Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys
Understanding of the ultrasonic effect on the process variables has important significance for the process optimization in ultrasonic vibration enhanced friction stir lap welding (UVeFSLW) of dissimilar Mg/Al alloys. In this study, the dislocation strain energy in both grain interior and grain bound...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422018385 |
| _version_ | 1797943036931473408 |
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| author | Ming Zhai ChuanSong Wu Lei Shi GaoQiang Chen QingYu Shi |
| author_facet | Ming Zhai ChuanSong Wu Lei Shi GaoQiang Chen QingYu Shi |
| author_sort | Ming Zhai |
| collection | DOAJ |
| description | Understanding of the ultrasonic effect on the process variables has important significance for the process optimization in ultrasonic vibration enhanced friction stir lap welding (UVeFSLW) of dissimilar Mg/Al alloys. In this study, the dislocation strain energy in both grain interior and grain boundary is considered to improve the formula for determing threshold thermal stress, and the constitutive equation is modified and used to develop the model for Mg/Al UVeFSLW process. The influences of ultrasonic vibration on heat generation, temperature profile, material flow and intermixing are quantitatively analyzed. It is found that the ultrasonic vibration induced the flow stress reduction gets larger, and the interfacial heat generation and viscous dissipation heat generation in the shear layer drop, which results in lower temperature at the tool/workpiece interface, intensifier material flow and larger material intermixed region in Mg/Al UVeFSLW. The interface temperature between the tool/workpiece and the profile of thermo-mechanically affected zone are experimentally measured, and compared with the predicted ones. The results show that the calculation accuracy of the modified model is improved. |
| first_indexed | 2024-04-10T20:18:03Z |
| format | Article |
| id | doaj.art-aaa7ff9950e8443081a4d63927402faa |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-10T20:18:03Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-aaa7ff9950e8443081a4d63927402faa2023-01-26T04:45:38ZengElsevierJournal of Materials Research and Technology2238-78542023-01-0122252268Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloysMing Zhai0ChuanSong Wu1Lei Shi2GaoQiang Chen3QingYu Shi4MOE 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; Shandong University-Weihai Research Institute of Industrial Technology, Weihai, ChinaDepartment of Mechanical Engineering, Tsinghua University, Beijing, ChinaDepartment of Mechanical Engineering, Tsinghua University, Beijing, ChinaUnderstanding of the ultrasonic effect on the process variables has important significance for the process optimization in ultrasonic vibration enhanced friction stir lap welding (UVeFSLW) of dissimilar Mg/Al alloys. In this study, the dislocation strain energy in both grain interior and grain boundary is considered to improve the formula for determing threshold thermal stress, and the constitutive equation is modified and used to develop the model for Mg/Al UVeFSLW process. The influences of ultrasonic vibration on heat generation, temperature profile, material flow and intermixing are quantitatively analyzed. It is found that the ultrasonic vibration induced the flow stress reduction gets larger, and the interfacial heat generation and viscous dissipation heat generation in the shear layer drop, which results in lower temperature at the tool/workpiece interface, intensifier material flow and larger material intermixed region in Mg/Al UVeFSLW. The interface temperature between the tool/workpiece and the profile of thermo-mechanically affected zone are experimentally measured, and compared with the predicted ones. The results show that the calculation accuracy of the modified model is improved.http://www.sciencedirect.com/science/article/pii/S2238785422018385Friction stir lap weldingUltrasonic vibrationDislocation strain energyMg alloyAl alloyNumerical simulation |
| spellingShingle | Ming Zhai ChuanSong Wu Lei Shi GaoQiang Chen QingYu Shi Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys Journal of Materials Research and Technology Friction stir lap welding Ultrasonic vibration Dislocation strain energy Mg alloy Al alloy Numerical simulation |
| title | Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys |
| title_full | Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys |
| title_fullStr | Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys |
| title_full_unstemmed | Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys |
| title_short | Dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar Mg/Al alloys |
| title_sort | dislocation strain energy based modeling for ultrasonic effect on friction stir lap welding process of dissimilar mg al alloys |
| topic | Friction stir lap welding Ultrasonic vibration Dislocation strain energy Mg alloy Al alloy Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422018385 |
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