy Molecular dynamics (MD) simulation Semi-solid compression (SSC) Texture Dislocation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423020197 |
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