Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding
The effect of tool morphology on the joint forming during probeless friction stir spot welding (P-FSSW) of an Al–Li alloy was evaluated with the assistance of experiments and numerical simulation. Compared to the flat tool, the surface temperature not only increased rapidly at the inner side of the...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421003574 |
| _version_ | 1819242329015320576 |
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| author | Q. Chu S.J. Hao W.Y. Li X.W. Yang Y.F. Zou D. Wu |
| author_facet | Q. Chu S.J. Hao W.Y. Li X.W. Yang Y.F. Zou D. Wu |
| author_sort | Q. Chu |
| collection | DOAJ |
| description | The effect of tool morphology on the joint forming during probeless friction stir spot welding (P-FSSW) of an Al–Li alloy was evaluated with the assistance of experiments and numerical simulation. Compared to the flat tool, the surface temperature not only increased rapidly at the inner side of the shoulder periphery, but also locally appeared high value at the groove features using the tools with annular and involute profiles. In addition, the primary texture that developed during welding was determined to be a simple shear texture component of A/A¯, followed by B/B¯ and A1∗/A2∗, with the occurrence of continuous dynamic recrystallization. Based on the texture development, the circumferential material flow remained predominant due to the shear acting of the rotation shoulder. Meanwhile, the radial inward flow also existed to a certain extent, promoted by the involute feature, which was beneficial to improve the material circulation to obtain an enlarged welding area. Nevertheless, higher rotation speed for a long time should be avoided in P-FSSW as the surface material was prone to be excessively squeezed out to form flash due to the excavation effect. |
| first_indexed | 2024-12-23T14:38:04Z |
| format | Article |
| id | doaj.art-304fa9e23ad64a72916c704e0bbf2b05 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-23T14:38:04Z |
| publishDate | 2021-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-304fa9e23ad64a72916c704e0bbf2b052022-12-21T17:43:18ZengElsevierJournal of Materials Research and Technology2238-78542021-05-011220422054Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot weldingQ. Chu0S.J. Hao1W.Y. Li2X.W. Yang3Y.F. Zou4D. Wu5Corresponding author.; State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaState Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaCorresponding author.; State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaState Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaState Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaState Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, PR ChinaThe effect of tool morphology on the joint forming during probeless friction stir spot welding (P-FSSW) of an Al–Li alloy was evaluated with the assistance of experiments and numerical simulation. Compared to the flat tool, the surface temperature not only increased rapidly at the inner side of the shoulder periphery, but also locally appeared high value at the groove features using the tools with annular and involute profiles. In addition, the primary texture that developed during welding was determined to be a simple shear texture component of A/A¯, followed by B/B¯ and A1∗/A2∗, with the occurrence of continuous dynamic recrystallization. Based on the texture development, the circumferential material flow remained predominant due to the shear acting of the rotation shoulder. Meanwhile, the radial inward flow also existed to a certain extent, promoted by the involute feature, which was beneficial to improve the material circulation to obtain an enlarged welding area. Nevertheless, higher rotation speed for a long time should be avoided in P-FSSW as the surface material was prone to be excessively squeezed out to form flash due to the excavation effect.http://www.sciencedirect.com/science/article/pii/S2238785421003574Probeless friction stir spot weldingShoulder morphologyTexture developmentMaterial flowNumerical analysis |
| spellingShingle | Q. Chu S.J. Hao W.Y. Li X.W. Yang Y.F. Zou D. Wu Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding Journal of Materials Research and Technology Probeless friction stir spot welding Shoulder morphology Texture development Material flow Numerical analysis |
| title | Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding |
| title_full | Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding |
| title_fullStr | Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding |
| title_full_unstemmed | Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding |
| title_short | Impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding |
| title_sort | impact of shoulder morphology on macrostructural forming and the texture development during probeless friction stir spot welding |
| topic | Probeless friction stir spot welding Shoulder morphology Texture development Material flow Numerical analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421003574 |
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