Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/106738
Title: | Comparative study on local and global mechanical properties of bobbin tool and conventional friction stir welded 7085-T7452 aluminum thick plate | Authors: | Xu, W Luo, Y Zhang, W Fu, M |
Issue Date: | Jan-2018 | Source: | Journal of materials science & technology, Jan. 2018, v. 34, no. 1, p. 173-184 | Abstract: | 7085-T7452 plates with a thickness of 12 mm were welded by conventional single side and bobbin tool friction stir welding (SS-FSW and BB-FSW, respectively) at different welding parameters. The temperature distribution, microstructure evolution and mechanical properties of joints along the thickness direction were investigated, and digital image correlation (DIC) was utilized to evaluate quantitatively the deformation of different zones during tensile tests. The results indicated that heat-affected zone (HAZ), the local softening region, was responsible for the early plastic deformation and also the fracture location for SS-FSW samples, while a rapid fracture was observed in weld nugget zone (WNZ) before yield behavior for all BB-FSW specimens. The ultimate tensile strength (UTS) of SS-FSW joints presented the highest value of 410 MPa, 82% of the base material, at a rotational speed of 300 rpm and welding speed of 60 mm/min, much higher than that of BB-FSW joints, with a joint efficiency of only 47%. This should be attributed to the Lazy S defect produced by a larger extent of heat input during the BB-FSW process. The whole joint exhibited a much higher elongation than the slices. Scanning electron microscopic (SEM) analysis of the fracture morphologies showed that joints failed through ductile fracture for SS-FSW and brittle fracture for BB-FSW. | Keywords: | Aluminum alloy Bobbin tool Friction stir welding Mechanical properties Microstructure Temperature distribution |
Publisher: | Elsevier | Journal: | Journal of materials science & technology | ISSN: | 1005-0302 | DOI: | 10.1016/j.jmst.2017.05.015 | Rights: | © 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Xu, W., Luo, Y., Zhang, W., & Fu, M. (2018). Comparative study on local and global mechanical properties of bobbin tool and conventional friction stir welded 7085-T7452 aluminum thick plate. Journal of Materials Science & Technology, 34(1), 173-184 is available at https://doi.org/10.1016/j.jmst.2017.05.015. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fu_Comparative_Study_Local.pdf | Pre-Published version | 776.24 kB | Adobe PDF | View/Open |
Page views
12
Citations as of Jun 30, 2024
Downloads
3
Citations as of Jun 30, 2024
SCOPUSTM
Citations
68
Citations as of Jun 21, 2024
WEB OF SCIENCETM
Citations
63
Citations as of Jun 27, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.