Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding
Dissimilar material joining via friction stir spot welding (FSSW) has been implemented in some automobiles. However, the effectiveness of this method is easily affected by the surface condition of the lower plate. To solve this problem, a method that combines tool contact to the lower plate and mate...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Journal of Advanced Joining Processes |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666330922000188 |
| _version_ | 1828327967410880512 |
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| author | Naoki Takeoka Taisuke Tsuchida Tomoki Matsuda Tomo Ogura Ryoji Ohashi Akio Hirose |
| author_facet | Naoki Takeoka Taisuke Tsuchida Tomoki Matsuda Tomo Ogura Ryoji Ohashi Akio Hirose |
| author_sort | Naoki Takeoka |
| collection | DOAJ |
| description | Dissimilar material joining via friction stir spot welding (FSSW) has been implemented in some automobiles. However, the effectiveness of this method is easily affected by the surface condition of the lower plate. To solve this problem, a method that combines tool contact to the lower plate and material refilling via refill FSSW (RFSSW) was developed. This method was named scrubbing RFSSW (Sc-RFSSW). In Sc-RFSSW, the plunging depth of the shoulder is larger than that in conventional RFSSW. In this study, the relationship between the process parameters and maximum joint load of an Sc-RFSSW joint composed of an aluminum alloy and non-coated mild steel was determined using design of experiments (DoE). The results of DoE showed that the maximum joint load was improved by reduction of the tool plunging depth into the lower plate, such that it was only scrubbing the lower plate interface. In the optimized Sc-RFSSW joining condition, a nugget pull out was stably obtained in both TSS and CTS. In addition, it was demonstrated that, in joining an aluminum alloy and non-coated mild steel, Sc-RFSSW provides a higher maximum joint load than that of conventional FSSW. The unloading test results confirmed that the maximum joint load of Sc-RFSSW was within the welded area, which was equivalent to the tool outer diameter. Moreover, an extremely thin amorphous layer with a thickness of 4–6 nm was observed at the interface of the Sc-RFSSW joint. |
| first_indexed | 2024-04-13T20:02:17Z |
| format | Article |
| id | doaj.art-9ac1eff6530843a0a7f309a5b655fb1f |
| institution | Directory Open Access Journal |
| issn | 2666-3309 |
| language | English |
| last_indexed | 2024-04-13T20:02:17Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Advanced Joining Processes |
| spelling | doaj.art-9ac1eff6530843a0a7f309a5b655fb1f2022-12-22T02:32:09ZengElsevierJournal of Advanced Joining Processes2666-33092022-06-015100112Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot WeldingNaoki Takeoka0Taisuke Tsuchida1Tomoki Matsuda2Tomo Ogura3Ryoji Ohashi4Akio Hirose5Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan; Corporate Technology Division, Kawasaki Heavy Industries, Ltd., Akashi City, Japan; Corresponding author.Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, JapanDivision of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, JapanDivision of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, JapanCorporate Technology Division, Kawasaki Heavy Industries, Ltd., Akashi City, JapanDivision of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, JapanDissimilar material joining via friction stir spot welding (FSSW) has been implemented in some automobiles. However, the effectiveness of this method is easily affected by the surface condition of the lower plate. To solve this problem, a method that combines tool contact to the lower plate and material refilling via refill FSSW (RFSSW) was developed. This method was named scrubbing RFSSW (Sc-RFSSW). In Sc-RFSSW, the plunging depth of the shoulder is larger than that in conventional RFSSW. In this study, the relationship between the process parameters and maximum joint load of an Sc-RFSSW joint composed of an aluminum alloy and non-coated mild steel was determined using design of experiments (DoE). The results of DoE showed that the maximum joint load was improved by reduction of the tool plunging depth into the lower plate, such that it was only scrubbing the lower plate interface. In the optimized Sc-RFSSW joining condition, a nugget pull out was stably obtained in both TSS and CTS. In addition, it was demonstrated that, in joining an aluminum alloy and non-coated mild steel, Sc-RFSSW provides a higher maximum joint load than that of conventional FSSW. The unloading test results confirmed that the maximum joint load of Sc-RFSSW was within the welded area, which was equivalent to the tool outer diameter. Moreover, an extremely thin amorphous layer with a thickness of 4–6 nm was observed at the interface of the Sc-RFSSW joint.http://www.sciencedirect.com/science/article/pii/S2666330922000188Dissimilar metal joiningFriction stir spot weldingRefill friction stir spot weldingMaximum joint loadUnloading test |
| spellingShingle | Naoki Takeoka Taisuke Tsuchida Tomoki Matsuda Tomo Ogura Ryoji Ohashi Akio Hirose Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding Journal of Advanced Joining Processes Dissimilar metal joining Friction stir spot welding Refill friction stir spot welding Maximum joint load Unloading test |
| title | Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding |
| title_full | Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding |
| title_fullStr | Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding |
| title_full_unstemmed | Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding |
| title_short | Analysis of Mechanical Properties of Dissimilar Material Joint Using Scrubbing Refill Friction Stir Spot Welding |
| title_sort | analysis of mechanical properties of dissimilar material joint using scrubbing refill friction stir spot welding |
| topic | Dissimilar metal joining Friction stir spot welding Refill friction stir spot welding Maximum joint load Unloading test |
| url | http://www.sciencedirect.com/science/article/pii/S2666330922000188 |
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