Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels
Refill friction stir spot welding (RFSSW) is an emerging technology for joining aerospace aluminum alloys. The aim of the study is to investigate the effects of the refill friction stir spot weld spacing and the edge margin on the mechanical properties of multi-spot-welded AA7075-T6 panels. AA7075-T...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Journal of Manufacturing and Materials Processing |
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| Online Access: | https://www.mdpi.com/2504-4494/4/2/55 |
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| author | Guruvignesh Lakshmi Balasubramaniam Enkhsaikhan Boldsaikhan Shintaro Fukada Mitsuo Fujimoto Kenichi Kamimuki |
| author_facet | Guruvignesh Lakshmi Balasubramaniam Enkhsaikhan Boldsaikhan Shintaro Fukada Mitsuo Fujimoto Kenichi Kamimuki |
| author_sort | Guruvignesh Lakshmi Balasubramaniam |
| collection | DOAJ |
| description | Refill friction stir spot welding (RFSSW) is an emerging technology for joining aerospace aluminum alloys. The aim of the study is to investigate the effects of the refill friction stir spot weld spacing and the edge margin on the mechanical properties of multi-spot-welded AA7075-T6 panels. AA7075-T6 is a baseline aerospace aluminum alloy used in aircraft structures. The study employs an innovative robotic RFSSW system that is designed and developed by Kawasaki Heavy Industries (KHI). The experimental strategy uses Design of Experiments (DoE) to characterize the failure loads of multi-spot-welded panels in terms of the spot weld spacing, edge margin, and heat-affected zone (HAZ) of the spot weld. The RFSSW process leaves behind a thermal “imprint” as HAZ in heat-treatable aluminum alloys. According to the DoE results, larger spot weld spacings with no HAZ overlap produce higher failure loads of multi-spot-welded panels. On the other hand, edge margins that are equal to or less than the spot weld diameter demonstrate abnormal plastic deformations, such as workpiece edge swelling and weld crown dents, during the RFSSW process. The larger edge margins do not demonstrate such abnormal deformations during the welding process. |
| first_indexed | 2024-03-10T19:18:55Z |
| format | Article |
| id | doaj.art-6ec6af6b4c4d429488d53fb444db40c0 |
| institution | Directory Open Access Journal |
| issn | 2504-4494 |
| language | English |
| last_indexed | 2024-03-10T19:18:55Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj.art-6ec6af6b4c4d429488d53fb444db40c02023-11-20T03:07:11ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942020-06-01425510.3390/jmmp4020055Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded PanelsGuruvignesh Lakshmi Balasubramaniam0Enkhsaikhan Boldsaikhan1Shintaro Fukada2Mitsuo Fujimoto3Kenichi Kamimuki4Industrial, Systems & Manufacturing Engineering Department, Wichita State University, Wichita, KS 67260, USAIndustrial, Systems & Manufacturing Engineering Department, Wichita State University, Wichita, KS 67260, USACorporate Technology Division, Kawasaki Heavy Industries, Ltd., Akashi 673-8666, JapanCorporate Technology Division, Kawasaki Heavy Industries, Ltd., Akashi 673-8666, JapanAerospace Division, Kawasaki Heavy Industries, Ltd., Kakamigahara 504-8710, JapanRefill friction stir spot welding (RFSSW) is an emerging technology for joining aerospace aluminum alloys. The aim of the study is to investigate the effects of the refill friction stir spot weld spacing and the edge margin on the mechanical properties of multi-spot-welded AA7075-T6 panels. AA7075-T6 is a baseline aerospace aluminum alloy used in aircraft structures. The study employs an innovative robotic RFSSW system that is designed and developed by Kawasaki Heavy Industries (KHI). The experimental strategy uses Design of Experiments (DoE) to characterize the failure loads of multi-spot-welded panels in terms of the spot weld spacing, edge margin, and heat-affected zone (HAZ) of the spot weld. The RFSSW process leaves behind a thermal “imprint” as HAZ in heat-treatable aluminum alloys. According to the DoE results, larger spot weld spacings with no HAZ overlap produce higher failure loads of multi-spot-welded panels. On the other hand, edge margins that are equal to or less than the spot weld diameter demonstrate abnormal plastic deformations, such as workpiece edge swelling and weld crown dents, during the RFSSW process. The larger edge margins do not demonstrate such abnormal deformations during the welding process.https://www.mdpi.com/2504-4494/4/2/55refill friction stir spot weldingaerospace aluminum alloyrobotic spot weldingspot weld spacingedge margin |
| spellingShingle | Guruvignesh Lakshmi Balasubramaniam Enkhsaikhan Boldsaikhan Shintaro Fukada Mitsuo Fujimoto Kenichi Kamimuki Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels Journal of Manufacturing and Materials Processing refill friction stir spot welding aerospace aluminum alloy robotic spot welding spot weld spacing edge margin |
| title | Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels |
| title_full | Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels |
| title_fullStr | Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels |
| title_full_unstemmed | Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels |
| title_short | Effects of Refill Friction Stir Spot Weld Spacing and Edge Margin on Mechanical Properties of Multi-Spot-Welded Panels |
| title_sort | effects of refill friction stir spot weld spacing and edge margin on mechanical properties of multi spot welded panels |
| topic | refill friction stir spot welding aerospace aluminum alloy robotic spot welding spot weld spacing edge margin |
| url | https://www.mdpi.com/2504-4494/4/2/55 |
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