Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool
Abstract The dissimilar friction stir lap welding of AA6061-T6 and mild steel using the hemispherical tool tilted towards the retreating side is investigated. Critical defects such as hook features and internal voids are avoided by limiting the plunge depth in the lower plate to a tenth of a millime...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-01-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-024-52412-w |
| _version_ | 1797349948332703744 |
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| author | Danilo Ambrosio Yoshiaki Morisada Kohsaku Ushioda Hidetoshi Fujii |
| author_facet | Danilo Ambrosio Yoshiaki Morisada Kohsaku Ushioda Hidetoshi Fujii |
| author_sort | Danilo Ambrosio |
| collection | DOAJ |
| description | Abstract The dissimilar friction stir lap welding of AA6061-T6 and mild steel using the hemispherical tool tilted towards the retreating side is investigated. Critical defects such as hook features and internal voids are avoided by limiting the plunge depth in the lower plate to a tenth of a millimeter. The low heat generation guaranteed by the hemispherical tool produces a nanoscale intermetallic compound layer alternatively composed of an Al-rich and a ternary Al–Fe–Mg phases. The complex and extremely thin interlayers strengthen the Al–Fe mechanical bonding, guaranteeing high mechanical properties and rupture within the Al-stirred zone. Thermomechanical phenomena governing friction stir lap welding with the hemispherical tool drastically limit the growth of intermetallics, leading to the high mechanical strength of the lap joint. |
| first_indexed | 2024-03-08T12:37:45Z |
| format | Article |
| id | doaj.art-b8900087912a42c99b248499c523c4bd |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-08T12:37:45Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-b8900087912a42c99b248499c523c4bd2024-01-21T12:21:06ZengNature PortfolioScientific Reports2045-23222024-01-011411810.1038/s41598-024-52412-wExtremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical toolDanilo Ambrosio0Yoshiaki Morisada1Kohsaku Ushioda2Hidetoshi Fujii3Joining and Welding Research Institute, Osaka UniversityJoining and Welding Research Institute, Osaka UniversityJoining and Welding Research Institute, Osaka UniversityJoining and Welding Research Institute, Osaka UniversityAbstract The dissimilar friction stir lap welding of AA6061-T6 and mild steel using the hemispherical tool tilted towards the retreating side is investigated. Critical defects such as hook features and internal voids are avoided by limiting the plunge depth in the lower plate to a tenth of a millimeter. The low heat generation guaranteed by the hemispherical tool produces a nanoscale intermetallic compound layer alternatively composed of an Al-rich and a ternary Al–Fe–Mg phases. The complex and extremely thin interlayers strengthen the Al–Fe mechanical bonding, guaranteeing high mechanical properties and rupture within the Al-stirred zone. Thermomechanical phenomena governing friction stir lap welding with the hemispherical tool drastically limit the growth of intermetallics, leading to the high mechanical strength of the lap joint.https://doi.org/10.1038/s41598-024-52412-w |
| spellingShingle | Danilo Ambrosio Yoshiaki Morisada Kohsaku Ushioda Hidetoshi Fujii Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool Scientific Reports |
| title | Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool |
| title_full | Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool |
| title_fullStr | Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool |
| title_full_unstemmed | Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool |
| title_short | Extremely thin intermetallic layer in dissimilar AA6061-T6 and mild steel friction stir lap welding using a hemispherical tool |
| title_sort | extremely thin intermetallic layer in dissimilar aa6061 t6 and mild steel friction stir lap welding using a hemispherical tool |
| url | https://doi.org/10.1038/s41598-024-52412-w |
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