Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys
In friction stir welding (FSW) of dissimilar Al/Mg alloys, the materials on both sides in weld nugget zone (WNZ) undergo extremely uneven high temperature and plastic deformation, resulting in a great difference in dynamic recrystallization (DRX) which determines the weld microstructure evolution. I...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423025644 |
| _version_ | 1797301520824270848 |
|---|---|
| author | Faliang He ChuanSong Wu Lei Shi |
| author_facet | Faliang He ChuanSong Wu Lei Shi |
| author_sort | Faliang He |
| collection | DOAJ |
| description | In friction stir welding (FSW) of dissimilar Al/Mg alloys, the materials on both sides in weld nugget zone (WNZ) undergo extremely uneven high temperature and plastic deformation, resulting in a great difference in dynamic recrystallization (DRX) which determines the weld microstructure evolution. In this study, the multi-phase field model coupled with the dislocation density model is developed to conduct numerical simulation of DRX behavior in WNZ of Al/Mg alloys FSW with Mg placed on advancing side. It is found that during welding process, the grain size at the checking points in WNZ always decreases rapidly at first and then increases slowly to a stable value, while the dislocation density always increases first and then decreases to a stable level. After welding, the final grain size on Al's side is lower than that on Mg's side. As the welding speed decreases, the DRX becomes more intense, and the dislocation density curve fluctuates more frequently. The calculated final values of average grain size at both Al's and Mg's sides are in good agreement with the experimentally measured ones. |
| first_indexed | 2024-03-07T23:23:47Z |
| format | Article |
| id | doaj.art-62111e9ead054d0bb478f595a79236d9 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:23:47Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-62111e9ead054d0bb478f595a79236d92024-02-21T05:26:20ZengElsevierJournal of Materials Research and Technology2238-78542023-11-012726702683Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloysFaliang He0ChuanSong Wu1Lei Shi2MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, China; Shandong University, Weihai Research Institute of Industrial Technology, Weihai, ChinaMOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, China; Shandong University, Weihai Research Institute of Industrial Technology, Weihai, China; Corresponding author. MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, China.MOE Key Lab for Liquid-Solid Structure Evolution and Materials Processing, Institute of Materials Joining, Shandong University, Jinan, China; Shandong University, Weihai Research Institute of Industrial Technology, Weihai, ChinaIn friction stir welding (FSW) of dissimilar Al/Mg alloys, the materials on both sides in weld nugget zone (WNZ) undergo extremely uneven high temperature and plastic deformation, resulting in a great difference in dynamic recrystallization (DRX) which determines the weld microstructure evolution. In this study, the multi-phase field model coupled with the dislocation density model is developed to conduct numerical simulation of DRX behavior in WNZ of Al/Mg alloys FSW with Mg placed on advancing side. It is found that during welding process, the grain size at the checking points in WNZ always decreases rapidly at first and then increases slowly to a stable value, while the dislocation density always increases first and then decreases to a stable level. After welding, the final grain size on Al's side is lower than that on Mg's side. As the welding speed decreases, the DRX becomes more intense, and the dislocation density curve fluctuates more frequently. The calculated final values of average grain size at both Al's and Mg's sides are in good agreement with the experimentally measured ones.http://www.sciencedirect.com/science/article/pii/S2238785423025644Friction stir weldingAluminium alloyMagnesium alloyMulti-phase field simulationDynamic recrystallizationMicrostructure evolution |
| spellingShingle | Faliang He ChuanSong Wu Lei Shi Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys Journal of Materials Research and Technology Friction stir welding Aluminium alloy Magnesium alloy Multi-phase field simulation Dynamic recrystallization Microstructure evolution |
| title | Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys |
| title_full | Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys |
| title_fullStr | Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys |
| title_full_unstemmed | Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys |
| title_short | Phase-field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar Al/Mg alloys |
| title_sort | phase field simulation of dynamic recrystallization in friction stir weld nugget zone of dissimilar al mg alloys |
| topic | Friction stir welding Aluminium alloy Magnesium alloy Multi-phase field simulation Dynamic recrystallization Microstructure evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423025644 |
| work_keys_str_mv | AT falianghe phasefieldsimulationofdynamicrecrystallizationinfrictionstirweldnuggetzoneofdissimilaralmgalloys AT chuansongwu phasefieldsimulationofdynamicrecrystallizationinfrictionstirweldnuggetzoneofdissimilaralmgalloys AT leishi phasefieldsimulationofdynamicrecrystallizationinfrictionstirweldnuggetzoneofdissimilaralmgalloys |